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Suunto S6 Watch User Manual

1. APPENDIX A Troubleshooting File Transfer Is Slower Than It Should Be e You may have an older UART For best throughput install a 16550AFN UART See the Quick Start chapter for information on how to identify your UART e Ifyou are running under Windows 3 1 and have a 16550AFN UART you must replace the Windows serial driver COMM DRYV to take full advantage of the UART s speed e Ifyou are using a slow transfer protocol such as Xmodem or Ker mit try Zmodem or Ymodem G instead Is your line noisy If there is static on your line the modem has to re send many blocks of data to insure accuracy You must have a clean line for maximum speed e Are you downloading a compressed file with MNP 5 hardware com pression enabled Since hardware data compression cannot com press a file already compressed by an archiving program the transfer can be marginally slower with data compression enabled than with it disabled e Try entering the L8 List Online Diagnostics command in on line mode making a screen print of the diagnostics listing and checking for parameters that may be unacceptable number of re trains round trip delay etc Am Losing Data e Ifyou are using data compression and a high speed serial port set the serial port baud rate to four times the data rate e Your UART may not be reliable at serial port speeds over 9600 bps or 19 200 bps Turn off data compression reset your serial port speed to
2. 27 3 2 2 The 16550 UART and Windows 3 1 oo eee 28 3 3 Configuring Your Software ccccssescsseesesssesscseesessees 29 3 3 1 Configuring Software for Your Modem 006 29 3 4 PG Initialization Strings oannes n 30 3 4 1 Changing Default Parameters cece ceeeseeeeeeeeees 30 3 4 2 Other Parameters sonsir a 31 3 5 Macintosh Initialization ss ssssssessssessesrsseressssessesesessesessesesee 31 3 6 Configuring Software for Your Compute cccee 32 3 6 1 Configuring Software for the Remote System 32 3 6 2 Terminal Emulation ou cece eee ceesscesesecsseseeneseseeees 33 3 6 3 File Transfer Protocols 0 cccc ec ceescessesecseeseeeseeseeees 33 SERIES II INTELLIGENT DATA FAX MODEMS 3 7 When to Disable Data Compression cccceeeeseeseeeeeee 33 3 7 1 Disabling Error Correction 0 0 eeeseeeseeeeeeteeees 34 Chapter 4 Manual Dial and Automatic Answer 4 1 Introduction aeaaee i E n a E N R Ei 35 4 2 Dialing On Line Answering ssesssesseeeessssessrsesesseseseeneee 35 4 3 Auto Leased Line Restoral Operation 336 Only 37 4 4 Manual Dial Backup Call Termination 336 Only 37 4 5 Dial Backup and Leased Line Restoral 336 Only 37 4 6 Dial Up Operation 336 Only cece csesseeeeeeees 39 4 7 Manual Call Origination ee eseee cece eeeseneeeeeeeeaeeees 39 4 8 Automatic Answering oo cece eccseeeeceeeese ena 40 4 9 Manual AnSwerinn g i at
3. 9 Ifyou want Callback Security turned off type AT DB0 and hit RETURN To set parity of the password message prompt 10 The parity default value for your modem is no parity AT P0 If your modem s prompt messages use even parity enter AT P2 and hit RETURN For odd parity enter AT P1 and hit RETURN 11 Enter the amp W0O command and hit RETURN to store parameters and S Register values in RAM SERIES II INTELLIGENT DATA FAX MODEMS Table 7 2 Callback Password and Dial Back Phone Number Entry Procedures Step Procedure 1 Enter your modem s LOGIN Password as selected in Table 7 1 by entering the following ATHIXXXXXXXXXX lt CR gt xxxxxxxxxx from Table 7 1 Enter your modem s Setup Password as selected in Table 7 1 by entering the following AT Syyyyyyyyyy lt CR gt yyyyyyyyyy from Table 7 1 2 Enable the Callback Security feature by entering the following AT DB2 lt CR gt EorE AT DB1 lt CR gt The following message is displayed on your monitor Entering Callback Mode current phone numbers will be erased Do you want to continue Y N 3 Entera Yor Nand hit RETURN Note If this is your first time into Callback Mode we recommend answering Y to clear all previous Callback Passwords and phone numbers from memory 4 Enter individual Callback Passwords for each of 30 different phone number memory locations as follows AT CBNOXXXXXXXXXx lt CR gt To enter Callback Password for the first location a minimum 6
4. ATX4 amp E1 amp E5 amp E13 amp E15DT17247465500N3 This would store the entire command at location N3 Number Linking NN You may command the Series IT Modem to dial another number automatically if the first number dialed is busy This would be useful in a situation where a computer can be accessed through more than one phone number This is called linking CHAPTER 5 Command Mode To link the number in N1 to the number N2 simply enter ATN1N2 and hit RETURN Several numbers can be linked in the same command For example you could link N1 to N2 to N3 to N4 by entering ATN1N2N3N4 and RETURN or you could link N1 to N2 and back to N1 and then back to N2 by entering ATN1N2N1N2 and RETURN The only limit on the number of numbers that can be linked is the 60 characters allowed in a command line Number linking can not be used with blind dialing since busy signals would not be detected You would have to select the Wait for Dial tone dialing method using the X Command in order to use the Number Linking feature Listing Numbers Stored in Memory L Telephone numbers that you have stored in the Series II Modem s memory may be listed and displayed with the L command It will display all ten stored N numbers in a format like that shown below All digits and command letters will be shown The phone number s single digit designation 0 through 9 is shown first followed by the complete dialing command and telephone number as originally
5. In this mode Slave Clocking all timing is controlled by the receive clock 5 4 5 Command Response Result Code Commands Echo Command Mode Characters E If the Series II Modem is connected to a full duplex computer it may be necessary for the modem to be configured to echo back characters entered while in the Command Mode in order for them to be displayed The E command is used to configure the Command Mode echo with ATEO disabling the echo and ATE1 enabling the echo default Result Codes Enable Disable and No Response Answer Q The Q command enables or disables Result Codes and the No Response Answer mode of operation Result Codes may be disabled altogether in certain applications such as computer controlled auto dialing using the Q command ATQ1 disables Result Code transmissions ATQO or ATQ enables Result Code transmission Regarding No Response Answer you may want the answer mode handled without responses and echo turned off but want the originate mode still intelligent This is called the No Response Answer mode ATQ2 selects the No Response Answer mode If you do not select any mode the factory default setting enable Result Codes is automatically selected Result Codes Series II or Standard AT amp Q The Series II Modem gives you a choice between the Series II Result Codes and Result Codes that more closely match the standard AT command set responses see section 5 3 AT amp Q1 selects AT response
6. 0 through 9 P T and Some additional dialing characters may be available based on country regulations APPENDIX G V 25bis Operation Listing Delayed Phone Numbers RLD Command When a phone number is dialed by a CRN command and a connection is not made the number is entered in the modem s V 25bis Delayed Number list along with the number of retry attempts Any further dialing attempts will be delayed some amount of time determined by the regulations of each country While the delay is in progress the modem will give a DLC indication The list contains eight numbers When filled the next number failing bumps off the oldest number on the list onto the Forbidden Number list Numbers on the Delayed Number list that succeed in a connect attempt are removed If a certain number of failed attempts occur the number of failed attempts is specified by each country the number is entered into the V 25bis Forbidden Phone Number List Forbidden phone numbers cannot be dialed at all To list the phone numbers on the V 25dis Delayed Phone Number List enter RLD and hit RETURN Listing Forbidden Phone Number RLF Command Those phone numbers that have failed to connect the required number of times as specified by country regulations are removed from the Delayed Number list and entered onto the V 25bis Forbidden Number list Numbers on the Forbidden Number list cannot be dialed at all for some maximum amount of time which is
7. 26 4K This register compensates for line conditions that have trouble supporting higher Enhanced V 34 speeds e g 33 6K 31 2K 28 8K 26 4K 24K The modem default is a value of 0 which indicates a connection attempt of 33 6K SERIES II INTELLIGENT DATA FAX MODEMS 6 2 Reading and Assigning S Register Values The S command is used to assign a value to and to read the current value of an S Register To read an S Register value enter the letter S followed by the S register number and a question mark then hit RETURN For example entering ATS7 and hitting RETURN displays the value of S Register S7 in a 3 digit decimal form The number 8 would appear as 008 the number 30 would appear as 030 and the number 255 would appear as 255 To assign a value to an S Register enter the letter S followed by the S Register number and an equals sign and then a decimal response to the message ENTER THE NEW VALUE IN DECIMAL FORMAT Convert all ASCII characters to their decimal equivalents before entering them S Register decimal values range from 0 127 for ASCII characters or 0 255 for numeric values 6 2 1 Examples of Assigning Values l Let s say you wish to have longer pauses caused by the comma in a dial command five seconds instead of two Entering ATS8 5 assigns 5 as the value for S Register S8 meaning the modem pauses five seconds for a comma in a dial command 2 Inasecond example let s say that you wish to
8. DOWN 3 DbM Transmit 9dB 15dB UP Async Sync Lease Line DOWN 4 UUCP Enable Disable UP Async Dial Up Leased Line DOWN 4 AS 400 Enable Disable UP Sync Dial Up Leased line DOWN 5 Auto Answer Enable Disable UP Async Sync Dial Up DOWN 5 Answer Originate DOWN Async Sync Leased Line UP 6 Max Thru Enable Disable UP Async Dial Up Leased DOWN 6 Slave Clock Enable Disable UP Sync Dial Up Leased DOWN 7 RTS Normal Forced UP Sync Async Dial Leased DOWN Factory Default Setting SERIES II INTELLIGENT DATA FAX MODEMS Sw Function Position Effect 8 Command Mode Enabled UP Sync Async Dial Leased DOWN 9 Local Remote LoopBack UP Async Sync Dial Leased DOWN 10 Dial Up Leased Line UP DOWN 11 AT vs Series IT Result Codes UP Asynchronous DOWN 11 Internal External Clocking UP Synchronous DOWN 12 Sync Async Mode UP DOWN Factory Default Setting DIP Switches 13 16 SWITCH CONDITION EFFECT 13 14 UP UP 28 8 K bps Operation 13 14 DOWN UP 19 2 K bps Operation 13 14 UP DOWN 14 4 K bps Operation 13 14 DOWN DOWN 9600 bps Operation Note Modem baud rate commands such as MB33600 override the setting of these speed selection switches DIP switches 13 and 14 15 UP CD DSR from Interface 15 DOWN CD DSR Forced On 16 UP 2 Wire Leased Line 16 DOWN 4 Wire Leased Line Standard Factory Default Setting APPENDIX A Troubleshooting Appen
9. Factory Default Setting 336 Model MD1641A Only Command _ Values Description Fn n 0 thru 2 F0 means no fallback when on line F1 means fallback from 33600 to 4800 bps when on line increments of 2400 bps F2 means fallback to 4800 bps from 33 6K bps fall forward if line improves increments of 2400 bps amp Fn n 0 80r9 amp F loads factory default values from ROM amp F8 reads factory default values and switch settings when amp F is issued amp F9 reads parameters stored in non volatile memory when amp F is issued FCn n Oorl FCO means no transmit of 5 second 2100Hz signal FC1 transmits 5 second 2100Hz signal Fn n Oorl FO means do not fall back to normal connect if CR received F1 means fall back to normal connect if CR received APPENDIX C Command Summary amp Gn n 0 1or2 amp G0 turns off CCITT guard tones amp G1 turns on CCITT 550 Hz guard tone amp G2 turns on CCITT 1800 Hz guard tone Hn n 0orl HO means Hang Up go on hook H1 means Go Off Hook Hn n thru 3 H1 brings up Help Screen 1 H2 brings up Help Screen 2 H3 brings up Help Screen 3 In n 0 lor 2 I0 requests modem ID Il requests firmware revision I2 for MTS internal use 19 Read Only Command enables display of Windows 95 Autodetect characteristics Factory Default Setting 336 Model MD1640A Only Command __ Values Description L Lists all stored telephone numbers in memory L5 L5 lis
10. If however you know that your application does not follow this profile please refer to Chapter 9 of this manual for full details on DIP Switch settings While you may operate your Series II Modem manually it is more likely that you will use your data communications software to either e enter terminal mode where you can speak most directly to the modem by issuing AT commands or to e launch a datacomm session through a set of modem configurations which you select and then associate with a target telephone number Once you have created saved and named this set of information according to your connection needs and your datacomm software s conventions the software then simplifies your dialing because you needn t re configure your modem nor run the risk of mistakenly keying in incorrect information Either way you need to understand that an AT command is the method by which your modem is controlled and must therefore prefix nearly all commands AT stands for attention and alerts the modem that a com mand follows You may enter these commands with either upper or lowercase characters Entering AT automatically sets the modem s serial baud rate to match your computer s and also sets the modem s parity It also clears the modem s command buffer Once you re in terminal mode enter AT followed by lt CR gt to check whether your modem is operational If everything s fine your modem will respond OK If your
11. M This string resets the Modem to the factory default settings selects ex tended result codes with NO DIAL TONE and BUSY and turns off auto answer M must end every string sent to the modem from software It is the ASCII code for the RETURN key on most keyboards and the default code for the carriage return character in the Modem and most communications programs The carriage return character is defined in the Modem in S register 3 if you change it you must also change the carriage return character code used in your communications software If you send a command directly to the modem in terminal mode rather than indirectly through communications software you must end the command string by pressing the RETURN key lt CR gt instead of adding AM to the string The following initialization string is fora Modem on a telephone line that functions solely as a DATA LINE AT amp F X4 SO 2 M 3 4 1 Changing Default Parameters By default the Series II Modem will answer after the first ring and try to communicate with a modem on the other end of the line If you have one telephone line for voice fax and modem communications the Modem may attempt to answer all incoming calls voice as well as data To change auto answer to default off open your communications program and type the following string in the terminal window AT amp F S0 0 amp F9 amp WO lt CR gt CHAPTER 3 Software Configuration This string selects the facto
12. Only Unit Minutes Range 0 255 Default 1 Description In the Series II Modem 336 MD1640A S19 is a timer that begins when the lease line goes down S19 specifies the duration of time the modem attempts to reestablish the lease line connection 24 PBX CBX Disconnect Drop Time for DSR CTS CD Unit 50 mSec intervals Range 0 255 Default 20 Description Some PBX and CBX phone systems require the modem s DSR CTS and or CD signal s to behave in a certain manner when calls are disconnected The Series II Modem s amp R amp S and amp C commands cause the modem to drop these signal s for a specified time period upon disconnect and then bring the signal s up again 24 defines the length of time that the signals drop The default setting of 20 results in a one second drop time which is what most PBX CBX systems with this requirement need 25 DTR Dropout Time Unit 100 mSec intervals Range 0 50 mSec 1 255 Default 0 Description S25 defines the amount of time that DTR must be dropped before the modem disconnects Typically a disconnect occurs when DTR is dropped for 50 milliseconds or more This CHAPTER 6 S Registers dropout time can be increased in 100 mSec intervals up to a maximum of 25 5 seconds S25 set to 255 The default S25 setting of zero corresponds to a dropout time of 50 mSec All other possible settings 1 through 255 correspond to their multiples of 100 mSec S26 Failed Password A
13. Power is supplied through an AC power transformer terminated with a standard two prong plug The transformer supplies low voltage AC to the modem and plugs into any conventional 115 volt AC 60 Hz two prong power outlet The power transformer supplied with the modem is the only one that should be used Use of any other transformer could cause damage to the modem A Power On Off switch is located on the back of the modem 1 8 Modem LED Indicators The Series II Modem has fourteen diagnostic LED indicators They are Answ Orig a Voice 33 000000000 0 0 O On eee Send Rev Carr 33 Fax Error Data Figure 1 1 LED Displays of the 336 MD1641A top and 336 MD1640A bottom 1 Transmit Send Data SD This LED blinks when data is being transmitted on for a space off for a mark The state of this LED matches the TD circuit on Pin 2 of the RS 232C V 24 interface 2 Receive Data RD This LED blinks when data is being received on for a space off for a mark The state of this LED matches that of the RD circuit on Pin 3 of the RS 232C V 24 interface 3 Carrier Detect CD This LED is lit when a valid carrier tone has been detected CHAPTER 1 Introduction and Description 4 28 800 bps 28 8 This LED behaves differently depending on your connection e When the modem is connected at 33 600 bps it blinks 5 times sec e When the modem is connected at 31 200 bps it blinks once sec e When the modem is
14. Refer to Chapter 6 for S Register details CHAPTER 4 Manual Dial and Automatic Answer 4 3 Automatic Leased Line Restoral Operation 336 Only When the Series II Modem 336 MD1640A is in Dial Backup mode it periodically checks the leased line to see if it s operational and tries to restore the leased line if possible S Register S18 determines how often restoral attempts occur The default for S18 is 30 minutes and can be set in one minute increments from 10 to 255 minutes Setting the restoral attempts under 10 minutes causes excessive breaks in the dial up operation Note Both local and remote modems must have S Register S18 set identically Refer to Chapter 6 for more information on S Register S18 4 4 Manual Dial Backup Call Termination 336 Only With your Series II Modem 336 MD1640A in leased line mode DIP Switch 10 in the DOWN position and with dial backup operation in process there are two ways to manually terminate the dial backup call other than automatic leased line restoral In each case you will try to establish the leased line connection because it is back in operating condition The methods of dial backup call termination are 1 Manual Control The Voice Data switch can be used to change from a dial back line to leased line by toggling down once When that is done the Modem tries the leased line connection and if it is good the modem disconnects the dial back call and establishes a leased line
15. and displays 15 19 24 26 value in 3 digit Decimal format 30 32 or 34 SBn n speed SB300 selects 300 bps at serial port SB1200 selects 1200 bps at serial port SB2400 selects 2400 bps at serial port SB4800 selects 4800 bps at serial port SB9600 selects 9600 bps at serial port SB19200 selects 19 200 bps at serial port SB38400 selects 38 400 bps at serial port SB57600 selects 57600 bps at serial port SB115200 selects 115200 bps at serial port amp SFn n O0orl amp SFO selects DSR follows CD amp SF1 selects DSR independent amp Sn n 0 lor2 amp S0 forces Data Set Ready On amp S1 lets Data Set Ready act normally amp S2 Data Set Ready drop is regulated by S24 on disconnect SPn n Oorl SPO0 disables UUCP Spoofing SP1 enables UUCP Spoofing Factory Default Setting APPENDIX C Command Summary Command _ Values Description T In Dial Comd Modem will tone dial numbers following the T amp Tn n 4or5 amp T4 means Enable Response to Request for Remote Digital Loopback amp T5 means Disable Response to Request for Remote Digital Loopback Tn n Oorl TO turns off Trellis Coded Modulation T1 turns on Trellis Coded Modulation Un n 0 1 2 or 3 U0 places modem in Analog Loop Originate Mode Ul places modem in Analog Loop Answer Mode U2 places modem in Remote Digital Loopback test mode U3 places modem in Local Digital Loopback test mode VDn n 0or 1 VDO disables Voi
16. characters up to a maximum of 10 characters must be used AT HCBN1XXXXXXXXXXx lt CR gt To enter Callback Password for the second location etc a minimum 6 characters up to a maximum of 10 characters must be used Note The first character of your first Callback Password must be non numeric 5 Enter individual phone numbers for each of the 30 memory locations as follows AT DP 2 N0 lt CR gt number for location NO CHAPTER 7 Callback Security and Remote Configuration AT DT N1 lt CR gt number for location N1 etc Note You must indicate within the command string that the modem either Pulse dials ATDP or Tone dials ATDT The maximum length of the number is 35 characters The number may include commands as well as your number so as to create macro type command numbers The and or characters entered before the phone number are optional The Deposit Number code allows a caller to enter the number he or she wishes the Callback modem to call back when the caller uses a particular password Step 3 of Table 7 3 The character enables direct entry when the caller uses that correct password Step 3 of Table 7 3 without the Callback modem having to return the call The entry at the end of the phone number is optional and indi cates a subcode number to the main phone number for that location The used to dial different extensions at the same basic number To use this opti
17. restarts it With regard to Binary Data Xon Xoff flow control is not recom mended because an Xoff character may be part of the data and would trigger an Xoff of the modem or software package which would halt data flow Xon Xoff Pass Through amp E7 So far you have had three choices to make regarding pacing 1 You can set the modem to respond to Xon Xoff pacing 2 You can set the modem to respond to RTS pacing 3 You can set the modem to ignore pacing completely Well we re not done with pacing yet There s another choice you can make which actually can apply to both pacing and modem initiated flow control although it applies mainly to pacing and that is something called Xon Xoff Pass Through This means that if your modem is set to respond to Xon Xoff com mands you can have the modem do one of the following 1 The modem responds to the Xon and Xoff pacing commands while at the same time allowing these commands to pass through the modem and on to the remote location We call this Respond Pass Through 2 The modem responds to Xon Xoff pacing but does not allow the pacing signals to pass through the modem and on to the remote location We call this Respond No Pass Through When Xon and Xoff commands are allowed to pass through the modem the computer or terminal at the remote site will receive these commands and depending on how it is configured the computer or terminal may respond to them al
18. 00 04 55 024 2A71 0213 kkkkkkkkkkk ONLINE DIAGNOSTICS kkkkkkkkkkk LINK TYPE V 34 LINE SPEED 28800 26400 SERIAL SPEED 19200 ERROR CNTRL COMPRESS LAPM FALL BACK FORWARD LOCALLY ENABLED DATA FORMAT ASYCHRONOUS SYMBOL RATE SYMETRIC 3429 3429 CARRIER FREQUENCY 1959 1959 TRELLIS ENCODER 4D 16 STATE 4D 16 STATE PRECODING OFF OFF TYPE DIAL UP RECV SIGNAL LEVEL 024 5 dBm TRANS SIGNAL LEVEL 011 dBm NUMBER OF RETRAINS 000 ROUND TRIP DELAY 0005 ms MEANINGFUL IN V34 AND V32 MODE NEAR FAR ECHO LEVEL 028 0 072 0 dBm ae E2 e ANSI Ifanileint nxiliaae craseni CAM lMaznn Nail PRINT OFFIT HINF KFVS 1 Figure 5 2 On line diagnostics information On or Off Hook H You can make the Series IT Modem hang up go On Hook Entering ATH1 lt CRp gt brings the line Off Hook just as if you picked up the telephone set You can hang up by entering ATHO or ATH the default is 0 when no number is entered Escape Sequences Entering Command Mode While Siill On Line AT lt CR gt It is possible to cause the Series II Modem to enter Command mode after the modem has gone on line with a remote modem without disconnecting the call This is done by entering an Escape Code The default Escape Code used by the Modem is three plus signs followed by the letters A and T up to sixty command characters most typically H to hang up and a RETURN The number of command characters allowed after
19. 24000 LAPM 26L CONNECT 26400 LAPM 28L CONNECT 28800 LAPM 3IL CONNECT 31200 LAPM 33L CONNECT 33600 LAPM Note 1 If the Series II Modem is used with data compression the word COMPRESSED or the letter Cis added to result codes Note 2 If the Standard AT Command Set 2400 responses are selected with the amp Q command the following responses change 9 not used 10 CONNECT 2400 Modem has detected carrier at 2400 bps and gone on line SERIES II INTELLIGENT DATA FAX MODEMS Appendix G V 25bis Operation Chapter 5 described a set of commands which let the Series I Modem dial hang up and be configured for various applications However these commands the AT command set are only functional when the DTE transmits data asynchronously That is they cannot be used with synchronous equipment such as that found in IBM s Binary Synchro nous Communications BSC and Synchronous Data Link Control SDLC environments The ITU V 25bis commands provide you with an alternate set of com mands and responses to those described in Chapter 5 for applications in which the DTE is synchronous V 25dis commands support dialing functions in asynchronous or synchronous mode according to the rec ommendations of the ITU however the AT commands are understood to reign in the asynchronous world while the V 25bis commands are relegated to the synchronous world of datacomm If you need to establish a datacomm link over Public Switched Teleph
20. 7 data bits 1 parity bit and 1 stop bit EB is functional in both command and on line mode EBO automatically detects parity when any AT command is issued AT EBO0 Use 10 bit words AT EB1 Use 11 bit words The factory default setting is AT EBO Parity Selection P The P command enables the setting of parity AT P0 selects no parity AT P1 selects odd parity AT P2 selects even parity and is the default value Note when setting up your data comm software it is critical that both your remote and local system s parity selection be set identically AT P0 no parity AT P1 odd parity AT P2 even parity The factory default setting is AT P2 CHAPTER 5 Command Mode 5 4 10 Compression Error Correction Flow Control Pass Through and Pacing Commands The Series II Modem has a variety of commands to control its error correction and data compression options These additional commands are listed below Remember to precede each command with the AT characters Factory default settings are marked with asterisks Normal Auto Reliable Reliable Mode Commands amp E0 Normal Mode amp E1 Auto Reliable Mode amp E2 Reliable Mode Modem lInitiated Flow Control Commands amp E3 Disables flow control no flow control amp E4 Hardware flow control CTS on off and RTS on off amp E5 Xon Xoff flow control Xon Xoff Pass Through Commands amp E6 Modem responds to Xon Xoff characters but does not allow Xon
21. 9 retries the number is put on the forbidden list 4 120 minute timer is started on entry to delay list 5 When it runs out the number is removed from whichever list it is on APPENDIX H Series II modem cables Appendix H Series Il Modem Cables These cables connect your Series II Modem to the serial port of your terminal or computer serial port DB25 DTE Connector DB25 DCE Connector on Computer etc on Modem cj 2 e Figure I 1 RS232 Cable IBM PC 8 pin mini DIN 1 3 ID 2 a n Rev 3 p Ea ESY RTS 4 o Handshake Out CTS 5 SA Handshake In GND 7 GND gt GND Figure I 2 Mac Cable SERIES II INTELLIGENT DATA FAX MODEMS The following cables are for 2 wire and 4 wire leased line connections using screw connectors Red Tip Green Ring To Terminal Block Screws Transmit and Receive RJ 11 plug Figure I 3 Two Wire Leased Line Connection Red AN Yellow Black Req To Terminal Block Screws Transmit and Receive RJ 11 plug Figure I 4 Four Wire Leased Line Connection 336 MD1640A Only APPENDIX I RS232C Interface Specifications Appendix RS232C Interface Specifications The Series II Modem s RS232C interface circuits have been designed to meet the electrical specifications given in EJA Electronic Industries Association RS232C standards All signals generated by the modem are approximately 10 volts when measured across a load of 3000
22. AT lt CR gt is defined by S Register S34 S Register S34 defaults to ten command characters CHAPTER 5 Command Mode When this is done the modem escapes to Command Mode executes the command if any and then remain in Command mode For example to hang up the modem at the end of a call enter ATH and hit RETURN There is no need to incorporate pauses before and after the plus signs as done in earlier modems BREAK AT lt CR gt The Series II Modem provides an alternative Escape method using a Break signal as the Escape Code The Break signal allows the start stop DTE data terminal equipment to signal the modem without loss of character transparency With this method a BREAK signal is used instead of the three plus signs The BREAK is followed by the letters A and T up to 60 command characters and RETURN When this is done the modem executes that command but remains in On Line mode unless the command was to hang up and or reset the modem an H or Z in which case the modem would be in the Command Mode after ex ecuting that command Escape Sequence Options Entering Command Mode While On Line E As mentioned the default escape sequence setting is for the modem to respond to the escape method Optional settings are for the modem to respond to the Break method for the modem to respond to either the or the Break Methods for the modem to ignore both methods and not escape for the modem to respond with no OK
23. After establishing the on line connection the Modem transmits a Link Request message to the answering modem The Link Request message is generally about 33 coded characters If the answering modem replies with an appropriate V 42 acknowledgment response the Modem switches into Reliable mode Otherwise it stays in Normal mode This V 42 Link Request handshaking procedure generally takes about five seconds When operating in V 42 Reliable mode the Series II Modem uses its memory or buffer to store data as it is received During periods of error caused retransmissions or compression slowdowns this buffer may fill up To prevent buffer overflow and subsequent loss of data the modem uses flow control to signal the computer attached to its RS232C port that the modem buffer is close to being full This causes the com puter to pause in its data transmission until the modem is able to empty its buffer sufficiently to accept more data at which time the modem signals the computer that it may resume transmission Flow Control is discussed in section 5 4 9 SERIES II INTELLIGENT DATA FAX MODEMS Reliable Mode amp E2 In Reliable mode the Series IT Modem uses its V 42 error correction capabilities during all transmissions and must be connected to another modem with a similar protocol activated MNP or LAP M V 42 Mode Select L The V 42 standard implements both MNP Class 3 amp 4 and LAP M error correction methods The V 42 Mode
24. Clock Pin 15 TC DB Direction from modem The TC signal is provided only when the Series IT Modem is used in the synchronous mode The clock is a square wave and is used to provide the computer or terminal with timing information for its Transmit Data circuit pin 2 This clock will be provided on the interface at all times when the modem is in Synchronous mode The first signal element of the Transmitted Data signal should be pre sented by the terminal on the first positive Off to On transition of TC which occurs after the CTS circuit on pin 5 has turned on The trans mitted data is sampled by the modem on negative transition of TC Receive Clock Pin 17 RC DD Direction from modem The RC signal has the same characteristic of Transmit Clock with the exception that it is used to provide the computer or terminal with timing information for its Receive Data pin 3 circuit The negative transition On to Off of RC indicates the center of each signal element on the Received Data circuit Data Terminal Ready Pin 20 TR or DTR CD Direction to modem This signal TR or DTR provides a means for the terminal or computer to control the modem s connection to the communications channel A high DTR signal is required by the modem to be able to communicate Turning DTR off for more than 50 mSec will force the modem to disconnect The most common use of DTR is in automatic answer applications A high DTR signal is required by the
25. Control RS 232 V 24 Computer or Modem ER data flow Terminal Computer Initiated Flow Control RS 232 V 24 Computer Modem Terminal or data flow Printer Figure 5 2 Flow Control and Pacing Hardware Flow Control amp E4 With Hardware Flow Control the modem uses its RS232C interface to control the flow of data from the computer or terminal to which it is attached The CTS Clear to Send signal on Pin 5 of the RS232C interface is brought low to stop the flow of data and is brought high to restart it When you select Hardware Flow Control as your Modem Initiated Flow Control method you will also be selecting it for Pacing The difference between the two however is that Modem Initiated Flow Control uses the Pin 5 CTS output signal while Pacing uses the Pin 4 RTS input signal Modem commands are used to select the method of flow control used by the Series II Modem when its error correction capabilities are used These commands are covered in Section 5 4 9 If neither method is selected the modem defaults to no flow control amp E3 CHAPTER 5 Command Mode Xon Xoff Flow Control amp E5 Xon Xoff is the most commonly used method of flow control Under this method control characters known as Xon and Xoff are inserted by the modem into the data to start and stop the flow of data from the computer or terminal to which the modem is attached Xoff which is a Control S stops the flow of data and Xon which is a Control Q
26. DOWN With DIP Switch 15 in the UP position both CD and DSR will be either on or off depending on the On Line status CD and DSR normal Switch 15 UP CD and DSR forced On Switch 15 DOWN Factory Default Setting UP Switch 16 2 Wire 4 Wire Operation Asynchronous Synchronous Mode The Series II Modem works over either 2 wire or 4 wire leased lines To select 4 wire operation place Switch 16 DOWN Default and to select 2 wire operation place Switch 16 UP 2 Wire Leased Line Switch 16 UP 4 Wire Leased Line Switch 16 DOWN Factory Default Setting DOWN Il 9 3 Speaker Volume Control You can adjust the volume of the Series II Modem s phone line monitor speaker with a volume control knob located on the back of the modem next to the RS232C connector see Figure 9 1 for location Turn the knob clockwise to increase the modem s volume and counterclockwise to decrease speaker volume See Speaker Control Command M in Section 5 4 6 CHAPTER 9 DIP Switch Settings 9 4 Recording Option Configurations This section lets you record any changes you may have made to the DIP Switch settings Circle the appropriate setting and record the effect for future reference DIP Switches Sw Function Position Effect 1 Force DTR DTR from Interface UP DOWN 2 Flow Control amp E4 amp E5 UP Async Dial Up Leased Line DOWN 2 SDLC BSC Sync UP DOWN 3 Result Codes Enable Disable UP Async Dial up
27. Have Occurred Unit Rings Range 0 255 Default 0 Description S1 counts the number of rings that have occurred It is a read type of register and is seldom if ever used in typical operation Each CHAPTER 6 S Registers time an incoming ring signal is detected S1 increases its value by one up to a maximum of 255 If you set S1 to a value other than its default value of zero or if the value is increasing with rings this new value remains stored in S1 for eight seconds after the last ring is counted after which time the value reverts to zero S2 Escape Code Character Unit Decimal equivalents of ASCII characters Range 0 127 Default 43 Description S2 defines the escape code character The default character is the plus sign 43 decimal but may be set for any ASCII character Setting an S2 value greater than 127 results in no escape character and therefore no means of entering Command mode from On line mode without breaking the on line connection 3 Return Character Unit Decimal equivalents of ASCII characters Range 0 127 Default 13 M Description S3 defines the character recognized as Carriage Return RETURN or Enter S3 may be set for any ASCII character S4 Line Feed Character Unit Decimal equivalents of ASCII characters Range 0 127 Default 10 AJ Description S4 defines the character recognized as Line Feed S4 may be set for any ASCII character SERIES II
28. Mode Listing Current Operating Parameters L5 L7 The L5 and L7 commands list the current operating parameters of your modem This information can be very useful when you are changing communications software or when you are changing modem default settings The command to list the Series II Modem s current operating parame ters is ATL5 for the basic parameters Entering ATL7 lists additional parameters on the Modem Listing S Register Values L6 Entering ATL6 lists the current values stored in the modem s S Register This information can be very useful if you wish to change S Register values Refer to Chapter 6 for more information on S Registers Listing On Line Diagnostics L8 The L8 command displays the current on line CONNECT status of the Series II Modem This display can be printed and used as a modem status report or as diagnostic information such as when calling Tech Support To activate this command first type AT lt CR gt on line escape command while maintaining command mode then type ATL8 What then displays on your monitor is your modem s current on line condition e g Link Type Line Speed Serial Speed Type of Error Correction Data Compression Number of past Retrains etc See Figure 5 2 on the next page for a sample screen as displayed through a Windows based terminal program SERIES II INTELLIGENT DATA FAX MODEMS File Edit Setup Perform Transfer Windows Feb29 96 4 50pm MEWDEF Connected t ice
29. Modem is a 336 MD1640A model refer to Chapter 4 for additional details on Dialing Automatic Answering Dial Back Up and Automatic Leased Line Restoral CHAPTER 2 Installation and Connection 2 4 1 Simple Operations You can dial a number by using the ATD command and the phone number of the modem with which you wish to connect e g ATD6127853500 Your modem will dial the number and hear a scrambling noise as the modem negotiates the kind of connection it can make and once the modems have settled on a common connection you will receive a connect message on your computer s video display As the modem dials and connects you may notice changes across its front LED panel the OH Off Hook LED lights to let you know the modem is operating as if you had picked up the handset to a phone The CD Carrier Detect LED lights to let you know the modem has detected a device it can connect to A speed LED lights to let you know at which speed the connection has been made To hang up a call enter ATH lt CR gt Your modem will return on hook just as if you had returned a phone s handset to its cradle Notice also that the OH CD and speed LED s are no longer lit Your video now displays OK signifying that your modem is ready for your next command 2 5 The Answer Originate Voice Data Toggle Switch Located on the front of the modem is a Voice Data toggle switch with Originate Answer capabilities This switch enables the
30. Select command L selects which type of error correction MNP or LAP M your Series II Modem uses for transmissions The various L command options are as follows L0 Command The L0 Command allows a pair of modems to negotiate which V 42 mode MNP or LAP M will be used in their transmissions Originate Mode a If both modems have LAP M capability the modems use LAP M mode b If one or both modems do not have LAP M capability and both have MNP the modems use the MNP mode L0 Command cont d Answer Mode a The answering modem responds to either an MNP Link Request or LAP M Originator Detection Pattern ODP signal depending on which the originating modem issues L1 Command The L1 Command sets your modem to MNP error correction and disables LAP M This command is for Originate mode only In Answer mode the modem still accepts MNP or LAP M L2 Command The L2 Command sets your modem to LAP M error correction and disables MNP CHAPTER 5 Command Mode This command is for Originate mode only Answer mode still accepts MNP or LAP M L3 Command In the prior commands the modems use a two phase process to establish a V 42 connection detection to establish whether the remote modem is also error correcting and then protocol establishment to deter mine parameters and to establish the error correction connection If you know that the other modem is a V 42 error correcting modem and you wish to use LAP M
31. amp BLACK BOX Mp a AUGUST 2000 MD1640A MD1641A Series II Modem 336 Series II Modem 336 SE ST LT RE CT EY PREIS SRI SRE OEE EES CEE SE E E WE TD EH I Aae CUSTOMER Order toll free in the U S Call 7877 877 BBOX outside the U S call 724 746 5500 SUPPORT FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 INFORMATION Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com Email info blackbox com Series Il Modems 336 and 336 Series Il Intelligent Data Fax Modems Model 336 Product Code MD1641 A Model 336 Product Code MD1640A lt BLACK BOX SERIES II INTELLIGENT DATA FAX MODEMS DISCLAIMER This publication may not be reproduced in whole or in part without prior expressed written permission from the manufacturer The manufacturer makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose The manufacturer reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of the manufacturer to notify any person or organization of such revisions or changes TRADEMARKS USED IN THIS MANUAL MNP and Microcom Network Protocol are trademarks of Microcom Inc AS 400 and System3x are registered trademarks of IBM Appletalk Mac and Macintosh are
32. automatic answer is to use S Register SO to configure the modem to answer on the Nth ring where N equals zero 0 Another alternative is to have the modem answer after five or six rings which gives you time to answer it manually if you wish See Chapter 6 for S Register information CHAPTER 4 Manual Dial and Automatic Answer 4 9 Manual Answering We have shown that the Series II Modem can automatically answer incoming calls The Modem can also answer manually under your control The most typical application involves you and another person who after carrying on a voice conversation want to convert to data communications between your modems without having to hang up and dial again The problem here is that both modems are in originate mode For two modems to communicate one of them must be in originate mode and the other must be in answer mode The solution here is to force either one of the two modems to Answer mode and the other to Originate mode The Modem can be forced into either Answer mode or Originate mode by using the Voice Data switch on the front of the modem In our example let s say that you and your friend Bill have just had a voice conversation Both of you have your telephones connected to your Series II Modems and your modems are connected to computers or terminals Set the speed switches to the proper speed on both modems To switch to Data mode from Voice mode you would switch the Voice Data switch Down
33. configure the Series II Modem to answer incoming calls after the 30th ring instead of after the first ring To configure S Register SO with a value of 30 enter ATSO 30 and hit RETURN 3 Ina third example let s say you are calling long distance to another country code and it is taking a long time to connect The S Register S7 Abort Timer setting of 45 seconds is insufficient The abort timer times out and cancels the call before a connection is made To change the S7 value to 55 seconds enter Command mode then enter ATS7 55 and hit RETURN Now after dialing the modem allows 10 more seconds for a carrier signal before aborting the call The additional 10 seconds should provide enough time for international calls CHAPTER 6 S Registers 6 2 2 Examples of Reading Values To verify that you entered the value correctly in the above examples enter ATS8 and hit RETURN in the first example ATSO in the second and ATS2 in the third example You should receive the response 005 in the first example 030 in the second example and 055 in the third example When configuring the S Registers it is a good practice to include the verification read entry in the same command line as the configuration assignment entry In the three preceding examples enter ATS8 5S8 ATS0 30S3 and ATS7 55S7 6 3 AT Command and S Register Summary The vast majority of installations are similar with the Series II Modem being used to dial up a remote
34. connected at 28 800 bps it is solidly lit Note if the modem falls back to 26 4K bps while in V 34 mode both the 28 8 and 24 0 LEDs light 5 24 000 bps 24 0 This LED is lit when the modem is connected at 24 000 bps Note if the modem falls back to 21 6K bps while in V 34 mode both the 24 0 and 19 2 LEDs light 6 19 200 bps 19 2 This LED is lit when the modem is connected at 19 200 bps 7 14 400 bps 14 4 This LED is lit when the modem is connected at 14 400 bps Note if the modem falls back to 12 000 bps while in V 32dis mode both the 14 4 and 96 LEDs light 8 9600 bps 96 This LED is lit when the modem is connected at 9600 bps 9 2400 bps 24 This LED is lit when the modem is connected at 2400 bps 10 Off Hook OH This LED is lit when the phone line is off hook This occurs when the modem is dialing on line or answering a call This LED also flashes when the modem is pulse dialing in Command mode 11 Terminal Ready TR When the TR LED is lit the modem is permitted to answer an incoming call When it goes off a connected modem will disconnect The state of the TR LED matches that of the DTR circuit on Pin 20 of the RS 232C V 24 interface 12 Error Correction EC This LED is lit when the modem is set for V 42 error correction and flashes on and off when data compression is activated SERIES II INTELLIGENT DATA FAX MODEMS 13 FAX FX This LED is lit when the modem is connected in FAX
35. connection 2 DTR Control If DTR Data Terminal Ready is turned off for 50 milliseconds or more a disconnect occurs This is probably the most common method used by computer systems at the automatic answer end of the line to cause the answering modem to disconnect after toggling off procedures 4 5 Dial Backup and Leased Line Restoral 336 Only The dialing associated with the Series II Modem 336 MD1640A when it s in leased line with dial back mode involves placing a call from the originating modem due to a leased line failure SERIES II INTELLIGENT DATA FAX MODEMS After a preset period of time determined by S Register 18 the modem automatically tries to restore the leased line The parameters used to determine if a leased line is down so automatic dial back can occur is based on the Series II Modem doing a retrain on the leased line due to an error condition in the transmission An error condition is defined as a hit on the line the Carrier gets interrupted The retrain is a handshake procedure between the modems to establish the Carrier again If the retrain fails both modems originate and answer modems start their Dial back timers The time is determined by S Register S19 settings The S19 default setting is one minute During that minute the originate modem tries to establish the leased line link If the leased line is established during that time the timer is cleared and everything is back to no
36. for an IBM 5853 modem in half duplex mode Next place DIP Switch 4 in the DOWN position This spoofs the Modem into operating like an IBM 5853 modem in AS 400 applications DIP Switch 4 in the UP position disables this function Note that the Modem must be in Command mode to allow AS 400 mode DIP Switch 8 DOWN and in Synchronous mode DIP Switch 12 UP CHAPTER 9 DIP Switch Settings AS 400 Mode Enabled Switch 4 DOWN AS 400 Mode Disabled Switch 4 UP Factory Default Setting UP Switch 4 Unix UUCP Spoofing Asynchronous Mode Leased Line Dial Up The Series II Modem can be configured for use with Unix equipment which employs ACK flow control to monitor data integrity The Modem can do UUCP spoofing where the modem is able to generate ACKs at the DTE interface Data then is transmitted more time efficiently because the delay of waiting for data to be received then waiting for the ACK to be returned at the remote end is eliminated Placing DIP Switch 4 in the DOWN position enables UUCP spoofing UUCP Spoofing Enabled Switch 4 DOWN UUCP Spoofing Disabled Switch 4 UP Factory Default Setting UP Switch 5 Enable Disable Auto Answer Ans Asynchronous Mode Synchronous Mode Dial Up In some originate only applications you may wish to disable the Series II Modem s automatic answering capabilities This may be true if you have a telephone set attached to a modem and wish to receive voice calls tha
37. is on e Make sure the power supply module is firmly connected to the modem and to the wall outlet or power strip SERIES II INTELLIGENT DATA FAX MODEMS e Ifthe power strip is on and the modem switch is on try moving the modem power supply to another outlet on the power strip e Test that the outlet is live by plugging a lamp into it The modem or power supply may be defective If you have another Series II Modem try swapping modems If the problem goes away the first modem or power supply may be defective Call Tech Support for assistance CAUTION Do not under any circumstances replace the power supply module with one designed for another product as it may damage the modem and void your warranty The Modem Does Not Respond to Commands e Make sure the modem is plugged in and turned on See None of the LEDs Light When the Modem Is On e Make sure you are issuing the modem commands from the data communications software either manually in terminal mode or au tomatically by configuring the software You cannot send com mands to the modem from the DOS prompt e Make sure you are in terminal mode in your data communications program then type AT and press ENTER If you get an OK re sponse your connections are good and the problem likely is in your phone book entry or session settings e Try resetting your modem by turning it off and on Make sure there is a reset command amp F in your initialization strin
38. mode 14 336 MD1640A only ERROR ERR When this LED is lit either the leased line is down and the modem is in dial backup mode or else the self test has failed 1 9 Controls on PC Board The Series II Modem is designed on a single printed circuit PC board This board contains one 16 position DIP Switch numbered 1 16 The DIP Switches are accessible through a cut out on the side of the modem There is also a knob which is used to adjust the speaker volume This knob is accessible through the modem s rear panel The sixteen DIP Switches control various modem options or set default values for Command Mode operation There is a difference in how several of the switches operate depending on whether you are in syn chronous or asynchronous mode Refer to the switch label on the bottom of the Modem for an exact list of the switch functions in asynchronous and synchronous operation Chapter 9 of this manual also provides detailed instructions on configuring all of the Modem s PC board options CHAPTER 2 Installation and Connection 2 Installation and Connection 2 1 Safety Warnings 1 Never install telephone wiring during a lightning storm 2 Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations 3 Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface 4 Use caution when installing or modifying te
39. mode while still maintaining the connection Then type AT amp M1U7 and hit ENTER to place the modem in Analog Loopback mode in the Answer mode Then repeat step 2 Local Series II Modem I i analog Computer or Terminal digital Type ATUO or ATUT hit ENTER Figure 8 5 Synchronous Mode Local Analog Loopback Test 8 8 Digital Loopback Test Local Manual Synchronous Mode This test must be run when you have a data connection with another modem If a Local Analog Loopback Test resulted in errors and this test passes without errors then the problem exists in your computer to modem connection In Digital Loopback Test local manual mode CHAPTER 8 Modem Testing data passed from the remote modem s transmit circuit are looped back from the local modem and are received at the remote modem s receive circuit multiple upper case U characters in Figure 8 6 First make certain that you are set up for Synchronous operation by placing DIP Switch 12 in the UP position To initiate the Digital Loopback Test local manual DIP Switch 9 must be in the UP position and the Answer Originate switch front of the modem must be toggled to the UP position Once you receive an OK message from your modem if responses are enabled the local modem is placed in Digital Loopback mode To exit the Digital Loopback Test local manual toggle the Answ Orig switch to the Answer position Computer Computer or Terminal or
40. modem to answer a call A frequently used method is to have the computer turn on DTR in response to RI Ring Indicator which allows the modem to answer Later DTR is APPENDIX I RS232C Interface Specifications turned off at the conclusion of the log off procedure which forces the modem to disconnect enabling it to receive another call In non auto answer applications it is advisable to leave DTR on using the modem s DIP switch option This is the standard factory setting An alternative is to provide a constant high DTR from the terminal or computer The Data Terminal Ready DTR LED indicates the status of this signal Ring Indicator Pin 22 RI CE Direction from modem This signal will remain on for the duration of the ringing signal When a ring signal is received by the modem the modem will automatically answer after the first ring The modem will answer after a specified number of rings which can be programmed in AT Command mode but if none is specified the modem will answer after the first ring External Transmit Clock Pin 24 XTC Direction to modem Supplies the same function as transmit clock on Pin 15 Terminal Busy Out of Service Pin 25 OOS Direction to modem The Terminal Busy OOS circuit is not defined in the RS232C standard but is used by us and most manufacturers to make the phone lines busy to incoming phone calls Pin 25 is not normally connected to the RS232C interface when shipped from the fac
41. modem to auto matically dial a phone number stored in the N1 location of memory whenever this switch is toggled Note that you must first enter AT VD1 amp W0 lt CR gt This command string enables Voice Data dialing when the Voice Data toggle switch is activated If you are manually dialing with an attached telephone device and not with your keyboard your Modem originates when this switch is toggled to the corresponding position DOWN and if you are manually answering modem is not configured to automatically answer via S Register S0 setup the Modem answers when this switch is toggled to the corresponding position UP SERIES II INTELLIGENT DATA FAX MODEMS 3 Software Configuration 3 1 Introduction Since your communications software configuration is affected by the capabilities of your computer this chapter begins with a discussion of the limitations of some serial ports and how to identify them It then discusses communications configuration in general and recommends settings specifically for the Series II Modem 3 2 Serial Port Limitations When you configure your software you need to consider how the hardware on both ends of the connection will affect the connection Some serial ports particularly those in older PC compatible computers may limit the performance of the Series II Modem You should know if yours is one of them The limiting factor is an integrated circuit called a Universal Asyn chronous Receiver
42. ohms or greater The receiving circuits of the modem will accept signals in the 3 to 25 volt range The voltage thresholds are Negative voltage more negative than 3 volts with respect to signal ground Positive voltage more positive than 3 volts with respect to signal ground SIGNAL INFORMATION NEGATIVE POSITIVE Binary State One Zero Signal Condition Mark Space Control and Timing Function Off On The input impedances of all modem circuits which accept signals from the data processing terminal or CPU equipment have DC resistances of 4 7K For more specific details consult the EIA RS232C standard itself The following chart lists the EIA RS232C interface pins and circuits present on the Series II Modem s RS232C Interface connector All other pins are unused Pin Abbrev EIA CCITT Signal Function No Circuit Circuit Source 1 PG 101 Protective Ground 2 SD BA 103 DTE Transmitted Data 3 RD BB 104 DCE Received Data 4 RTS CA 105 DTE Request to Send 5 CTS CB 106 DCE Clear to Send 6 DSR CC 107 DCE Data Set Ready 7 SG AB 102 Signal Ground 8 CD CF 109 DCE Carrier Detect Ore v v DCE Test Voltage 12 HS DCE High Speed 15 TC DB 114 DCE Transmit Clock 17 RG DD 115 DCE Receive Clock 20 TR CD 108 2 DTE Terminal Ready SERIES II INTELLIGENT DATA FAX MODEMS 22 RI CE 125 DCE Ring Indicator 24 XTC DA 113 DTE External Transmit Clock 25 OOS CN 142 DTE Terminal Busy Pin 9 need not be present in
43. on the RS 232C interface on the remote modem with a paper clip or some other metal device for example L EES Remote sites Short Pins 2 and 3 of the RS 232 interface PHONE psu Lease MWA INTERFACE PHONE PSTN LEASE INTERFACE von AOA POWER Y mi Figure 8 4A Back to Back Test Cabling CHAPTER 8 Modem Testing 9 Entered characters should echo back to the sending modem Local Back to Remote DTE modem back cable modem Figure 8 4B Back to Back Testing 8 6 Synchronous Mode Testing The following tests must be run with your modem in Synchronous mode DIP Switch 12 in the Up OPEN position DIP Switch 9 controls the modem s Synchronous mode testing function Refer to Chapter 9 for DIP Switch information The test procedures for Synchronous mode are different from those for Asynchronous mode In Synchronous mode you cannot access the modem s AT commands With DIP Switch 9 you can perform either the Digital Loopback Test remote automatic or the Digital Loopback Test local manual in Synchronous mode as described in the following sections There is
44. registered trademarks of Apple Computer Inc Unix is a registered trademark of X Open Co Ltd Microsoft and Windows are registered trademarks of Microsoft Corporation All other trademarks mentioned in this manual are the property of their respective owners Table of Contents Contents Chapter 1 Introduction and Description 1 1 JntroductO Neniae ai iiias 7 1 2 How To Use This Manual 0 0 ccccceecsseseseeseseeeeeeeeeeseneeees 7 1 3 What is in Your Modem Package cceceesseeeeceeeseeeen 10 1 4 Modemi Features moneen atana aaaeei aoina 10 1 5 Fa xtBCAtureS ci 2 tseceseevtesbeanioses a a aaa Aa ll 1 6 Technical Specifications esssssessssessserssesessssssrsesesseseseesesee 12 1 7 POWER mn E ra EAA a Ee EEEa TEN 16 1 8 Modem LED Indicators sinian i 16 1 9 Controls oni RG Boatdosnrrnr ii anan aE ERREN 18 Chapter 2 Installation and Connection 2 1 Safety WaN S c5 0c 5 ceietselevisesteersenccunesandvescvanvearsn O S 19 2 2 Installations iisictiwtactsidiacivtieessietniiniitietedicasiie 20 2 3 Is Your Series II Modem Ready for Use cece eceeeeees 23 2 4 Operating Your Series IT Modem cecececeteseeteee ersten 24 2 4 1 Simple Operations siini eii nS 25 2 5 The Answer Originate Voice Data Toggle Switch 25 Chapter 3 Software Configuration 3 1 INtOCUCHON sayen n a scents tesbesuishees coseteeeaas 26 3 2 Serial Port Limitations sneren naa a 26 3 2 1 How Can You Identify Your UART Type
45. soon as you connected power to the modem it performed a diagnostic self test The speed indicators flashed in sequence for approximately four seconds then the 28 8 indicator is lit The TR indicator should be lit as well The SD RD CD and OH indicators should remain off at this time If not check that the transformer is solidly connected and that your AC outlet is live If you re an experienced modem user you may simply want to check your modem s settings for data compression error correction and so on You may find that you can get moving quite quickly if you just issue an ATL5 ATL6 and an ATL7 command These commands lists how your modem is currently configured If you come across a setting you re unsure of refer to Chapters 5 and 6 of this manual for AT command and S Register explanations and defaults If you re a novice please continue to the next sections of this chapter SERIES II INTELLIGENT DATA FAX MODEMS 2 4 Operating Your Series Il Modem You control your Series II Modem by issuing AT commands setting S Registers and setting DIP Switches You can easily change the settings of your DIP Switches as they are located on the right side of your Modem s chassis Right now your Modem is set up for the most typical user application that is as a traditional modem set to make a dial up call to a remote installation where the call is answered automatically therefore you shouldn t need to change the DIP Switches
46. test the modem in Answer mode To do this you must escape from Originate mode by entering an Escape Sequence 4 AT lt CR gt or lt BREAK gt AT lt CR gt Then type ATU7 and hit ENTER to place the modem in Analog Loopback mode in the Answer mode Then repeat step 3 SERIES II INTELLIGENT DATA FAX MODEMS 5 When testing is completed you may exit Answer mode by entering an Escape Sequence AT lt CR gt or lt BREAK gt AT lt CRp gt which returns the modem to Command mode 6 Your modem passes this test if the data entered from your keyboard is the same as the data received on your monitor If different data is appearing on your monitor your modem is probably causing the problem although it could also be your computer If your modem passes this test but you are receiving errors while On line the remote modem or the phone line could be at fault 8 3 Digital Loopback Test V 54 Loop 2 Local Manual In this test your modem must be On Line with another modem that can respond to a request for Digital Loopback such as another Series II Modem The Digital Loopback Test is an on line test that loops data sent from one modem across the phone line to another modem then back to the first modem See Figure 8 2 There are two ways to put a modem into Digital Loopback mode 1 Locally or Manually described here in section 8 3 2 Remotely or Automatically see section 8 4 Note The Digital Loopback Tests can only be used
47. the L3 command disables the detection phase and goes directly to protocol establishment Both modems must have L3 in effect Auto Reliable Buffering A In Auto Reliable mode the modem is given four seconds to establish a Reliable connection After this four second period the modem drops to Normal mode Any data which is received during this period is typically discarded The A command can be used to cause the modem to buffer save data that is received during this Auto Reliable time out period This data will then be output by the modem after the CONNECT message AT A0 Discard data received during auto reliable time period AT A1 Buffer data received during auto reliable time period The factory default is A0 Enable Disable Auto Reliable Fallback Character F In Auto Reliable mode the modem is given four seconds to establish a Reliable connection If a single CARRIAGE RETURN is received from the remote modem during this four second period the Auto Reliable modem assumes that the remote modem is not in Reliable mode and drops to Normal non error correcting mode The CARRIAGE RETURN is the only character which causes the modem to drop to Normal mode Any other character will either be buffered or discarded SERIES II INTELLIGENT DATA FAX MODEMS The F command can be used to disable this fallback to Normal due to CARRIAGE RETURN feature The Auto Reliable fallback character F and Auto Reliable buffering A comm
48. the Callback Password corresponding to the phone number you wish called back and hit RETURN Callback Passwords and phone numbers entered in Table 7 2 You can also use special characters and They must have been entered as part of the Callback phone numbers in Step 5 of Table 7 2 If you use the character along with your password the Callback modem will connect directly without hanging up and calling back If you use the character along with your password you can also enter a phone number which you wish the Callback modem to dial after hanging up The and characters must be entered after the Dial back password i e DB gt xxxxxx This is also the point where you enter an extension number if your Callback number used the feature Step 5 in Table 7 2 You have three tries at each prompt to enter the information properly with an incorrect entry resulting in a password retry You must enter the requested information correctly within one minute or the Callback modem will hang up When the information is entered properly the called modem will hang up and after a 15 second delay call you back When your modem answers the dialback modem will respond with the following Password gt 4 Enter the modem s LOGIN Password again the same as in Step 1 The Callback modem responds with CONNECT You are now in Data Mode CHAPTER 7 Callback Security and Remote Configuration 7 3 2 Remote Configuration Procedures
49. 255 0 S36 sets the time between DTR inactive and the modem going off hook busy out S37 Seconds 0 255 5 S37 sets the time allowed DTR active and the modem responding on hook not busy S48 N A 33 31 0 S48 sets speed modem 28 26 24 connects within scope 21 19 16 of Enhanced V34 mode 14 12 96 e g S48 21 means and 48 maximum connect speed is 21 6K This register is useful when line conditions will not support higher V34 speeds The default value is 0 which indicates a connection attempt of 28 8K APPENDIX F Result Code Summary Appendix F Result Code Summary Command was executed without error ready for next command Modem has detected carrier and gone on line Modem has detected ring caused by incoming call No carrier signal has been detected within allowed time Error in Command line too many or invalid characters Modem has detected carrier at 1200 bps and gone on line No dial tone has been detected A busy signal has been detected Remote system did not answer Modem has detected carrier at 2400 bps and gone on line Modem has detected carrier at 4800 bps and gone on line Modem has detected carrier at 9600 bps and gone on line TERSE VERBOSE Effect Digit Words 0 OK 1 CONNECT 2 RING 3 NO CARRIER 4 ERROR 5 CONNECT 1200 6 NO DIAL TONE 7 BUSY 8 NO ANSWER 9 CONNECT 2400 11 CONNECT 4800 12 CONNECT 9600 13 CONNECT 14400 Mod
50. 400 2400 bps AT SB4800 4800 bps AT SB9600 9600 bps AT SB19200 19 200 bps AT SB38400 38 400 bps AT SB57600 57 600 bps AT SB115200 115 200 bps The factory default is 115 200 bps Note Some serial ports particularly those in older PC compatible computers may limit the performance of a higher speed modem like the Series II Modem see Chapter 3 The limiting factor is a circuit called a Universal Asynchronous Receiver Transmitter or UART All data from your modem flows through it 8250 16450 and 16550 are UARITSs typically used in PC compatible computers The 8250 is unreliable above 9 600 bps and the 16450 is unreliable above 19 200 bps The 16550 UART however is reliable to at least 115 200 bps With V 42bis data compression enabled the Modem can achieve throughputs approaching 115 2K depending on line quality and file content 5 4 12 Immediate Action Commands Help Screens H The Help command is designed to give you short explanations on how to use each Series II Modem command The Help command can be quite useful if your manual is not handy and you are in the middle of a communications session Although the explanations are quite abbreviat ed compared to those in this manual they should prove to be helpful reminders when needed SERIES II INTELLIGENT DATA FAX MODEMS At the time of this writing we have three screens of Help information Screen 1 2 and 3 and more screens may be added in the future T
51. 450 UART installed both of which are reliable to 19 200 bps If you would like more detailed information about your UART than MSD can provide you can download shareware UART identification programs from the World Wide Web from the IBM Communications Forum on CompuServe or from a local BBS SERIES II INTELLIGENT DATA FAX MODEMS 3 2 2 The 16550 UART and Windows 3 1 Windows 3 1 may cause a loss of data when communicating at high speed even with a 16550 UART installed Because Windows is multitask ing it switches between several programs running at the same time it can make the serial port wait briefly while Windows performs other tasks Meanwhile incoming data can be lost The older 8250A and 16450 UARTs can store data in a one byte first in first out FIFO buffer a memory area in the UART in which the first bit in is the first out but once the buffer is full the data is lost The 16550 has a 16 byte FIFO buffer which accounts for much of its high speed However in Windows 3 1 the 16550 s FIFO buffer is disabled by default To enable the buffer use Notepad to open the SYSTEM INI file in your Windows directory and add the following line to the 386Enh section COMnFIFO 1 where n is the number of the COM port the 16550 is installed on For example if the 16550 is installed on COM2 the line should be COM2FIFO 1 After you save SYSTEM INI you must restart Windows for the change to take effect However there i
52. CD and is the factory default amp SF1 enables DSR to operate independent of CD If this is your application refer to the amp S command for control of the Data Set Ready signal 5 4 8 Error Correction Commands You can use AT commands to place your Series II Modem one of three V 42 error correction modes of operation These are the Normal Auto Reliable and Reliable modes CHAPTER 5 Command Mode Normal Mode amp E0 In Normal mode of operation the Series IT Modem s V 42 error correc tion capabilities are disabled and the modem functions as a non error correcting modem Auto Reliable Mode amp E1 In Auto Reliable mode during the handshaking procedures at the start of the on line connection the Series II Modem automatically determines whether or not the modem with which it is communicating is using V 42 error correction If the Modem determines that the other modem is using V 42 it switches itself into MNP or LAPM Reliable V 42 mode and its error correction capability is enabled If it is deter mined that the other modem is not using V 42 the Modem remains in Normal mode without error correction The default setting is Auto Reliable mode amp E71 The method the Modem uses to determine if the modem it calls is a V 42 modem involves the use of a Link Request When the Series II Modem is in Auto Reliable mode and originates a call it goes through normal handshaking procedures just like any dial up modem
53. Data Set Ready Control amp S The amp S command allows you to control the status of the Data Set Ready signal DSR Pin 6 on the RS232C interface You have three choices You can force the signal high allow it to act normally or set it to stay high until the modem disconnects go low momentarily and then go high again The last option is useful with some CBX phone systems and mainframe front ends which require DSR to act in this manner To allow DSR to act normally enter the command AT amp S7 the default setting To force DSR on enter the command AT amp S9O To set up DSR so that it drops for one second on disconnect and then comes up again enter AT amp S2 If you want the drop time to be something other than one second use S Register S24 to change this value Refer to Chapter 6 CTS RTS Interaction Control amp RF In typical operation Clear to Send follows Request to Send when the modem is on line In other words if RTS goes off CTS goes off in response The amp RFO command enables CTS to follow RTS In some applications however it may be necessary for CTS to operate indepen dently of RTS amp RF7 allows CTS to operate independently regardless of the state of RTS and is the factory default If this is the case refer to the amp R command for control of the Clear to Send signal DSR CD Interaction Control amp SF In typical applications Data Set Ready DSR follows Carrier Detect CD amp SFO enables DSR to follow
54. IGENT DATA FAX MODEMS Voice Data Dialing VD Another alternate method of causing the Series IIT Modem to automatically dial is Voice Data Dialing With Voice Data Dialing the modem automatically dials the phone number stored in the N1 position of memory whenever the Voice Data switch is toggled You must first enter AT VD1 amp W0 lt CR gt This command string enables Voice Data dialing when the Voice Data toggle switch is activated To disable Voice Data Dialing default enter the command AT VDO W0 lt CR gt 5 4 2 Dial Modifier Commands There are several command characters that can be included within a dialing command following the letter D called Dial Modifiers They have various functions including the selection of Pulse or Tone Dialing pauses in the dial sequence automatic re dials if a number is busy and reverting to the Command mode or switching to the Answer mode after dialing Pulse or Tone Dial P or T The Series II Modem dials numbers using either pulse or tone dialing or a combination of both methods Pulse dialing is a method used by rotary dial telephones which involves the timed opening and closing of line relay Tone dialing is the method used by push button touch tone telephones and is sometimes referred to as DTMF or Dual Tone Multi Frequency dialing The method used is selected by including a P for Pulse or a T for Tone in the dialing command right before the digits you wish to have dialed in t
55. INTELLIGENT DATA FAX MODEMS 5 Backspace Character Unit Decimal equivalents of ASCII characters Range 0 127 Default 8 4H Description S5 defines the character recognized as BACKSPACE S5 may be set for any ASCII character S6 Wait Time for Dial Tone Unit Seconds Range 2 255 Default 2 Description S6 sets the time the modem waits after the RETURN key is pressed before executing a dial command The default setting is two seconds S7 Time for Carrier Abort Timer Unit Seconds Range 1 255 Default 45 Description S7 defines the Abort Timer lack of carrier delay time The default value is 45 seconds This means that after dialing the modem waits for a carrier signal for up to 45 seconds and if none is detected aborts the call The maximum S7 value is 255 S8 Pause Time for Comma Unit Seconds Range 0 255 Default 2 Description S8 sets the length of the pause caused by a comma inserted in a dialing command The CHAPTER 6 S Registers default setting is two seconds S8 may be set for up to 255 seconds S8 also sets the time the modem waits before retrying a call after detecting a busy signal Some computer systems need more than two seconds to reset in which case you should increase the value of S8 s9 Carrier Detect Response Time Unit 100 mSec intervals Range 1 255 Default 6 Description S9 sets the time delay between when the modem first detects a valid incoming carrier sign
56. Reading and Assigning S Register Values cccceseeee 102 6 2 1 Examples of Assigning Values 0 ccecesseeeseeseeeeees 102 6 2 2 Examples of Reading Values cc cececeseeeeseeeeseeees 103 6 3 AT Command and S Register SUMMATY cece 103 Chapter 7 Callback Security and Remote Configuration 7 1 Tr OGUICH Tiss tou tees ests cuschsntnebes aese 104 7 2 Callback Feature Description cece ce ececceetscneeeseeeeees 104 7 3 Remote Configuration Description cece cee eseeeeeeeees 105 7 3 1 Initial Setup Procedures for Callback and Remote Config r ti n cesecccssceisencesiecarssendeosspstsonsesecvadsueguesensentes 105 7 3 2 Remote Configuration Procedures cceeeceeeeeeeeeees 111 7 4 Remote Configuration and Callback Security AT COMMAS E TT 112 7 5 Remote Configuration Callback Security S Registers 114 Chapter 8 Modem Testing 8 1 Introd ction sorier a AKE 116 8 2 Local Analog Loopback Test V 54 Loop 3 ssssessssssseseseeesse 117 8 3 Digital Loopback Test V 54 Loop 2 Local Manual 118 8 4 Digital Loopback Test V 54 Loop 2 Remote Auto 120 8 5 Back to Bac amp k Vest rises eE E CEEE A 121 8 6 Synchronous Mode Testing sessssssssesssseseseessenessssessssesesses 123 8 7 Local Analog Loopback Test Synchronous Mode 123 SERIES II INTELLIGENT DATA FAX MODEMS 8 8 Digital Loopback Test Local Manual Sync Mode 124 8 9 Digital Loop
57. Series II Modem must have a high DTR signal in order to operate DTR is provided to the modem by the terminal or computer to which it is attached through pin 20 of the RS 232C V 24 interface If your terminal or computer is not providing DTR to the modem you can force the DTR signal high with DIP Switch 1 DTR function normally Switch 1 UP DTR forced On Switch 1 DOWN Factory Default Setting UP CHAPTER 9 DIP Switch Settings Switch 2 Flow Control amp E4 amp E5 Asynchronous Mode Leased Line Dial Up With Hardware Flow Control the modem uses its RS 232C V 24 interface to control the flow of data from the computer or terminal to which it is attached The CTS signal on Pin 5 of the RS 232C V 24 is brought low to stop the flow of data and is brought high to restart it Place DIP Switch 2 in the UP position to enable Hardware Flow Control amp 4 Xon Xoff Flow Control amp E5 is another flow control method Xon Xoff characters in the data dictate the start and stop of data flow from the computer or terminal Place DIP Switch 2 in the DOWN position to select Xon Xoff Flow Control Hardware Flow Control amp E4 Switch 2 UP Xon Xoff Flow Control amp 5 Switch 2 DOWN Factory Default Setting UP Switch 2 SDLC BSC Option Synchronous Mode Leased Line Dial Up Synchronous Data Link Control SDLC and Binary Synchronous Control BSC are two error correction protocols used in the IBM Mainframe environmen
58. Terminal Local Series II Remote Series II Modem Modem I I digital analog analog digital I DIP switch 9 UP Answ Orig switch toggled to Answ position when On line Figure 8 6 Synchronous Mode Digital Loopback Test local manual 8 9 Digital Loopback Test Remote Automatic Synchronous Mode This test must be run when you have a data connection with another modem In this test data is passed to the remote modem and is looped back to the local modem as if an ATU2 command was issued in Asynchronous test mode as shown in Figure 8 7 This lets you test the local and remote modem s transmit and receive circuits as well as your computer s serial COM port and the phone lines If the test results in a mismatch of entered received data multiple upper case U characters SERIES II INTELLIGENT DATA FAX MODEMS in Figure 8 6 the Local Analog Loopback Test should be performed on both the remote and local modems If that test is successful the problem may be the phone lines First make certain that you are set up for Synchronous operation by placing DIP Switch 12 in the UP position To initiate the Digital Loopback Test remote automatic DIP Switch 9 must be in the DOWN position and the Answer Originate switch front of the modem must be toggled to the UP position Once you receive an OK message from your modem if responses are enabled the local modem is placed in Digital Loopback mode To exi
59. The AT Command can also be used to clear the command buffer by simply typing AT and hitting RETURN The letter D in a command causes the modem to dial the numbers immediately following it e g ATD7247465500 You have a choice of either pulse ATDP or tone ATDT dialing methods The Modem responds with CONNECT on your video display after the number is dialed and a connection signal is detected since the Modem defaults to Enhanced V 34 V 42 V 42bis the actual response is CONNECT LAPM COMPRESSED if the Series II Modem connects with a similar modem see section 5 3 Result Code Summary The modem is now in On Line mode and is ready to communicate with a host site If no connection signal is detected within 45 seconds this time period can be adjusted by S Register S7 the Modem goes On Hook hangs up and returns to Command mode At this point your video displays NO CARRIER Enter ATH to Hang Up On Line bring modem on hook and terminate the modem s On Line mode At this point your video displays OR In addition to the call originating capabilities the Modem can also automatically answer incoming calls You need not be present You can however control the situation by configuring the modem to either answer or not to answer or to answer after a specified number of rings This is done by setting the value of S Register SO modem defaults to automatically answer an incoming call after one ring
60. The procedures for using the Remote Configuration features are the same whether or not a call originates from the remote modem Once the modem is on line perform the procedures in Table 7 4 Table 7 4 Remote Configuration Operation Procedures Step Procedure 1 Remote Escape Configuration requires AT lt CR gt to be sent if the default value in S Register S13 has not been changed The modem responds with 1 DATA Mode 2 COMMAND Mode 2 You then select 1 or 2 With 1 the modem goes back into data mode and with 2 the modem responds with the following Password gt 3 Enter your Setup Password and if the code is correct the modem responds with OK You can now use any AT commands of the modem being remotely configured as if they were being entered locally You cannot change the setup of the LOGIN Password until you enter the proper LOGIN Password 4 When you are done entering AT commands and you want to exit type ATO and hit RETURN The modem responds with 1 DATA Mode 2 COMMAND Mode 5 Entera 1 to go back on line with your computer or enter 2 and the correct password to talk to your modem SERIES II INTELLIGENT DATA FAX MODEMS 7 4 Remote Configuration and Callback Security AT Commands The following AT commands are used with Remote Configuration and Callback Security features Assign Passwords for Callback Phone Numbers CBN When you have callback security enabled for the Series II Modem any
61. Transmitter or UART All data from your modem flows through it The UARTs typically used in PC compatible computers are types 8250 8250A 16450 and 16550AFN The 8250 is unreliable above 9 600 bps and the 8250A and 16450 are unreliable above 19 200 bps If the modem sends data to the UARTs above those speeds the UARTs may not be able to process the data fast enough to keep from losing some of it The 16550AFN however can safely handle data to 115 200 bps When a modem communicates with V 42bis 4 to 1 compression en abled it sends up to four times as much uncompressed data to the serial port as it receives compressed over the telephone line Therefore a modem communicating at 14 400 bps may require a serial port that can reliably transfer data at four times 14 400 bps or 57 600 bps at 19 200 bps it may require one that works reliably up to four times 19 200 bps or 76 800 bps and at 28 800 and 33 600 bps it may require one that works reliably up to a maximum of 115 200 bps If your serial port cannot handle these speeds we recommend that you replace your present serial card with one that has a 16550AFN UART or equivalent CHAPTER 3 Software Configuration Macintosh computers do not use UARTs The Macintosh SE through IIfx models use a Zilog Z8530 chip called a Serial Communications Controller or SCC that has a maximum speed of 57 600 bps This speed can be compromised by other serial communications including printer transmis
62. V 25bis operation A Not Allowed A Not Allowed A Not Allowed D Not Allowed D N Not Allowed D Alters Operation D1 in V25bis is direct call mode E Alters Operation amp F Alters Operation removes modem from asynchronous V 42bis mode N Not Allowed N N Not Allowed O Not Allowed P Not Allowed T Not Allowed U Not Allowed W Not Allowed X Alters Operation X0 no connect message X1 connect message Not Allowed Not Allowed Not Allowed Not Allowed 4 AT lt CR gt Not Allowed SERIES II INTELLIGENT DATA FAX MODEMS V 25bis Responses Result Codes When in V 25bis mode the AT V7 command executed your modem provides you with several responses which can help you follow the progress of V 25dis operations These are similar to the Result Codes associated with AT Command mode operation The V 25bis responses are in the form of three character mnemonics as listed below INC Incoming Call same as RING indicator VAL A valid V 25bis command has been attempted DLCt Call delayed for t minutes number on Delayed list CFlrr Call failure indicator where rr equals et Engaged tone same as BUSY nt Call Answered but No Answer Tone ab Call Not Answered fe Number on Forbidden List ns Number not stored in memory ua User Abort nd No Dialtone Jf Forbidden List full LSNmmz dd dd Phone number in V 25bis memory LSD mm dd dd Phone number on the Delay list LSFmm dd dd Phone
63. Xoff characters to pass through to remote site amp E7 Modem responds to Xon Xoff characters and allows them to pass through to remote site X0 Selects single Xoff character until Xon level returns X1 Selects multiple Xoff characters after buffer levels is full Factory default setting SERIES II INTELLIGENT DATA FAX MODEMS Enq Ack Pacing Commands amp E8 Enq Ack method of pacing off amp E9 Engq Ack method of pacing on Normal Mode Modem Flow Control Commands amp E10 Normal Mode Modem Flow Control off amp E11 Normal Mode Modem Flow Control Xon Xoff on Computer or Terminal Initiated Flow Control Pacing Commands amp E12 Pacing off amp E13 Pacing on either RTS on off or Xon Xoff depending on the setting of amp E4 or amp E5 Data Compression Commands amp E14 Data Compression disabled amp E15 Data Compression enabled Factory default setting 5 4 11 Speed Conversion Commands Speed conversion is a necessary part of data compression since data must be presented to the modem faster than it can handle data if data compression is to be effective Speed conversion allows the Series II Modem to communicate at one speed over the phone line and at another speed at the RS232C interface The speed also referred to as data rate or baud rate can be fixed at the RS232 interface independently of the baud rate of the on line transmissions In addition to data compressi
64. a lower rate or replace your serial port with a faster one e Make sure the flow control method you selected in software match es the method selected in the modem If you have a Macintosh you may have the wrong cable for hardware flow control e Ifyou are running under Windows 3 1 and have a 16550AFN UART you may need to turn on the 16550 s data buffers and or replace the Windows serial driver COMM DRV SERIES II INTELLIGENT DATA FAX MODEMS e Try entering the L8 List Online Diagnostics command in on line mode making a screen print of the diagnostics listing and checking for parameters that may be unacceptable number of re trains round trip delay etc Am Getting Garbage Characters on the Monitor e Your computer and the remote computer may be set to different word lengths stop bits or parities If you have connected at 8 N 1 try changing to 7 E 1 or vice versa using your communications software e You may be experiencing line noise Enable error correction if it is disabled or hang up and call again you may get a better connec tion e At speeds above 2400 bps the remote modem might not use the same transmission or error correction standards as your modem Try connecting at a slower speed or disabling error correction With no error correction however line noise can cause garbage characters e Try entering the L8 List Online Diagnostics command in on line mode making a screen print of the diagnost
65. ace the telephone handset in its cradle and your data communications begins Note that the Series II Modem may call manually via the keyboard command ATD or by pressing the Voice Data switch on the modem s front panel downward To force the Modem to automatically answer calls either type ATA or press the Voice Data switch on the modem s front panel upward 4 8 Automatic Answering The Series II Modem can be used as an automatic answering modem No special modifications or settings are required other than making sure that the Auto Answer select switch is set to Auto answer enabled DIP Switch 5 UP The Modem when in its idle state is set for Originate mode frequencies An incoming ring signal automatically switches the modem into Answer mode You can program the modem to answer a call after a certain number of rings using S Register SO see Chapter 6 Refer to Section 4 10 for the handshaking procedures used by the Modem when in automatic answer mode In many originate only applications you may wish to disable the automatic answer capability of the modem If a telephone set is connected to the modem you may wish to receive incoming calls in a voice mode for normal voice conversation If auto answer is not disabled all incoming calls are answered by the modem preventing voice communications To disable automatic answer place DIP Switch 5 to the DOWN Disable Auto Answer position refer to Chapter 9 Another way to disable
66. ake at 2400 to 1200 to 300 bps Factory Default Setting 151 SERIES II INTELLIGENT DATA FAX MODEMS Command _ Values Description amp Bn n O0orl amp BO means normal transmit buffer size amp B1 means reduced transmit buffer size amp BSn n O0orl amp BSO means maximum transmit block size of 64 characters amp BS1 means maximum transmit block size of 256 characters BAn n 0Oorl BA0 means speed conversion is on BA1 means speed conversion is off amp Cn n 0 1 2 4 amp CO forces Carrier Detect on amp C1 lets Carrier Detect act normally amp C2 lets Carrier Detect drop S24 time on disconnect amp C4 resets modem when Carrier Detect drops amp CDn n Oorl amp CDO execute cleardown on disconnect amp CD1 do not execute cleardown on disconnect Ds s phone Dial a telephone number s where s may include up to 60 digits or T P R comma and characters Factory Default Setting Command _ Values Description DsNd s phone Store telephone number To store phone d 0 thru 9 number s is entered and followed by N and then Directory Number d amp Dn n 0 thru 3 amp DO DTR is ignored amp D1 means modem returns to command mode amp D2 lets modem react to DTR normally amp D3 causes modem to reset to modem default parameters APPENDIX C Command Summary DFn n O0orl DFO Line Probe Data in Graph Format DF1 Line Probe Data in Table Format DPn n O0orl DPO
67. al and when the modem turns on its Carrier Detect circuit The default setting is 600 milliseconds six units of 100 mSec each S9 may be set to a maximum of 255 25 5 seconds S10 Carrier Loss Disconnect Delay Time Unit 100 mSec intervals Range 0 255 Default 7 Description S10 sets the time a carrier signal must be lost before the modem disconnects The default setting is 700 mSec seven units of 100 mSec each Maximum delay is 25 4 seconds S10 set to 254 Setting the S10 value to 255 causes the modem to not disconnect with loss of carrier This S Register applies at speeds of 2400 bps and less SERIES II INTELLIGENT DATA FAX MODEMS 11 Tone Dialing Tone Spacing and Duration Unit Milliseconds mSec Range 1 255 Default 70 Description S11 sets the speed of tone dialing spacing and tone duration times The default value is 70 mSec meaning that each tone is on for 70 mSec with a 70 mSec pause between each The minimum S11 value allowed by most telephone systems is 50 mSec Very few telephone systems can handle anything faster than that The maximum S11 value is 255 mSec 13 Remote Configuration Escape Character Unit Decimal equivalents of ASCII characters Range 0 127 Default 37 Description S13 defines the remote configuration escape character which becomes your modem s remote configuration character The default is three percent symbols When the S13 character is entered thr
68. al specifications Chapter 1 includes sections covering power LED indicators and a brief summary of PC board controls Chapter 9 covers switch settings more thoroughly SERIES II INTELLIGENT DATA FAX MODEMS Chapter 2 Installation and Connection Chapter 2 covers the procedure for connecting the Series IT Modem to your computer and to the phone line Details are given supported by illustrations on the Modem s back panel connections as a guide to install your Modem to the point of operation Chapter 3 Software Configuration Chapter 3 documents communication software configuration recommended specifically for the Series II Modem There is also some discussion of how to identify the limitations and capabilities of your computer before the software installation process is done Other issues covered include setting up initialization strings changing default parameters configuring software for the remote system and file transfer protocols Chapter 4 Manual Dial and Automatic Answer This chapter covers some modem operations but delays discussion on Command Mode operation until Chapter 5 Automatic Leased Line Restoration Dial backup Manual Dial Mode and Answer Mode opera tion are covered in detail as well as the handshaking procedures employed between two modems in an auto answer application Chapter 5 AT Command Mode Operation This may be the most important chapter of this manual It begins with an introduction and dis
69. also a Local Analog Loopback Test documented in section 8 7 8 7 Local Analog Loopback Test Synchronous Mode This test diagnoses the connection between your Series II Modem and your computer or terminal In Local Analog Loopback Test mode data entered at the local computer or terminal are sent through the local modem s transmit and receive circuits much like entering an ATU or ATU1 command in Asynchronous mode You then compare the test characters multiple upper case U characters in Figure 8 5 on your monitor with the characters you typed If the characters don t match check your computer s COM port setting then verify your communication software s configuration SERIES II INTELLIGENT DATA FAX MODEMS To initiate the Local Analog Loopback Test with the modem in Synchronous mode 1 Enter AT amp M1U This first switches your modem form asynchro nous to synchronous mode and places it into the Analog Loop back Originate mode The modem is now out of the Command mode and in the pseudo On Line mode 2 Once you receive a connect message if responses are enabled enter data from your keyboard For this test typing multiple upper case U characters is a good way to send an alternating test pattern of ones and zeros 3 For amore complete test you should also test the modem in Answer mode To do this Type the Escape Sequence 4 AT lt CR gt or lt BREAK gt AT lt CR gt which brings your modem into Command
70. also specified by country reg ulations In some countries the time might be one hour and in others the number may never be dialed again The forbidden list is eight num bers long with the newest number replacing the oldest if the memory is full To list the numbers in the Forbidden list enter RLF and hit RETURN Disregard or Connect to Incoming Calls DIC or CIC Command The Disregard or Connect to Incoming Calls commands are used for Auto Answer operations Depending on the country regulations your modem will wait some amount of time or number of rings before an swering the call During that time you can stop the modem from answering the call by entering the DIC Disregard Incoming Calls command The CIC Connect to Incoming Calls command will cause your modem to answer the call either reversing the effect of a DIC SERIES II INTELLIGENT DATA FAX MODEMS command or simply have your modem answer the call immediately without waiting the regulation time before answering DTR Dialing D Command DTR Dialing is an alternate method of causing the Series II Modem to automatically dial a number Data Terminal Ready DTR is a signal that comes into the modem from the terminal or computer to which it is connected via pin 20 of the RS232 interface In DTR Dialing the modem will automatically dial a stored number as soon as it receives a high DTR signal The DTR Dialing method is popular when using the Modem in synchronous application
71. and Mode Remember nearly all commands begin with AT These commands are organized into several functional groups An al phabetical summary of commands is provided in Appendix D HOW TO COMMANDS DIAL D Dial A or Continuous Redial D DTR Dialing VD Voice Data Dialing N Dial a Stored Number MODIFY DIALING P T Pulse Tone Dialing PROCEDURES amp P Set Pulse Dial Ratios A Automatic Pauses in dialing Y Long Space Disconnect wW Wait for New Dial Tone CHAPTER 5 Command Mode Return to Command Mode After Dial a Command R Reverse Mode of Operation Flash On Hook AT amp T Calling Card Tones Quiet Answer MEMORIZE PHONE NUMBERS D N Store Phone Numbers NN Number Linking L List Numbers Stored in Memory STORE MODEM amp F Load Factory Defaults CONFIGURATIONS amp W Store Configuration amp S Register AND DEFAULTS Parameters Z Reset Modem SP UNIX Spoofing V 336 MD1641A only Enable Disable V 32 terbo amp M Synchronous Asynchronous Mode Select amp X Synchronous Transmit Clock Select CONFIGURE Q Result Codes Enable Disable COMMAND Response RESPONSES amp Q Result Code Selection E Echo Command Characters V Result Code Terse Verbose X Result Code Basic Extended Call Progress CONDITION amp G Guard Tones PHONE LINE M Enable Disable Monitor Speaker AND MODEM amp T Remote Digital Loop Signal HARDWARE T Enable Disable Trellis Coded Modulation F Fallback When On Line FC 336 MD1640A only E
72. ands can be used together to cause the modem to buffer all data received up until the CARRIAGE RETURN and then drop to Normal mode All data received will then be output following the CONNECT message AT FO0 Do not fall back to Normal if CARRIAGE RETURN received AT F1 Fall back to Normal mode if CARRIAGE RETURN received The factory default is FO Retransmit Count R If errors are received during a Reliable connection the modem re sends the block of data which contained an error With the RO command if another error occurs the block will be re sent again The modem counts the number of times that a data block is re sent If the same block of data is resent 12 times and still has not been received properly the modem assumes that the transmission line is unsuitable for transmission and abort the connection This retransmit counter is disabled by the R1 command When the retransmit counter is disabled the modem keeps trying to send data and will not abort no matter how many times the same block is resent AT R0 Disconnect if retransmit count is exceeded AT R1 Do not disconnect due to retransmits The factory default setting is RO CHAPTER 5 Command Mode V 42 Error Correction 300bps E At 300 bps error correction is not typically used E1 lets the Series II Modem function at 300 bps in either Normal amp E0 Auto Reliable amp E7 or Reliable amp E2 mode E0 which is the Modem s default disable
73. apse for Escape Sequence Unit Seconds Range 0 255 Default 20 Description S32 sets the time period to validate the escape sequence If the time interval expires before the escape sequence is employed by hitting RETURN the escape sequence is aborted The default time is 20 seconds 34 Buffer Length of Command Mode After On line Escape Sequence Unit ASCII characters Range 0 60 Default 10 Description If the number of characters after AT exceeds the S34 buffer length value the buffer is cleared and the escape sequence is aborted CHAPTER 6 S Registers S36 Time Between DTR Inactive and Modem Off Hook Unit Seconds Range 0 255 Default 0 Description The DTR Busy out feature uses S Register S36 to set the time between DTR inactive low and the modem going off hook S36 can be set in one second intervals from 0 to 255 seconds With the default setting of S36 0 DTR Busy Out is disabled i e DTR won t Busy Out S37 Time Between DTR Active and Modem On Hook Unit Seconds Range 0 255 Default 5 Description S37 sets the time between DTR being active and the modem going on hook not busy S37 will only function in conjunction with S36 S48 Program V 34bis Connect Speeds Unit N A Range 33 31 28 26 24 21 19 16 14 12 96 or 48 Default 0 Description Defines which speed modem connects within the scope of Enhanced V 34 mode e g if S48 is set to 26 the maximum connect speed will be
74. ay Remote Configuration works is that S Register S13 has been set up to contain the special Remote Configuration escape code When calling a Remote Configuration equipped modem you enter the proper Remote Escape code to enable entering your Set up Password After entering it you can then execute AT commands as if you were connected locally If you set S Register S13 to zero Remote Configuration is disabled 7 3 1 Initial Setup Procedures for Callback and Remote Configuration Your modem was shipped with a default LOGIN Password and Setup Password LOGIN BLACK BOX and Set up MODEMSETUP so that you have access to the features used for configuring the modem Because the defaults are in the modem owner s manual and anyone can find out what they are you should change the codes as the first step of your initialization procedure SERIES II INTELLIGENT DATA FAX MODEMS Table 7 1 Modem LOGIN Setup and Remote Escape Code Procedures To change your modem s LOGIN Password and Setup Password Step Procedure Note Passwords are upper lower case sensitive The case you enter here is the case that must be used at Log In 1 Type AT IBLACK BOX and hit RETURN Your modem will respond with OK if the LOGIN Password is wrong the modem s response is ERROR 2 Type AT SMODEMSETUP and hit RETURN Your modem will re spond with the following OK or ERROR if wrong Setup Password Note At this point you can change the LOGIN Passwor
75. back Test Remote Auto Sync Mode 125 Chapter 9 DIP Switch Settings 9 1 Introd ct ona iae a REE ER S 127 9 2 DIP Switch Option Settings 0 0 cece cesses ceeeeeeeeeeees 128 9 3 Speaker Volume Control ou cee eceeeecsseesecssesscnsesesseeees 136 9 4 Recording Option Configurations se ssssesssssssssessesesereesee 137 Appendix A Troubleshooting A l Possible Causes and Solutions cccccseccssseseeeeeeeneeneenes 139 A 2 Contacting Black Box wo ececseseesesseseseeesseeeesseeeeesneneens 147 A 2 1 Recording Modem Information cee 147 A22 Makino the Call cccicsisiccciscecdscovessipstveveccecesestnguecensentys 148 A3 Shipping and Packaging cee ecceseesscseeeeeceesecseesseseseees 148 AA Upgrading the Series II Modem s Firmware 0000 149 Other Appendixes Appendix B Dial Pulse and Tone Dial Frequencies 0 150 Appendix C Command Summary cccccscesseseeerscnseseeeeeeeneeeenes 151 Appendix D DIP Switch Summa fy cccccseseeeseerseteeeeeeeneeeenes 164 Appendix E S Register Summary cece cece ese eeereseneeeeeneeaens 167 Appendix F Result Code Summary ccccccsecscrseteeeeeseneeneenes 171 Appendix G V 25bis Operation eee ee eee eeeeeeesenseeeeneesens 174 Appendix H Series II Modem Cables ccceieeeeseeeseeneeseees 187 Appendix I RS232C Interface Specifications 2 0 0 scenes 189 Appendix J Regulatory Information cccccccse
76. be converted to digital data be reconvert ed into analog and then looped through its transmitter back to the local modem Your modem passes this test if the data entered from the local keyboard is the same as the data received on your monitor 8 5 Back to Back Test This test lets you connect two Series II Modems with an RJ11 cable to verify proper operation See Figure 8 4A on the next page Using a Series II Modem that is known to be operational you can test a second Modem that is suspect 1 Plug the modular ends of an RJ11 cable into both Modems LEASE jacks 336 models or LINE jacks 336 models 2 Force DTR ON in both local and remote modems Switch 1 DOWN 3 Enter the command AT SB9600 BA0 amp W0 lt CR gt on both local and remote modems This sets the serial speed to 9600 bps Make sure that the terminal computer is also set for 9600 bps 4 Set both modems in Leased Line mode DIP Switch 10 DOWN Set one Series II Modem to Answer enabled DIP Switch 5 UP and the other Modem to Originate enabled DIP Switch 5 DOWN Note that it does not matter which modem local remote is set to Answer Originate just so they are set opposite SERIES II INTELLIGENT DATA FAX MODEMS 6 Set DIP Switch 3 UP on both local and remote modems This changes the transmit level to 15dB and this change is necessary to operate in back to back mode Turn on both units and wait for carrier detect CD Short out pins 2 and 3
77. be used to reset the entire Command Mode buffer and the result is the same as if you had disconnected and then reconnected power to the modem When an ATZ command is executed the state of the amp W command determines where the default values originate amp W0 defaults come from RAM and amp W1 defaults come from ROM Unix UUCP Spoofing SP The Series II Modem can be configured in a Unix environment that employs ACK flow control as a means of monitoring data integrity The Modem can do UUCP spoofing where the modem is able to generate ACKs at the DTE interface Data is transmitted more time efficiently because the delay of waiting for data to be received then for an ACK to be returned at the remote end is eliminated The SP1 command enables UUCP spoofing and the default command SP0 disables UUCP spoofing V 32terbo Enable Disable V 336 Only Other types of V 32 V 32bis modems have problems handshaking when the Series II Modem 336 MD1641A includes V 32 erbo mode 19 200 bps in its handshaking process The bits that are used in the rate sequence for V 32terbo can cause handshaking failure The V command gives the user the option of including V 32 erbo as part of the handshaking process in both Orignate and Answer modes Entering AT V0 amp W0 lt CR gt includes the V 32terbo mode in handshaking Entering AT V1 amp W0 lt CRp gt disables the Series II Modem 336 from using V 32terbo mode in the handshaking process defau
78. bis V 42 Pending ITU Enhanced V 34 approval ITU V 34 ITU V 32bis V 32 V 22 bis V 22 V 25bis Bell 212A and 103 113 ITU V 17 Group 3 T 4 T 30 and EIA TR 29 Class 2 Error Correction V 42 LAP M or MNP 3 amp 4 error correction Data Compression V 42bis 4 1 throughput or MNP 5 2 1 throughput data compression Speed Conversion Serial port data rates adjustable to 300 1200 2400 4800 9600 19 200 38 400 57 600 and 115 200 bps Flow Control Xon Xoff Hardware RTS CTS ENQ ACK Options Unix to Unix Copy Protocol UUCP Spoofing Mode of Operation Intelligent Features Command Buffer Modulation Fax Modulations CHAPTER 1 Introduction and Description Full duplex over both dial up lines and 2 wire or 336 MD1640A only 4 wire leased lines automatic or manual dialing automatic or manual answer and 336 MD1640A only automatic dial backup on separate lines in leased line operation Fully AT command compatible micropro cessor controlled remote configuration EIA extended Automode adaptive line probing automatic symbol rate and carrier frequency during start up retrain and rate renegotiation autodial redial repeat dial dial linking pulse or tone dial dial tone detection dial pauses call status display auto parity and data rate selection keyboard controlled modem options nonvolatile memory and on screen displays for modem option parameters and up to ten telephone numbers com
79. ble to detect the dial tone Return to Command Mode after Dial Command Execution A semicolon entered as the last character of a dialing command causes the Series II Modem to return to the Command mode immediately after executing the command instead of waiting for a carrier signal and going on line For example entering ATDT5551212 would tone dial the number and do nothing afterwards except go back into Command mode This can be useful in dialing applications where modem data transfer is not desired such as voice communications or in applications involving the use of touch tones as a data entry method such as bank by phone Reverse the Mode of Operation R In certain operations you may need to reverse the mode of operation for your modem from originate to answer or answer to originate so that it would answer the phone and go into answer mode This command turns off the reversing function with the RO command and turns it on with the R1 command with the modem in either command mode If you want to reverse from the originate mode use R with no number in the dialing string CHAPTER 5 Command Mode Flash On Hook Some switchboard systems react to a momentary On Hook An exclamation mark inserted in the command causes the modem to flash on hook for a half of a second as if you had held the switch hook button on a telephone down for a half second For example to flash On Hook after dialing the number 555 1234 i
80. by you Repairs are to be made only by Black Box Unauthorized repairs void registration and warranty 8 This equipment cannot be used on public coin service provided by the telephone company Connection to Party Line Service is subject to state tariffs Contact the state public utility commission public service commission or corporation commission for information 9 Ifso required this equipment is hearing aid compatible Trade Names Series II Modem 336 and 336 Model Number Series II Modem 336 MD1641A Series II Modem 336 MD1640A FCC Registration AU7USA 20673 MM E Ringer Equivalence 0 3B Modular Jack USOC RJ11C or RJ11W single line Service Center in USA Black Box Corp 1000 Park Dr Lawrence PA 15055 1018 U S A Phone 724 746 5500 Fax 724 746 0746 Email info blackbox com WWW www blackbox com APPENDIX J Regulatory Information Canadian Limitations Notice Notice The ringer equivalence number REN assigned to each terminal device provides an indication of the maximum number of terminals allowed to be connected to a telephone interface The termination of a interface may consist of any combination of devices subject only to the requirement that the sum of the ringer equivalence numbers of all the devices does not exceed 5 Notice The Industry Canada label identifies certificated equipment This certification means that the equipment meets certain telecommu nications network protective operatio
81. ce Data Dialing VD1 enables Voice Data Dialing Vn n 0orl VO means Result Codes sent as digits terse response V1 means Result Codes sent as words verbose response Vn n 0Oorl V0 enables V 32terbo handshaking process V1 disables V 32 terbo handshaking process WwW In Dial Comd Wait for new dial tone amp Wn n O0orl amp WO causes modem to store its current parameters in non volatile RAM and modem will load these for future sessions instead of reading factory ROM defaults unless amp F command used amp W1 causes modem to not store parameters Factory Default Setting 336 Model MD1641A Only 159 SERIES II INTELLIGENT DATA FAX MODEMS Command _ Values Description Xn n 0 1 2 3 or 4 X0 selects Basic Result Codes w o CONNECT 1200 CONNECT 2400 X1 selects Extended Result Codes w CONNECT 1200 CONNECT 2400 X2 selects Standard AT Command set with NO DIAL TONE X3 selects Standard AT Command set with BUSY X4 selects Standard AT Command set with NO DIAL TONE and BUSY amp Xn n 0 1 or2 amp X0 has sync clock controlled by DIP switch amp X1 forces external sync clocking amp X2 forces slave sync clocking Xn n 0orl X0 selects single XOFF character sent until XON level returns X1 selects multiple XOFF characters after buffer level is full Yn n 0orl Y0 disables sending or responding to In Dial Command long space break Y1 enables sending or responding to long space br
82. checked when APPENDIX G V 25bis Operation dialing in AT mode If dialing is not possible then NO CARRIER is the response c Auto Answer behavior 1 Auto Answer in 5 seconds if no DIC 4 France a Command Indication modification none b Delay and Forbidden list behavior 1 2 min delay after Ist call 4 after 2nd 6 after 3rd etc 2 After 5 retries the number is put on the forbidden list 3 The number remains on the forbidden list forever 4 Delayed and Forbidden Numbers lists are checked when dialing in AT command mode If dialing is not possible then No Carrier is the response c Auto Answer mode behavior 1 Auto Answer in 5 seconds if no DIC 5 Belgium a Command Indication modification none b Delay and Forbidden list behavior 1 1 min delay between calls 2 After 4 retries the number is put on the forbidden list 3 The number remains on the forbidden list for 1 hour after entry to forbidden list 4 Delayed and Forbidden Numbers lists are checked when dialing in AT command mode If dialing is not possible then No Carrier is the response c Auto Answer behavior 1 Auto Answer in 5 seconds if no DIC SERIES II INTELLIGENT DATA FAX MODEMS 6 Singapore a Command indication modifications 1 Dialing digit means wait for dialtone acts the same as in dialing string b Delay and Forbidden list behavior 1 5 retries without delay 2 2 minute delay between next 4 retries 3 After
83. command string See the section on Dial Modifiers You can also configure the modem to either wait for and detect dial tones and busy signals which we call Wait for Dial Tone dialing or Smart dialing or work with timed pauses without dial tone and busy signal detection which we call Blind dialing see Section on X Command Note There is another method of dialing called DTR Dialing where by manipulating the DTR signal on pin 20 of the RS 232C V 24 interface a number stored in the modem s memory is automatically dialed See the section on the DTR Dialing D command for details Continuous Redial A or If you select the Wait For Dial Tone method of dialing see X3 or X4 command you can command the Series IT Modem to continuously redial a busy number until your call is answered This is done with the A command CHAPTER 5 Command Mode This command would be used only if you had already reached a busy number after executing a normal dial command You simply enter A you need not enter AT nor do you need to hit RETURN and the modem will redial the number for you If you again reach a busy signal it re dials again and again until it no longer detects a busy signal You can stop the Series II Modem from re dialing by pressing any key Another method used to cause the modem to redial a phone number continuously is to enter a colon at the end of the phone number The result is the same a
84. connected to the telephone line Excessive REN s on the telephone line may result in the devices not ringing in response to an incoming call In most but not all areas the sum of the REN s should not exceed five 5 0 To be certain of the number of devices that may be connected to the line as determined by the total REN s contact the telephone company to determine the maximum REN for the calling area 4 Ifthis equipment causes harm to the telephone network the tele phone company will notify you in advance But if advance notice isn t practical the telephone company will notify the customer as soon as possible Also you will be advised of your right to file a complaint with the FCC if you believe it is necessary 5 The telephone company may make changes in its facilities equip ment operations or procedures that could affect the operation of the equipment If this happens the telephone company will provide advance notice in order for you to make necessary modifications in order to maintain uninterrupted service SERIES II INTELLIGENT DATA FAX MODEMS 6 If trouble is experienced with this equipment the model of which is indicated below please contact Black Box at the address shown below for details of how to have repairs made If the trouble is causing harm to the telephone network the telephone company may request you remove the equipment from the network until the problem is resolved 7 No repairs are to be made
85. cussion on Command Mode fundamentals A flow chart is provided to illustrate Command Mode and On Line Mode operation and the methods used in each mode Next there is a summary of the modem s commands and responses We then go into a detailed explanation of each Series II Modem command providing examples where applicable Chapter 6 S Registers Chapter 6 covers the Series II Modem s S Registers which enable the user to establish read and modify various modem options All of the S Registers are charted and explained followed by instructions on accessing the S Registers and reading or changing their values CHAPTER 1 Introduction and Description Chapter 7 Callback and Remote Configuration Chapter 7 documents instructions on how to operate the Series II Modem s Callback and Remote Configuration features and the usage of LOGIN Passwords Set Up Passwords and Remote Escape Characters as network management tools Chapter 8 Testing Your Modem This Chapter covers the modem s built in test features These are Power on Self Test Back To Back Test Local Analog Loopback Digital Loopback and Remote Digital Loopback Tests We have included a description of each test and how to use each test procedure Chapter 9 DIP Switches The Series II Modem printed circuit board options are covered in this chapter Sixteen DIP Switch settings and the modem s speaker volume control are explained in detail including all default setting
86. d The BACKSPACE key erases the previous character for reentering The BACKSPACE key does not erase the AT characters once they are entered If your keyboard has no BACKSPACE key CTRL H does the same thing The character recognized by the modem as BACKSPACE may be changed to any other ASCII character with S Register S5 If you wish to cancel an entire command that has been entered but not yet executed enter CTRL X This also clears the command buffer The effect is the same as backspacing to cancel the entire command only quicker Characters entered in a command are stored in the modem s Com mand Buffer memory until executed by hitting RETURN The Command Buffer s capacity is sixty characters The Attention Characters AT do not count in the sixty allowed Command characters Spaces which may be used for increased display readability may be used when entering a command but are not stored in the Command Buffer and are not counted in the sixty allowed characters Hyphens parentheses etc are not allowed If the sixty character limit is exceeded or if invalid characters are entered the Command Buffer automatically erases and an ERROR message appears You would then re enter your command within the sixty character maximum using only the allowed characters CHAPTER 5 Command Mode 5 1 2 Functional Modes The Series II Modem can be in one of two functional states see Figure 5 1 These are Command mode and On line mode The
87. d more than one comma may be entered consecutively with each comma causing a two second pause You also have the option of changing the length of the pause caused by the comma from two seconds to any other value from 0 up to 255 seconds This is done by setting S Register S8 refer to Chapter 6 Each comma in a dialing command counts as one of the sixty allowed characters Long Space Disconnect Y When two modems are connected in Normal mode that is without error correction there is no polite means of requesting a disconnect A link disconnect request packet is sent under reliable connections As a result some garbage may be received when a hang up command is issued The Y1 command enables the modem to use the break signal which accomplishes the hang up as an instruction to shut off its receiver and disconnect both modems must have Y1 enabled for this feature to be effective YO factory default disables this function SERIES II INTELLIGENT DATA FAX MODEMS Wait for New Dial Tone W A Winserted in the dialing command causes the Series II Modem to wait for another dial tone and not resume dialing until another dial tone is detected It is not necessary to enter a Wat the beginning of the dialing command to wait for a modem dial tone because the modem will do that first pause automatically In order for this command to work you must select Wait For Dial Tone dialing with the X2 or X4 command so that your modem will be a
88. d and Setup Password 3 Type AT I XXXXXXXXXX with any keyboard characters used minimum 6 maximum 10 and hit RETURN Your modem responds with OK 4 Type AT S yyyyyyyyyy with keyboard characters used minimum 6 maximum 10 and hit RETURN Your modem responds with OK To change your Remote Configuration feature status 5 Ifyou want Remote Configuration off set S Register 13 to 0 zero Refer to Chapter 6 for details on how to set S Register values 6 Ifyou want Remote Configuration on and wish to change the Remote Escape Character change the S Register S13 value If you leave it at the default value decimal 37 sign will be your modem s remote escape character CHAPTER 7 Callback Security and Remote Configuration To turn your modem s Callback Security feature on and off 7 Ifyou want Callback Security with both remote and local password security enter AT DB1 and hit RETURN You must turn on Callback Security to be able to enter dial back phone numbers 8 Ifyou want Callback Security on with just remote password security enter AT DB2 and hit RETURN You must turn on Callback Security to be able to enter dial back phone numbers If you want to use your modem to call another modem that is also set for Callback you must enter AT DB3 before you dial Note This is for your modem if you are set for DB1 or DB2 Once you have disconnected from that call your modem will go back to its original setting
89. d in the Series I Modem lets you load these upgrades into the PROM or DSP chips through the modem s serial port Ifa Black Box Tech Support technician tells you that you need to upgrade your firmware do so taking these steps 1 Follow the technician s instructions for downloading FLASHPRO ZIP and a new HEX file from Black Box 2 Unzip the FLASHPRO ZIP file Place this unzipped file and the HEX file in the same directory 3 Run FlashPro by typing FLASHPRO a space M and hitting ENTER at the DOS prompt 4 Highlight the Configure option in the MAIN MENU and hit ENTER Highlight Active Port and select the COM port to which you have your modem attached Highlight Baud Rate and select the rate you want to program at Hit ESC when finished 5 Highlight the Select File to Program option in the MAIN MENU Highlight the HEX file Hit ESC when finished 6 Highlight Program Firmware option in the MAIN MENU When you are prompted to confirm the file to program press Y 7 Ifyou need more assistance programming FLASHPRO then contact our tech support department again SERIES II INTELLIGENT DATA FAX MODEMS Appendix B Dial Pulse and Tone Dial Frequencies Dial Pulses Closed B A Open Digit 2 Digit 1 In the example above the digit 2 is pulse dialed followed by the digit 1 Each pulse consists of an A mSec open and a B mSec closed where A will be either 60 or 67 mSec and B will be either 40 or 33 mSec for a t
90. de In Synchronous mode you may want to set the RTS forcing and CTS forcing DIP Switches so that both of signals act normally not forced on Switch 12 UP Switch 12 DOWN DOWN Synchronous Operation Asynchronous Operation Factory Default Setting Switches 13 and 14 Speed Switches Synchronous Mode Leased Line DIP Switches 13 and 14 are used to set the Series II Modem s data transmission rate Switches 13 and 14 are used in combination typically in leased line and call origination applications Note that the modem baud rate command MB33600 overrides the setting of these speed selection switches DIP switches 13 and 14 28800 bps Operation Switch 13 UP and Switch 14 UP 19200 bps Operation Switch 13 DN and Switch 14 UP 14400 bps Operation Switch 13 UP and Switch 14 DN Switch 13 DN and Switch 14 DN Switch 13 UP and Switch 14 UP 9600 bps Operation Factory Default Setting Switch 15 Carrier Detect DSR Forcing DSR Asynchronous Synchronous Mode Dial Up Leased Line Some terminals react in unusual ways to the toggling of the Carrier Detect CD RS 232C V 24 pin 6 signals The most common symptom is that the modem does not respond to commands or does not echo characters In these cases it is advisable to force these two signals On in order for the terminal to communicate properly with the modem in SERIES II INTELLIGENT DATA FAX MODEMS Command mode This is done by setting DIP Switch 15
91. dixes Appendix A Troubleshooting Your Series II Modem was thoroughly tested at the factory before it was shipped If you are unable to make a successful connection or if you experience data loss or garbled characters during your connection it is possible that the modem is defective However it is more likely that the source of your problem lies elsewhere Problems you may encounter include the following e None of the LEDs light when the modem is on e The modem does not respond to commands e The modem dials but is unable to make a connection e The modem disconnects while on line e The modem cannot connect when answering e File transfer is slower than it should be e Iam losing data e lam getting garbage characters on the monitor e Ican t run my fax and communications software at the same time If you experience problems please check the possibilities in Section A 1 before calling Tech Support see Section A 2 A 1 Possible Causes and Solutions None of the LEDs Light When the Modem Is On When you turn on the Series IT Modem the LED indicators on the front panel should flash briefly as the modem runs a self test If the LEDs remain off the modem is probably not receiving power e Make sure the modem s power switch is on especially if you nor mally turn on the modem by turning on a power strip e Ifthe power supply is plugged into a power strip make sure the power strip is plugged in and its power switch
92. do not read Line Probe Information from DSP during handshaking DP1 read Line Probe Information from DSP during handshaking Dn n Oorl D0 disables DTR Dialing D1 enables DTR Dialing En n 0Oorl EO means do not echo Command Mode Character E1 means do echo Command Mode characters Factory Default Setting Command _ Values Description amp En n 0 thru 15 amp E0O means no error correction amp El means V 42 Auto reliable Mode amp E2 means V 42 Reliable Mode amp E3 means no modem initiated flow control amp E4 means CTS modem initiated flow control amp E5 means Xon Xoff modem initiated flow control amp E6 means Xon Xoff not passed through amp E7 means Xon Xoff passed through amp E8 means Enq Ack pacing off amp E9 means Enq Ack pacing on amp E10 means Normal Mode flow control off amp E11 means Normal Mode flow control on amp E12 means Pacing off amp E13 means Pacing on amp E14 means data compression disabled amp E15 means data compression enabled SERIES II INTELLIGENT DATA FAX MODEMS En E0 disables error correction at 300 bps E1 enables Autoreliable Mode at 300 bps E2 enables Reliable Mode at 300 bps EBn n Oorl EBO enables 10 bit mode EB1 enables 11 bit mode En n 0 thru 5 EO Modem Won t Escape El Method default setting E2 Break Method E3 Either or Break Method E4 No OK Response to E5 OK Response to
93. documentation should list the ones it can use not all communications programs support all protocols Zmodem is the recommended protocol for most transfers 3 7 When to Disable Data Compression If your serial port cannot keep up because it has an older UART you may lose data when using data compression Also the speed advantage hardware compression gives you is entirely dependent on how much the data being transmitted can be compressed If the data is already in compressed form a ZIP or a SIT file for example trying to com press it more will actually slow the transmission slightly compared to transmitting the same file with compression disabled This effect will be most noticeable if your modem negotiates MNP 5 compression with the other modem V 42bis will not try to further compress a compressed file but MNP 5 will SERIES II INTELLIGENT DATA FAX MODEMS The command to disable compression is AT amp E14 lt CR gt If you have an older UART or if you use your modem mostly for downloading long compressed files from BBSs you may want to include the amp E14 command in your initialization string as follows AT amp F S0 0 X4 amp E14 M As a general rule you should try to transmit files in already compressed form rather than relying on V 42bis hardware compression Because software compression is more efficient than hardware compression you will have a higher throughput with the former Of course this efficiency does not i
94. e different ways the Modem falls back During operation if the error rate becomes too great the modem performs a retrain If after the retrain the error rate is still too high for 33600 bps operation the modem initiates a retrain at 4800 bps If after the first retrain the modem returns on line at 33600 bps the modem then starts a counter and a timer If three retrains occur within a two minute period the modem falls back to 4800 bps Entering AT FO or AT F allows no fallback when on line AT F1 allows the Modem to fallback based on the error rate or if three retrains have occurred within a two minute period from 33 6K to 31 2K to 28 8K to 26 4K to 24K to 21 6K to 19 2K to 16 8K to 14 4K to 12K to 9 6K to 4 8K bps The AT F2 command enables incremental fall back from 33 6K to 4 8K but also enables incremental fall forward from 4 8K to 33 6K if the phone line improves AT F2 is the factory default setting Enable Disable Lowspeed Fast Connect FC 336 Only With the Series IT Modem 336 MD1640A entering AT FCO amp WO0 lt CR gt sets up the data pump so that it will not transmit a 5 second 2100 Hz signal Entering AT FCO amp W0 lt CRp gt allows the modem to transmit a 5 second 2100 Hz signal and is the factory default Cleardown at Disconnect amp CD The amp CD command is used for control of cleardown at disconnect in V 32 V 32bis V 34 and V 34 enhanced modes A cleardown usually adds 1 2 seconds to the time it takes for
95. e following S Registers are used with Remote Configuration and Callback Security features Remote Configuration Character S13 S13 defines the Series II Modem remote configuration escape character When the S13 character is entered three consecutive times from a remotely connected site your modem responds to it with its Remote Configuration procedure Units Decimal equivalents of ASCII characters Range 0 127 Default 37 sign Callback Time Delay S15 S15 defines the time delay for Callback attempts after initial passwords have been exchanged between modems Unit Seconds Range 10 255 Default 20 Callback Attempts S16 S16 defines the number of Callback attempts after initial passwords have been exchanged between modems Unit Attempts Range 1 255 Default 4 CHAPTER 7 Callback Security and Remote Configuration Failed Password Attempts S26 S26 counts the number of times there has been a failed password attempt For example if you entered ATS26 and the message 003 were displayed that would mean someone had failed three times to gain access to your modem using its password security system Units Failed attempts Range 0 255 Default 0 Local Inactivity Timer S29 S29 defines the amount of idle time that can elapse between AT com mands after the SETUP password has been entered If this timer expires the LOGIN and SETUP passwords will have to be re entered S29 only takes effect when the m
96. e to verify proper modem operation In asynchronous mode upon completion of testing enter either Escape Sequence AT lt CR gt or lt BREAK gt AT lt CR gt Note All loopback tests will operate at all speeds except 300 bps Disable error correction amp E0 amp W0 lt CR gt before engaging in loopback tests self test and back to back test not affected CHAPTER 8 Modem Testing 8 2 Local Analog Loopback Test V 54 Loop 3 In this test data from your computer or terminal is sent to your modem s transmitter converted into analog form looped back to the receiver converted into digital form and then received back at your monitor for verification No connection to the phone line is required See Figure 8 1 Computer or Terminal Local Series II Modem digital i analog Type ATUO or ATUT hit ENTER Figure 8 1 Local Analog Loopback Test The test procedure is as follows 1 Connect the modem to your computer With your communication software set the desired baud rate 2 Type ATUO or ATU and hit ENTER This places your modem in Analog Loopback mode in the Originate mode The modem is now out of the Command mode and in a pseudo On Line mode 3 Once you receive a connect message if responses are enabled enter data from your keyboard For this test typing multiple upper case U characters is a good way to send an alternating test pattern of ones and zeros 4 For a more complete test you should also
97. eaks Z All configuration parameters are reset to default values In Dial Command Causes pause during dialing 7 In Dial Command Causes return to Command Mode after dialing In Dial Command Causes modem to flash On Hook In Dial Command Causes modem to wait for ringback then 5 seconds of silence before processing next part of command Factory Default Setting APPENDIX C Command Summary Command Values _ Description AT lt CR gt In band Escape Sequence Places modem in Command Mode while still remaining On Line Enter followed by the letters A and T up to ten command characters and a RETURN BREAK AT lt CR gt Out of band Escape Sequence Places modem in Command mode while still remaining On Line Enter a BREAK signal followed by the letters A and T up to sixty command characters and hit RETURN Callback Security Remote Configuration Command Summary Command Description DBn DBO disables Callback Security and answering Yes to the prompt turns off Callback Security and erases stored phone numbers and passwords Answering No to the prompt aborts the command DB1 activates remote and local password security DB2 activates remote password security CBNyyxxxxxx Callback password with xxxxxx being callback password and yy being the memory location Callback password xxxxxx must start with a non numeric character and upper lower case sensitive Callback password xxxxxx must be a mini
98. eas you can disable call waiting by preceding the telephone num ber with 70 check with your local telephone company You can automatically disable call waiting by including the disabling code in the modem s dial prefix e g ATDT 70 note the comma which inserts a pause before the number is dialed To change the dial prefix in Windows Terminal select Settings Modem Commands To change it in Windows 95 HyperTerminal select Call Connect from the menu bar click Dialing Properties check this location has Call Waiting and select the correct code for your phone service e Ifyou have extension phones on the same line as your modem you or someone else can interrupt the connection by picking up anoth er phone If this is a frequent problem disconnect the extension phones before using the modem or install another phone line es pecially for the modem Check for loose connections between the modem and the computer the telephone jack and AC power e You may have had a poor connection because of line conditions or the problem may have originated on the other end of the line Try again e Ifyou were on line with a BBS it may have hung up on you because of lack of activity on your part or because you exceeded your time limit for the day Try again The Modem Cannot Connect When Answering e Auto answer may be disabled Turn on auto answer in your data comm program or send the command ATSO 1 to your modem in terminal mode
99. ed setting In order for this command to be effective the modem s Speed Conversion feature must first be turned off with the BA command When Baud Adjust is on the Modem automatically adjusts its serial port baud rate to match the speed of the computer or terminal it is connect ed to as soon as it receives its first AT command However in many ap plications such as automatic answer the modem may not receive AT commands in which case it is very useful to be able to preset the serial port baud rate with this SB command In addition to setting the Modem s serial port speed this command also sets the speed at which the modem issues Command mode responses The Modem will accept AT commands at any speed regardless of the speed preset by the SB command If the modem receives such a com mand at a speed that is different than the preset speed the modem switches its serial port baud rate to match the new AT command speed although the baud rate value stored by the SB command remains the CHAPTER 5 Command Mode same This provides you with a convenient way to switch the serial port speed and still make it easy to go back to the original speed automati cally the next time the modem is powered up or reset with an ATZ command The command to set the Serial Port Baud Rate is AT SBn where n can be 300 1200 2400 4800 9600 19 200 38 400 57 600 or 115200 bps as listed below AT SB300 300 bps AT SB1200 1200 bps AT SB2
100. ee consecutive times from a remotely connected site your modem responds with its Remote Configuration procedure 15 Callback Time Delay Unit Seconds Range 10 255 Default 20 Description S15 defines the time delay between Callback attempts after initial passwords have been exchanged between modems Refer to Chapter 7 for Callback Security information CHAPTER 6 S Registers 16 Callback Attempts Unit Attempts Range 1 255 Default 4 Description S16 defines the number of attempts allowed after initial passwords have been exchanged between modems 17 Changing Break Time Unit 10 mSec intervals Range 0 250 Default 250 Description S17 defines the break time space sent to the local PC The default is set for a 250 mSec 2 5 second break The break time can be changed in 10 mSec increments by increasing or decreasing the value of S17 18 Automatic Leased Line Restoral 336 Only Unit Minutes Range 10 255 Default 30 Description When the Series II Modem 336 MD1640A is in dial backup mode it periodically checks the lease line to see if it is operational and tries to restore the lease line if possible S18 defines how often attempts occur The default of S18 is 30 minutes and can be set in one minute increments from 10 to 255 minutes Setting the S18 restoral under 10 minutes causes excessive breaks in dial up operation SERIES II INTELLIGENT DATA FAX MODEMS 19 Dial Back Timer 336
101. em The CTS line indicates to the terminal that the Series II Modem will transmit any data present on the Transmit Data line pin 2 Data Set Ready Pin 6 DSR CC Direction from modem DSR On indicates that the Series II Modem is in the data mode and is connected to the communications channel This signal will be on during analog loop test mode Signal Ground Pin 7 SG AB The SG lead is connected to signal ground of the modem It establishes the common ground reference for all other interface signals Data Carrier Detect Pin 8 CD CF Direction from modem DCD On positive voltage indicates that data carrier has been received from the other modem This circuit will not normally turn on in the presence of message circuit noise or out of band signals There is a one second delay between when the carrier tone has been detected and when the CD circuit is turned on This signal goes off if received data carrier falls below the receiver threshold for more than 37 mSec When CD is off the Received Data circuit pin 3 is held to the marking state Test Voltage Pin 9 XV Direction from modem The XV lead has 330 ohms of resistance to 12 volts DC This lead may be used to strap other signals high For example if the terminal does not supply a DTR Data Terminal Ready signal Pin 9 may be jumpered to Pin 20 DTR on the RS232 connector or in the cable to force DTR on SERIES II INTELLIGENT DATA FAX MODEMS Transmit
102. em has detected carrier at 14400 bps and gone on line SERIES II INTELLIGENT DATA FAX MODEMS TERSE VERBOSE Effect Digit Words 19 CONNECT 19200 Modem has detected carrier at 19200 bps and gone on line 21 CONNECT 21600 Modem has detected carrier at 21600 bps and gone on line 24 CONNECT 24000 Modem has detected carrier at 24000 bps and gone on line 26 CONNECT 26400 Modem has detected carrier at 26400 bps and gone on line 28 CONNECT 28800 Modem has detected carrier at 28800 bps and gone on line 31 CONNECT 31200 Modem has detected carrier at 31200 bps and gone on line 33 CONNECT 33600 Modem has detected carrier at 33600 bps and gone on line Note If Series II Modem is used in MNP Reliable mode the following responses change IR CONNECT RELIABLE 5R CONNECT 1200 RELIABLE 9R CONNECT 2400 RELIABLE lIR CONNECT 4800 RELIABLE 12R CONNECT 9600 RELIABLE 13R CONNECT 14400 RELIABLE 19R CONNECT 19200 RELIABLE 21R CONNECT 21600 RELIABLE 24R CONNECT 24000 RELIABLE 26R CONNECT 26400 RELIABLE 28R CONNECT 28800 RELIABLE 31R CONNECT 31200 RELIABLE 33R CONNECT 33600 RELIABLE APPENDIX F Result Code Summary Note If Series II Modem is used in LAP M reliable mode the following responses change IL CONNECT LAPM 5L CONNECT 1200 LAPM 9L CONNECT 2400 LAPM 10L CONNECT 4800 LAPM 12L CONNECT 9600 LAPM 13L CONNECT 14400 LAPM 19L CONNECT 19200 LAPM 21L CONNECT 21600 LAPM 24L CONNECT
103. entered Simply enter ATL and hit RETURN to display these numbers on your video screen or printer An example of an L command listing is shown below DT14922345678 DT17245551212 DP9 T14929876543 DT3738315 12101 17247465500 DT7465500R DP9 4258513 DTX4 amp E1 amp E5 amp E13 amp E15DT 17247465500 DT12138880123 WANA AARWH OS SERIES II INTELLIGENT DATA FAX MODEMS 5 4 4 Configuration and Default Storage Commands Store Configuration amp S Register Parameters in Non Volatile Memory amp W The Series II Modem can store configuration parameters and S Register values in its nonvolatile read write Random Access Memory RAM memory The amp W command does this which prevents any re configuration from being lost on a power down or Reset ATZ condition access phone number credit card number amp WO0 or AT amp W causes the Modem to store your customized AT command settings and S Register values in its nonvolatile RAM amp WO also sets the modem so that it reads your customized settings stored in nonvolatile RAM when powered down or reset The amp W0 command only changes the settings stored in nonvolatile RAM that you specifically intend to alter All other default parameters are applicable amp W1 causes the Modem not to store your customized settings to nonvolatile RAM so that after powering down or resetting the modem it reads the factory default settings stored in ROM Loading Factory Defaults amp F T
104. es a retrain that makes the processor read Line Probe information Valid only when on line in V 34 mode L9 Displays Signal Strength information L10 Displays Signal to Noise Ratio information SNR L11 Displays noise information 6 S Registers 6 1 Introduction Certain Command Mode configurations are stored in memory registers called S Registers The S command is used to assign a value to and to read the current value of an S Register To assign a value to an S Register enter the letter S followed by the S Register number and an equals sign and then a decimal response to the message ENTER THE NEW VALUE IN DECIMAL FORMAT To read an S Register value enter the letter S followed by the S Register number and a question mark then hit RETURN To verify that the S Register value was entered correctly enter for example ATS8 and hit RETURN You should receive a response of the assigned value given to that S Register Refer to Section 6 2 Reading and Assigning S Register Values so Number of Rings Until Modem Answers Unit Rings Range 0 255 Default 1 Description SO defines the number of rings the modem waits before answering an incoming call The default value is one ring Decimal 1 which means that the modem answers the call immediately after the first ring The maximum number of rings that can be configured is 255 Setting the value to zero 0 disables auto answer completely S1 Rings Which
105. etected within this period the modem disconnects hangs up and is ready for another call Originate Mode The abort timer functions the same as in answer mode except that the timer begins after the modem has completed dialing instead of when it first goes off hook It is possible to change this forty five second wait period to any other value from 0 seconds up to 255 seconds or to disable the timer completely by re configuring S Register S7 see Chapter 6 5 Inactivity Timer Causes the modem to disconnect if no data is transmitted or received for a specified time The timer is restored any time a character is passed through the serial port in either a send or receive state This timer runs in both normal or reliable connections and is controlled by S Register S30 The Inactivity Timer can be disabled by setting 30 to 0 which is the factory default setting SERIES II INTELLIGENT DATA FAX MODEMS 5 Command Mode 5 1 Introduction AT commands are the means by which you and your communications software are able to communicate with and configure your modem They enable you to establish read and modify parameters in addition to dialing The following provides both a summary and a detailed explanation of the AT commands recognized by the Series II Modem 5 1 1 AT Command Editing The BACKSPACE key on your keyboard can be used to edit characters in the AT command line An AT command is not executed until the RETURN key is presse
106. f MB Set modem speed e g MB33600 SB Set serial port speed e g SB115200 EXECUTE H Help IMMEDIATE I Product Code Inquiry ACTION 19 Windows 95 Autodetect Inquiry COMMANDS L5 List Current Operating Parameters L6 List S Register Values L7 List additional Configuration Parameters L8 List On Line Diagnostics H Off Hook AT lt CR gt Escape Sequence Entering Command Mode while On Line E Escape Sequence Options Entering Command Mode while On Line A Force Answer Mode 0 Exit Command Mode Go Back On Line EXECUTE DF Format Line Probe Display Graph or LINE Table Format PROBE DP Enable Disable Reading Line Probe COMMANDS L9 Display of Signal Strength Information L10 Display Signal to Noise Ratio SNR L11 Display of Noise Information amp RP Initiates Retrain to Read Line Probe Parameters SERIES II INTELLIGENT DATA FAX MODEMS READ AND Sr Read Current S Register Value ASSIGN Sr Assign S Register Value S REGISTER VALUES REMOTE CBN Passwords for Callback Phone s CONFIGURATION DB Callback Security Enable Disable amp CALLBACK l Change LOGIN Password SECURITY RCBNxx Erase Password Linked with Memory Location xx S Change SETUP Password TEST MODEM U Self Test Modem Chapter 8 amp T Enable Disable Digital Loopback Signal 5 3 Result Codes The Series II Modem Command mode provides you with several re sponses or Result Codes that can aid you in Command mode operation These Result C
107. ffect any other flow control or pacing already configured in the modem When configured for ENQ ACK the ENQ Control E and ACK Control F signals from the HP equipment will be accepted and re sponded to according to Hewlett Packard protocol Normal Mode Modem Flow Control On amp E11 When two Series II Modems are connected in Normal mode not using error correction Xon Xoff can be used to control the flow of data between the modems Flow Control can be turned on or off with the Normal Mode Modem Flow Control commands When the modems are CHAPTER 5 Command Mode connected in Reliable mode a different method of modem flow control is used and the commands for Normal Mode Modem Flow Control are ignored When you are using Speed Conversion in Normal Mode you must activate the modem s Normal Mode Modem Flow Control Speed Conversion is explained in Section 5 4 11 Terminal Computer Initiated Pacing amp E13 As mentioned earlier the Series II Modem can initiate flow control by issuing Xon Xoff commands or toggling the CTS signal on the RS232C interface The modem can also be configured to react to similar com mands and signals from the computer or terminal to which it is attached via the RS232C interface We refer to the computer or terminal initiated flow control as Pacing When the modem is set for Pacing On the modem will respond to the terminal or computer pacing When the modem is set for Pacing Off it will ignore pac
108. g or your modem may not initialize correctly e Ifyou don t get an OK the problem may still be in the communica tions software Make sure you have done whatever is necessary in your software to make a port connection Not all communications programs connect to the COM port automatically Some connect when the software loads and remain connected until the program terminates Others can disconnect without exiting the program make sure the Connect icon looks plugged in If the terminal reports that it cannot make a connection yet the modem s TR indi cator is on click on the Window menu to see if more than one ter minal is open The modem s TR indicator shows that the software has made a connection with the modem through the COM port APPENDIX A Troubleshooting e Your communications software settings may not match the physical port the modem is connected to The serial cable may be plugged into the wrong connector check your computer documentation to make sure Or you may have selected a COM port in your software other than the one the modem is physically connected to compare the settings in your software to the physical connection Ifthe modem is on the cable is plugged into the correct port the communications software is configured correctly and you still don t get an OK the fault may be in the serial cable Make sure it is firmly connected at both ends e Is this the first time you have used the cable If so i
109. g the Call If you determine that your Series II Modem is malfunctioning do not attempt to alter or repair the unit It contains no user serviceable parts Call Black Box Technical Support at 724 746 5500 Before you do make a record of the history of the problem We will be able to provide more efficient and accurate assistance if you have a complete description including e the information requested in Section A 1 e the nature and duration of the problem e when the problem occurs e the devices components involved in the problem e any particular application that when used appears to create the problem or make it worse the results of any testing you ve already done A 3 Shipping and Packaging If you need to transport or ship your Series II Modem Package it carefully We recommend that you use the original container e Ifyou are shipping the Modem for repair make sure you include the phone line cords and power supply you re using with it If you are returning the Modem make sure you include everything you received with it Before you ship contact Black Box to get a Return Authorization RA number APPENDIX A Troubleshooting A 4 Upgrading the Series Il Modem s Firmware The Series II Modem has a Flash PROM which contains firmware code for the hardware and DSP code for the digital signal processor chips At various times we may add enhancements and or fixes to the firmware The flash technology use
110. hat manner For example you would pulse dial the number 555 1212 by entering ATDP5551212 and hitting RETURN You could tone dial the same number by entering ATDT5551212 and hitting RETURN If neither Pulse nor Tone dialing is specified in the dial command the Series II Modem uses whatever method used last If the modem has been reset or just powered up it uses Pulse dialing even if the letter P is not included in your dial command CHAPTER 5 Command Mode Nearly all telephone systems in the U S are now compatible with tone dialing Since that is the faster method you will probably choose the tone method for your dialing An example of combining pulse and tone dialing could involve a PBX system where 9 had to be pulse dialed first then the rest of the number tone dialed after pausing for a second dial tone The number would be dialed by entering ATDP9 T5551212 and RETURN The comma causes a pause which we ll explain soon Set Pulse Dial Ratios amp P This command sets the time ratios between the open and closed portions of the dialing pulse frequencies To select a dialing pulse ratio of 60 mSec 40 mSec enter AT amp PO To select a ratio of 67 mSec 33 mSec enter AT amp P1 The factory default is amp PO Automatic Pauses in Dialing You can cause the Series II Modem to pause during the dialing sequence by entering a comma character where the pause is desired This pause lasts two seconds If a longer pause is desire
111. he amp F command provides a choice between customized configuration settings in RAM and the factory default configuration settings in ROM The amp F8 and amp F9 commands define the function of the amp F command The Series II Modem is shipped from the factory with a pre configured set of command and S Register default settings This set of factory de faults can be recalled by issuing the amp F command In addition to being able to recall the factory installed defaults the amp F command can also recall those defaults stored under amp WO This is done using the amp F9 command If you have stored parameters with the amp W0 command and wish these settings to always be used as your defaults you would enter amp F9 amp WO To return the amp F command to read factory installed defaults enter amp F8 amp WO amp F8 is the factory default CHAPTER 5 Command Mode Many datacomm program issue the amp F command automatically the amp F9 command allows the user to select their own factory defaults Note that the amp F8 amp F9 commands should be used with amp WO0 Following is a summary of how the amp F and Z reset commands interact with the amp W command note how the amp F reset command operates differently from the Z reset command Previous Command AT amp F Power On and ATZ AT amp W1 default ROM ROM AT amp WO ROM NVRAM AT amp F8 amp WO ROM NVRAM AT amp F9 amp WO NVRAM NVRAM Modem Reset Z The Z command can
112. he Help commands are structured so that you can call up one of three Help screens as follows AT H1 Help Screen 1 AT H2 Help Screen 2 AT H3 Help Screen 3 Inquiry for Product Code Some systems or software packages automatically check the identification of the modem with which they are communicating by using the command This read command lets the software to deter mine the type of modem with which it is communicating When ATI or ATIO is entered the Series II Modem responds with 247 When ATI1 is entered the modem responds with a three digit code indicating the firmware version number When ATI2 is entered the modem responds with MD1641 A if it s a 336 model or MD1640A if it s a 336 model Windows 95 Autodetect Inquiry I9 This read command permits a Windows 95 operating system to query the Series II Modem s characteristics When ATI9 lt CRz gt is entered the symbols BA 28800 FAX CT 336 model or BL 28800 FAX CT 336 model are displayed which indicates to the Windows 95 system that your particular modem is a Series II Modem 336 or 336 28 800 bps fax Class 2 capable modem With autodetect support in your Modem your PC can automatically allocate resources and configure it and other devices The Modem implements autodetect capability in the form of a single JNF Information file that specifies AT Command mode and Result Code Registry Keys that are specific to your Modem CHAPTER 5 Command
113. he number is dialed By inserting 9 into the dial prefix you do not have to in clude it in each directory entry in the terminal To change the dial prefix in Windows Terminal select Settings Modem Commands To change it in Windows 95 HyperTerminal select Call Connect from the menu bar click Dialing Properties and type 9 in the local and long distance boxes in How I Dial from This Location Ifthe modem reports NO ANSWER the other system has failed to go off hook or you might have dialed a wrong number Check the number Ifthe modem reports NO CARRIER the phone was answered at the other end but no connection was made You might have dialed a wrong number and a person answered instead of a computer or you might have dialed the correct number but the other computer or software was turned off or faulty Check the number and try again or try calling another system to make sure your modem is working Also try calling the number on your telephone If you hear harsh sounds then another modem is answering the call and the modems may be having problems negotiating because of modem incompatibilities or line noise Try connecting at a lower speed SERIES II INTELLIGENT DATA FAX MODEMS The Modem Disconnects While On line If you have call waiting on the same phone line as your modem it may interrupt your connection when someone tries to call you If you have call waiting disable it before each call In most telephone ar
114. his enter the command AT amp D3 and hit RETURN The modem will now reset itself whenever DTR is dropped from On to Off and will also go on hook hang up if it is on line Entering AT amp DO or AT amp D causes the Modem to ignore DTR Entering AT amp D1 causes the modem to go on hook hang up with loss of DTR The modem enters Command mode when DTR goes high again Auto answer is disabled while DTR is low Entering AT amp D2 causes the modem to go on hook with loss of DTR The modem enters command mode when DTR goes high again Clear to Send Control amp R The amp R command allows you to control the Clear to Send signal CTS Pin 5 on the RS232C interface You have three choices You can force the CTS signal high allow it to act normally or set it to stay high until the modem disconnects go low momentarily and then go high again The last option is useful with some CBX phone systems and mainframe front ends which require CTS to act in this manner To allow CTS to act normally enter the command AT amp RO To force CTS on enter the command AT amp R1 this is the factory default setting When the modem goes on line CTS still provides flow control To set up CTS so that it drops for one second on disconnect and then comes up again enter the command AT amp R2 If you want the drop time to be something other than one second use S Register 24 to change this value Refer to Chapter 6 SERIES II INTELLIGENT DATA FAX MODEMS
115. ic Answer Off 6 UP Max throughput On Down Max throughput Off 7 UP RTS dependent on Interface Down RTS forced On at all times 8 UP Disable Command Mode Down Enable Command Mode 9 UP Local Digital Loopback On Down Remote Digital Loopback On 10 UP Dial Up Operation Down Leased Line Operation 11 UP AT Responses Down Series II Responses 12 UP Synchronous Mode On Down Asynchronous Mode On Factory Default Setting APPENDIX D DIP Switch Summary Synchronous Mode DIP Switch Condition Effect 1 UP DTR Dependent On interface Down DTR forced On at all times 2 UP SDLC Mode On Down BSC Mode On 3 UP Command Mode Response Off Down Command Mode Response On 4 UP AS 400 Mode Off Down AS 400 Mode On 5 UP Answer Mode On Down Originate Mode On 6 UP Slave Clocking Off Down Slave Clocking On 7 UP RTS Dependent on interface Down RTS forced on at all times 8 UP Command Mode Off Down Command Mode On 9 UP Local Digital Loopback On Down Remote Digital Loopback On 10 UP Dial Up Operation SERIES II INTELLIGENT DATA FAX MODEMS Down Leased Line Operation 11 UP External Clock selected Down Internal Clock selected 12 UP Synchronous Mode On Down Asynchronous Mode On Factory Default Setting DIP Switches 13 16 DIP Switch Condition Effect 13 14 UP UP 28 8 K bps Operation 13 14 Down UP 19 2 K bps Operation 13 14 UP Down 14 4K bps Operation 13 14 Down Down 9600 bps Operatio
116. ics listing and checking for parameters that may be unacceptable number of re trains round trip delay etc My Fax and Communications Software Won t Run at the Same Time Communications devices can be accessed by only one application at a time Under DOS or Windows 3 1x you can run either your fax software or your datacomm software but not both at the same time unless you have a special communications device management application In Windows 95 you can have data and fax communication applications open at the same time but they cannot use the same modem at the same time APPENDIX A Troubleshooting A 2 Contacting Black Box A 2 1 Recording Modem Information Please fill in the following information on your Series II Modem on a photocopy of this page This will help tech support in answering your questions Modem Model No Modem Serial No Modem Firmware Version COM Port FAX Software Type and Version DataComm Software Type and Version The modem model and serial numbers are silkscreened on the bottom of your modem The software versions are printed on the diskette labels Type ATI1 to display the modem firmware version Please note the status of your modem before calling tech support This status can include LED indicators screen messages diagnostic test results problems with a specific application etc Use the space below to note modem status SERIES II INTELLIGENT DATA FAX MODEMS A 2 2 Makin
117. ime has past also by country regulation Some country regulations have numbers remain on the Forbidden Numbers list permanently The Delayed Number and Forbidden Numbers lists are eight numbers long 20 characters each V 25bis Operation Operation in V 25dis mode is similar to AT command mode in that certain DIP Switch functions are important to its operation V 25dis does not include any speed detection for asynchronous mode so when you are giving commands you must stay in your initial speed i e if you change your terminal speed while entering an AT command you will get no responses In synchronous mode the modem supplies the clock so the synchronous terminal knows the speed You must be in V 25bis mode for the commands described here to function Most AT commands will also function except those associated with dialing such as ATD ATN ATO and ATU To get into V 25bis mode you type AT V1 At this point your modem does no more speed or parity detection things associated with asynchronous operation To get out of V 25bis mode and back into AT command mode enter AT VO The AT V2 command allows you to run one V 25bis command from AT command mode without leaving AT command mode There is no command to select between asynchronous and synchronous V 25bis operation The position of DIP Switch 12 selects between modes For synchronous mode DIP Switch 12 must be UP and the AT command mode enabled Another asynchronous m
118. in terminal mode or include V1X4 in the modem s initialization string When you dial again the modem will report the call s progress e Ifthe modem reports NO DIALTONE check that the modem s telephone line cable is connected to both the modem s LINE jack not the PHONE jack and the telephone wall jack If the cable looks secure try replacing it If that doesn t work the problem may be in your building s telephone installation To test the building installation plug a telephone into your modem s telephone wall jack and listen for a dial tone If you hear a dial tone your modem may be installed behind a company phone system PBX with an APPENDIX A Troubleshooting internal dial tone that sounds different from the normal dial tone In that case the modem may not recognize the dial tone and may treat it as an error Check your PBX manual to see if you can change the internal dial tone if you can t change your modem s initialization string to replace X4 with X3 which will cause the modem to ignore dial tones Ifthe modem reports BUSY the other number may be busy in which case you should try again later or it may indicate that you have failed to add a 9 prefix to the phone number if you must dial 9for an outside line If you must dial 9 to get an outside line the easiest way to dial it au tomatically is to include it in the modem s dial prefix e g ATDTY Note the comma which inserts a pause before t
119. ing In order for the Series II Modem to be set for Pacing On a modem initiated method of flow control must be previously selected Once this is done the Modem will respond to either Xon Xoff commands or to the toggling of the RTS Request to Send signal on Pin 4 of the RS232C interface depending on what you selected earlier as your Modem Initiated Flow Control method Maximum Block Size amp BS The maximum size of Reliable mode data blocks can be controlled with the amp BS command MNP 3 sends blocks of 1 to 64 characters MNP 4 and 5 typically send blocks of 1 to 256 characters and LAP M typically send 128 characters For MNP Classes 4 and 5 and for LAP M reducing the block size to 64 characters may give a smoother flow of data and better throughput on noisy phone lines Using smaller block sizes over good phone lines may cause a slight loss in throughput speed AT amp BSO Maximum transmit block size of 64 characters AT amp BS1 Maximum transmit block size of 128 characters LAP M or 256 characters MNP The factory default setting is amp BS1 SERIES II INTELLIGENT DATA FAX MODEMS Asynchronous Word Length Selection EB 336 Only The Series II Modem 336 MD1641A has an 11 bit capacity when operating asynchronously The EB command selects between 11 bit and 10 bit operation AT EB1 enables 11 bit format 1 start bit 8 data bits 1 parity bit and 1 stop bit AT EBO default enables 10 bit format 1 start bit
120. installation where the call is automati cally answered Your Series II Modem has a default configuration to dial another 33 600 bps modem that support error correction data com pression and flow control If the answering modem is not compatible the Modem can match protocols provided the protocols are industry standard i e ITU or Bell and not proprietary The amp W command used in conjunction with specific other AT commands and S Registers can re configure the Modem to conform to a specific application The command AT amp WO0 or AT amp W causes the modem to store its current parameters in its nonvolatile RAM The command also sets the modem upon power up or when it is reset with an ATZ command the modem reads all of its configuration and S Register parameters from RAM and not from the factory settings in ROM note that you may recall factory installed defaults by entering AT amp F8 amp W0 The amp W command changes the configuration para meters stored in RAM that you specifically intend to alter All other default parameters remain unchanged The AT amp W1 command sets the modem so that it does not store its parameters in RAM and on power up or when an ATZ command is issued parameters are read from the factory default settings in ROM Before using the amp W command you may want to view the modem s current operating parameters Use the ATL5 ATL6 and ATL7 com mands to display the current modem configuration 7 Callbac
121. is also used to select which dialing method is used Five different X commands are available X0 through X4 with five different effects on the Modem s Result Codes Xo Provides the basic short result codes and provides dumb dial capabilities X1 Provides the extended result codes and provides dumb dial capabilities The remaining X commands affect Call Progress and turn on Extended Result Codes X2 Looks for dial tone only and will not provide a busy response X3 Looks for busy only and not look for dial tone X4 Looks for dial tone and for busy The factory default setting is X0 which selects Basic Result Codes and the blind dumb method of dialing SERIES II INTELLIGENT DATA FAX MODEMS 5 4 6 Phone Line Conditioning Commands Guard Tones amp G The amp G command is used to control the presence or absence of guard tones from the transmitter when in Answer mode at either 1200 or 2400 bps Guard tones are used in Europe and other areas for the modem to function in the telephone systems Guard tones are not used in the United States amp GO default turns off CCITT guard tones amp G1 turns on 550 Hz guard tones amp G2 turns on 1800 Hz guard tones Phone Line Monitoring Speaker M The Series II Modem has an internal on board speaker which functions like the speaker in a telephone handset to enable you to monitor phone line activity The M command can be used to determine when the speaker is
122. ity to operate the equipment This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of Industry Canada Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la classe A prescrites dans le R glement sur le brouillage radio lectrique publi par Industrie Canada APPENDIX J Regulatory Information FCC Part 68 Regulations for Telephone Line Interconnection l This equipment complies with Part 68 of the Federal Communica tions Commission FCC rules On the outside surface of this equipment is a label that contains among other information the FCC registration number and ringer equivalence number REN If requested this information must be provided to the telephone company 2 As indicated on the next page the suitable jack Universal Service Order Code connecting arrangement for this equipment is shown If applicable the facility interface codes FIC and service order codes SOC are shown An FCC compliant telephone cord and modular plug is provided with this equipment This equipment is designed to be connected to the telephone network or premises wiring using a compatible modular jack which is Part 68 compliant See installation instructions for details 3 The ringer equivalence number REN is used to determine the quantity of devices which may be
123. iynan n n 41 410 Handsh king Details srini 4l 4 11 Call Termination iss y a E S 42 Chapter 5 Command Mode 5 1 Jntrod ctio niii ainnean neaei ea i a 44 5 1 1 AT Command Editing ssssessssesesseesseessssssssssesrsseressenesee 44 5 1 2 Functional Modes cece cseescceeeceeeecnsecnseseeeeeeeeeaes 45 5 2 Summary of AT Commands cceeeeeeeeecrsesecnseeeeeseees 46 5 3 Result CodeS eisie iaeei iaar aeaa iiS 50 5 4 Dialing Commands ssepe iine e 52 5 4 1 Dialing Action Commands s ssssssssesssssssssrsesissereseeeeee 52 5 4 2 Dial Modifier Commands 0 0 0 ese cess ceeeeeeeeeeeeeees 54 5 4 3 Phone Number Memory Commands ceeeeee 58 5 4 4 Configuration and Default Storage Commands 60 5 4 5 Command Response Result Code Commands 63 5 4 6 Phone Line Conditioning Commands eee 66 5 4 7 RS232C Interface Control Command cee 68 5 4 8 Error Correction Commands eee eeseeeseeeeeeeeeeeees 70 5 4 9 Flow Control Commands ccecsesssssceeceeeceeeeeeeeeeeeeees 75 5 4 10 Compression Error Correction Flow Control Pass Through and Pacing Commands 00 81 5 4 11 Speed Conversion Commands ccceceeceeeseeseeseeees 82 Table of Contents 5 4 12 Immediate Action Commands ccccescececeeceeeeneens 85 5 4 13 Line Probe Commands cccccccceceeseessnececeececeeneees 90 Chapter 6 S Registers 6 1 Introduicthomeisciset Eaa EEES 92 6 2
124. k Security and Remote Configuration 7 1 Introduction This chapter describes how the Series II Modem Callback and Remote Configuration features operate These features use a multilevel security system which involves the use of LOGIN Passwords Setup Passwords and Remote Escape Characters The primary level security code is the modem s LOGIN Password Once this password is entered other passwords can be used For instance entering the LOGIN Password will allow you to enter the Setup Pass word which in turn allows you to enter Callback Passwords and dial back phone numbers Callback Passwords tell your modem what dial back phone number to call The Remote Escape Character is the key to using the Remote Configu ration feature The Remote Escape Character lets you enter Command mode via a remote call so that you can enter AT commands just as if you were locally connected You must also enter your modem s Setup Password The Remote Escape Character is contained in S Register S13 7 2 Callback Feature Description The Callback feature protects your network from unauthorized access and helps control long distance costs By use of Callback Passwords and dial back phone numbers you can have your modem dial back remote locations immediately after being called A special command Enable Callback DB turns your modem into a Callback security modem The Callback Password Phone number entry is protected by two level security your modem
125. lephone lines 5 Avoid using a telephone other than a cordless type during an electrical storm There may be a remote risk of electrical shock from lightning 6 Do not use the telephone to report a gas leak in the vicinity of the leak SERIES II INTELLIGENT DATA FAX MODEMS 2 2 Installation The installation of the Series II Modem consists of making the physical connections necessary to render the modem functional with your computer This includes making the proper serial phone line and power connections Refer to Figure 2 1 below for the Series II Modem 336 MD1641A or to Figure 2 2 on the next page for the Series II Modem 336 MD1640A Following the installation instructions are some preliminary aspects of issuing AT commands and the Modem s Originating Answering capabilities The installation process involves 1 Verify the settings of DIP switches 5 Originate vs Answer mode and 10 Lease Line vs Dial Up operation See Chapter 9 2 Attach the Series II Modem to a dialup phone line and or a 2 wire leased line using the included RJ11 telephone cords For the 336 MD1641A model run a cord from the LINE jack to the dialup CHAPTER 2 Installation and Connection wall jack or the leased line wall jack or terminal refer to Figure 2 1 below For the 336 MD1640A model run a cord from the PSTN jack to the dialup wall jack if you re connecting to a dialup line run a cord from the LEASE jack to the 2 or 4
126. lt Async Sync Mode Switching amp M This command can be used to set the on line mode to either synchronous or asynchronous AT amp MO0 will set the Series II Modem to Asynchronous mode and all communications will be asynchronous in both On line and Command modes AT amp M1 causes the Modem to com municate asynchronously when in Command mode and switch to syn chronous mode while on line The modem defaults to amp MO asynchronous communications on reset or power up Synchronous Transmit Clock Select amp X The amp X command selects the Synchronous Transmit Clock Source in conjunction with DIP Switch 11 DIP Switch 11 in the UP position enables External clocking DIP Switch 11 in the DOWN position enables Internal clocking default position External clocking is when the DTE provides transmit clocking to the modem on pin 24 of the RS232C interface amp X0 is the default setting which allows DIP Switch 11 to control Internal External Clocking default Internal Internal clocking is when the modem provides transmit clock to the DTE on pin 15 of the RS 232C V 24 interface The amp X1 command overrides DIP Switch 11 and selects External clocking If DIP Switch 11 is UP External clocking you can not override Internal clocking amp X2 enables Slave Clocking The amp X2 Command causes the Series II Modem to generate the transmit clock timing pin 15 from the receive clock pin 17 from the DTE therefore 15 and 17 are the same
127. mand lines of up to 60 digits each help menus 60 characters Trellis Coded Modulation TCM at 33 600 31 200 28 800 26 400 24 000 21 600 19 200 16 800 14 400 12 000 and 9600 bps Quadrature Amplitude Modulation QAM at 9600 non trellis 4800 and 2400 bps PSK at 1200 bps FSK at 300 bps V 21CH2 FSK at 300 bps V 27ter DPSK at 4800 and 2400 bps V 29 QAM at 9600 and 7200 bps V 17 TCM at 14400 12000 9600 and 7200 bps SERIES II INTELLIGENT DATA FAX MODEMS Fax Carrier V 21CH2 Half Duplex Frequencies 1650Hz Mark 1850Hz Space for Transmit Originate 1650Hz Mark 1850Hz Space for Transmit Answer V 27ter 1800Hz Originate Answer V 29 QAM 1700Hz Originate Answer V 17 TCM 1800Hz Originate Answer Lease Line Restoral 336 MD1640A only When in dial backup mode modem attempts leased line restoral periodically controlled by S Register 18 setting Carrier Frequencies 1800 Hz V 32 V 32bis V 34 Enhanced V 34 33 6K 31 2K 28 8K 26 4K 24K 21 6K 19 2K 16 8K 14 4K 12K 9 6K 7 2K 4 8K Carrier Frequencies Transmit Originate 1200 Hz 2400 amp 1200 bps Transmit Answer 2400 Hz V 22bis V 22 or Receive Originate 2400 Hz Bell 212A Standard Receive Answer 1200 Hz Carrier Frequencies 1270 Hz Mark 1070 Hz Space for 300 bps Bell Standard Transmit Originate 2225 Hz Mark 2025 Hz Space for Receive Originate 2225 Hz Mark 2025 Hz Space for Transmit Answer 1270 Hz Mark 1070 Hz Space for Receive Answer Transmit Le
128. mmand mode the V 25bis command follows V2 on the command line Change Serial Baud Rate CSP Command The CSP command will change the serial baud rate of your modem by entering CSPsssss where Sssss can equal 0300 300 bps 1200 1200 bps 2400 2400 bps 4800 4800 bps 9600 9600 bps 19200 19200 bps 38400 38400 bps 57600 57600 bps 115200 115200 bps SERIES II INTELLIGENT DATA FAX MODEMS Dial Phone Number Provided CRN Command The CRN command permits the dialing of the phone number immedi ately following it from the command line It is similar to the D com mand of the AT command set except that the number is first checked against the Delayed Number and Forbidden Number list If permitted depending on the country regulations in effect the number will then be dialed For example if you enter CRN7859875 and hit RETURN your modem will check the two lists If the number is on the Delayed Numbers list you can dial that number again after t minutes have passed If the number is on the Forbidden list a CFIFC message will be displayed You can use various commands from the AT command set within the CRN command line to facilitate the dialing process such as P T or for pulse dialing tone dialing and wait for dial tone V 25bis supports smart dialing To dial a phone number enter CRNdd dd where dd dd is the phone number which can be up to 20 characters long using any character on the telephone pad
129. mode DIP Switch 6 controls the option of having timing controlled by the receive clock The originate modem in effect adjusts to the answer remote modem Place DIP Switch 6 in the DOWN position to enable Slave Clocking Place DIP Switch 6 in the UP position to disable Slave Clocking Slave Clocking Enabled Switch 6 DOWN Slave Clocking Disabled Switch 6 UP Factory Default Setting UP Switch 7 Request To Send Forced RTS Asynchronous Synchronous Mode Leased Line Dial Up If your computer or terminal uses RTS CTS protocol typically used in some synchronous applications but also if using hardware pacing for V 42 error correction or speed conversion you may want to set RTS to function independently of CTS DIP Switch 7 UP For most CHAPTER 9 DIP Switch Settings applications especially asynchronous this switch should be set so that RTS is forced On DIP Switch 7 DOWN RTS functions Normally Switch 7 UP RTS forced On Switch 7 DOWN Factory Default Setting DOWN Switch 8 Enable Disable Command Mode Com Asynchronous Synchronous Mode Leased Dial Up In some applications you may want to disable the Series II Modem s Command mode so that the modem does not recognize or react to AT or V 25bis commands This may be true in strictly auto answer applications where no call origination is required Place DIP Switch 8 in the DOWN position to enable Command mode Place DIP Switch 8 in the UP position t
130. mote Configuration Escape Character S15 Seconds 10 255 20 Defines time delay for Callback attempts after initial passwords have exchanged S16 Attempts 1 255 4 Defines the number of Callback attempts after initial passwords have exchanged between modems S17 10mSec 0 2 5 250 mSec Defines length of break time space to PC S18 30 min 10 255 30 Defines how often leased line is checked and restoral attempted S19 Minutes 0 255 1 Timer used in dial backup mode Specifies time duration modem attempts to restore leased line connection APPENDIX E S Register Summary S REG UNIT RANGE _DEFAULT _DESCRIPTION S24 50 mSec 0 255 20 Sets DSR CTS CD dropout time Default 20 equals one second S25 100 mSec 0 255 0 Sets DTR dropout time 0 default equals 50 mSec S26 Failed 0 255 0 Specifies number Attempts of failed password attempts allowed S29 1 1 255 20 Specifies the amount of idle time can elapse between AT commands after the SETUP password has been entered S30 Minutes 0 255 0 Inactivity timer used to disconnect modem S32 100mSec 0 255 20 Sets time that modem waits for a lt RETURN gt to be entered during escape sequence execution S34 Chars 0 60 10 Buffer size for number of characters in AT command string after on line escape sequence before buffer is cleared and escape sequence aborted SERIES II INTELLIGENT DATA FAX MODEMS S REG UNIT RANGE _ DEFLT DESCRIPTION S36 Seconds 0
131. mum of 6 and maximum of 10 characters yy memory locations are from 0 to 29 Must specify P pulse or T tone dialing in string DXXxXxxx NXxx Callback Phone Numbers xxxxxx with the preceding the phone number indicating the callback modem phone number for the corresponding password at the same memory SERIES II INTELLIGENT DATA FAX MODEMS location The preceding the phone number enables direct entry when the caller uses the correct password without the callback modem having to return the call The entry at the end of the phone number represents an extension added to the main phone number The Nxx is the memory location of the callback phone number and password Pn Parity of the prompt messages sent by the callback modem P0 is no parity P1 is odd parity P2 is even parity Command Description RCBNxx Erases the callback password stored at memory location xx Memory locations are 0 to 29 RDNxx Erases the callback phone number stored at memory location xx Memory locations are 0 to 29 Password Command Summary Command Description HIXXXXXXXXXX Login Password is any keyboard characters x upper lower case sensitive minimum 6 and maximum 10 characters The default Login Password is IBLACK BOX Syyyyyyyyyy Setup Password is any keyboard characters y upper lower case sensitive minimum 6 and maximum 10 characters The default Setup Password is SMODEMSETUP APPENDIX C Command S
132. n Note The modem baud rate command e g MB33600 overrides the setting of these speed selection switches DIP switches 13 and 14 15 UP CD DSR from Interface Sync amp Async Down CD DSR Forced On 16 UP 2 Wire Leased Line Sync amp Async Down 4 Wire Leased Line Factory Default Setting APPENDIX E S Register Summary Appendix E S Register Summary S REG UNIT RANGE DEFAULT DESCRIPTION SO Rings 0 255 1 Sets number of rings before modem answers S1 Rings 0 255 0 Counts rings which have occurred S2 ASCII 0 127 43 Sets Escape Code character default is plus sign S3 ASCII 0 127 13 Sets character recog nized as RETURN default is CTRL M S4 ASCII 0 127 10 Sets character recognized as LINE FEED default is CTRL J S5 ASCII 0 32 127 8 Sets character recog nized as BACKSPACE default is CTRL H s6 Seconds 2 255 2 Determines wait time for dial tone S7 Seconds 1 255 45 Determines how long modem waits for carrier before aborting call S8 Seconds 0 255 2 Sets pause time caused by a comma character in a dial command s9 100 mSec 1 255 6 Sets carrier detect response time SERIES II INTELLIGENT DATA FAX MODEMS S REG UNIT RANGE _DEFAULT _DESCRIPTION S10 100 mSec 1 255 7 Sets delay time between when carrier is lost and when modem disconnects S11 1 mSec 1 255 70 Sets time duration of and spacing between tones in tone dialing S13 ASCII 0 127 37 Defines Re
133. n order to transfer to Extension 5678 you might enter ATDT5551234 5678 The commas cause a 4 second pause just to be safe Calling Card Detect Tones The Series II Modem has the capability to detect AT amp T calling card tones for the purpose of utilizing the user s calling card number to originate an on line connection An symbol placed in the dialing string causes the modem to pause and wait for an AT amp T calling card or a 1600 Hz tone prevalent in the United Kingdom When the tone is detected the rest of the dialing string is processed If no tones are detected within the time period set by S Register S7 default 45 seconds the modem will abort by indicating a NO CARRIER message Hitting any key also aborts the command The following is an example of this command AT DT 01 099907247465500901 23 4567 8910 1112 Quiet Answer The command causes the Series II Modem to wait before processing the next symbol in the dialing string The wait is for one or more ringbacks followed by 5 seconds of silence If the time specified by S Register S7 passes before the rings and silence a NO ANSWER R result code is processed The command is used for accessing a system that does not provide a dial tone For example ATDT5551212 7465500 causes the Series II Modem to dial the first number 555 1212 and wait for the time specified in 87 SERIES II INTELLIGENT DATA FAX MODEMS for at least one ringback and 5 seconds
134. nable Disable Lowspeed Fast Connect amp CD Cleardown at Disconnect A Auto Speed Detect SERIES II INTELLIGENT DATA FAX MODEMS CONTROL RS232C amp C Carrier Detect Control INTERFACE amp D Data Terminal Ready Control amp R Clear To Send Control amp S Data Set Ready Control amp RF CTS RTS Control amp SF DSR CD Control CONFIGURE amp E0 Normal Mode ERROR amp E1 Auto Reliable Mode CORRECTION amp E2 Reliable Mode LO Negotiate V 42 Mode During Handshake L1 MNP On LAPM Off L2 LAPM On MNP Off L3 Direct LAPM Phase Out Handshake SA Auto Reliable Buffering F Enable Disable Auto Reliable Fallback Character R Retransmit Count E Error Correction at 300 bps CONFIGURE amp E3 Flow Control Disabled FLOW CONTROL amp E4 Hardware Flow Control amp E5 Xon Xoff Modem Initiated amp E6 Xon Xoff Modem Responds No Pass Through amp E7 Xon Xoff Modem Responds Pass Through Allowed X Send Single Multiple Xoff Characters amp E8 Enq Ack Off amp E9 Eng Ack On amp E10 Normal Mode Modem Flow Control Off amp E11 Normal Mode Modem Flow Control On amp E12 Computer Initiated Off amp E13 Computer Initiated On amp BS Maximum Block Size CHAPTER 5 Command Mode EB 336 MD1641A only 10 11 Bit Asynchronous Format P Parity Selection CONFIGURE DATA amp E14_ Data Compression Disabled COMPRESSION amp E15 Data Compression Enabled CONFIGURE SPEED BA0 Speed Conversion On CONVERSION BA1 Speed Conversion Of
135. nal and safety requirements The Industry Canada does not guarantee the equipment will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissi ble to be connected to the facilities of the local telecommunications company The equipment must also be installed using an acceptable method of connection The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas Caution Users should not attempt to make such connections them selves but should contact the appropriate electric inspection authority or electrician as appropriate lt BLACK BOX Copyright 2000 Black Box Corporation All rights reserved 1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746
136. nclude the time spent compressing and decompressing ZIP or SIT files but it will save on phone bills And hardware compression will still be there for those occasions when it is inconvenient to compress a file with software Note also that when you download files with compression disabled you can use a slower serial port if you have an older UART 3 7 1 Disabling Error Correction By default the Series II Modem is set to auto reliable mode In this mode the Modem determines during the handshake whether the other modem is using V 42 error correction If it is the Modem then switches itself to reliable mode and enables error correction If it is not the Modem remains in non error correction mode Normally we recommend that you leave the Modem set to auto reliable mode amp E1 However you may encounter some circumstances in which the Modem will work better with error correction turned off For example it has been reported that on CompuServe error correction will slow file transfers at modem speeds of 9600 bps and under If this is a problem for you you can turn off error correction with the command AT amp E0 or you can include the command in your initialization string as follows AT amp F S0 0 X4 amp E0 M CHAPTER 4 Manual Dial and Automatic Answer 4 Manual Dial and Automatic Answer 4 1 Introduction We ll assume that yours is the very common application where you are using a Series IT Modem to dial up a remote com
137. nd Remote Configuration Change LOGIN Password l The default LOGIN password for your Series II Modem is BLACK BOX If you choose to activate callback security you should change the LOGIN password using this command in the following format ATH HIXXXXXXXXXX lt CR gt where xxxxxxxxxx is the current LOGIN password Your modem will respond with OK indicating that you can enter the new LOGIN password as follows AT l yyyyyyyyyy lt CR gt You can select any combination of keyboard characters upper lower case sensitive between six and ten characters long Change SETUP Password S The default SETUP password for your Series II Modem is MODEMSETUP If you choose to activate callback security you should change the SETUP password using this command in the following format ATHSittttttttt lt CR gt where tttttttttt is the current SETUP password Your modem will respond with OK indicating that you can enter the new SETUP password as follows AT S uuuuuuuuuu lt CR gt You can select any combination of keyboard characters upper lower case sensitive between six and ten characters long Erase Callback Password RCBNxx This command erases the single callback password specified by xx 0 through 29 Erase Callback Phone Number RDNxx This command erases the single phone number specified by xx 0 through 29 SERIES II INTELLIGENT DATA FAX MODEMS 7 5 Remote Configuration Callback Security S Registers Th
138. number on the forbidden list CON ssss Connection at ssss speed if X1 in effect V 25bis AT Commands The AT commands associated with V 25bis mode are described as follows Note that one command enables and disables V 25dis mode and the rest are only operable in the V 25bis mode APPENDIX G V 25bis Operation Enable Disable V 25bis Mode V Command The function of the V command is to select the V 25dis mode in asynchronous mode Synchronous mode is set up with switches For example the modem could be in AT command mode AT V1 and if synchronous mode is enabled with AT Command mode enabled then V 25bis mode is selected Prior to executing this command make sure that your modem is properly set up to perform the type of operation you will be performing Refer to the initialization section of this appendix for information about modem set up When in V 25b7s mode most normal AT commands will also function except D N O and U V 25bis operates in asynchronous or synchronous modes depending on the position of DIP Switch 12 and does not check for terminal speed so do not change speeds while in this mode or parity In synchronous mode speed is not important since the internal clocks provide synchro nization To place your modem in V 25bis mode from asynchronous mode enter the AT V1 command To return to AT command mode enter the AT V0 command AT V2 allows you to run one V 25bis command from AT command mode without leaving AT co
139. o disable Command mode The factory default setting is Command mode enabled Disable Command Mode Switch 8 UP Enable Command Mode Switch 8 DOWN Factory Default Setting DOWN Switch 9 Digital Loopback Test Asynchronous Synchronous Mode Leased Line Dial Up When in Synchronous mode this switch controls both Local Digital Loop and Remote Digital Loop tests while on line When the Voice Data switch is toggled to the Answer mode position UP and DIP Switch 9 is in the UP position the Series IT Modem performs the Local Digital Loopback test When DIP Switch 9 is DOWN and the Voice Data switch is toggled to Answer mode position UP the Series II Modem performs the Remote Digital Loopback test Local Digital Loopback Test Switch 9 UP Remote Digital Loopback Test Switch 9 DOWN Factory Default Setting DOWN SERIES II INTELLIGENT DATA FAX MODEMS Switch 10 Leased Line Dial Up Operation DDD Asynchronous Synchronous Mode Leased Line Dial Up The Series II Modem operates in either leased line or dial up modes This switch controls leased line dial up operation Place DIP Switch 10 in the UP position for Dial Up operation Place DIP Switch 10 in the DOWN position for Leased Line operation Dial Up Operation Switch 10 UP Leased Line Operation Switch 10 DOWN Factory Default Setting UP Switch 11 AT Responses Series II Responses Asynchronous Mode Leased line Dial Up In Asynchronous mode you can se
140. ode concern is the problem of connecting at a different speed than the speed at which the serial port is set If your modem port speed is different from the serial port speed you must either 1 Enable speed conversion and have flow control on or 2 Enable connect responses with the ATX7 command and change the serial baud rate after receiving a connect message SERIES II INTELLIGENT DATA FAX MODEMS If the VD1 command is entered when in Auto Answer mode the modem answers immediately upon receiving the first ring There is no disconnect message NO CARRIER if a normal connection is made V 25bis Set Up and Initialization Before you operate your modem in the V 25b7s mode you need to make sure it is set up properly various RS 232 lines such as DSR and CTS act as specified in the V 25bis standard Setup involves proper DIP Switch settings and soft switches software controlled conditions V 25bis DIP Switches 1 Unforced DTR 2 NA 3 NA 4 NA 5 Auto Answer enabled 6 Async Max throughput set Sync Slave Clocking unforced 8 Command Mode forced 9 Digital Loopback Off 10 Dial Up 11 Async AT Series II Resp 12 Async Sync mode set per requirements APPENDIX G V 25bis Operation V 25bis Mode AT Commands The following commands will either alter standard V 25bis behavior so you must be careful in their use or they are not allowed as indicated All other commands can be used in
141. odem has been sent a DB1 command which secures the modem from local and remote configuration or dialing i e no AT commands can be sent until the LOGIN and SETUP passwords have been entered Units Minutes Range 1 255 Default 20 SERIES II INTELLIGENT DATA FAX MODEMS 8 Modem Testing 8 1 Introduction Each time you power up the Series II Modem it performs an automatic self test to ensure proper operation The Modem also has four diag nostic test features Local Analog Loopback Digital Loopback remote automatic Digital Loopback local manual and a modem Back to Back test A loopback test involves entering data from your PC and looping that data through the circuits of your modem and or a remote modem When the loop has been completed the original data entered should match the data received back on your PCs monitor after the test The Local Analog Loopback Test allows you to verify that the modem s transmitter and receiver circuits are functioning properly The Digital Loopback Test local manual allows you to verify that the remote computer or terminal the remote modem serial ports the telephone line and the local modem are functioning properly The Digital Loopback Test remote automatic allows you to verify that the local computer or terminal the two modems and the transmission line between them are functioning properly The Back to Back test lets you connect two Series IT Modems with a back to back cabl
142. odes are displayed on your video monitor You can choose result codes that closely match those of the standard AT command set or choose enhanced function result codes that have been used in Series II Modems Series IJ responses The amp Q command selects which result codes will be used You can choose to have these Result Codes displayed in either verbose full words or terse digits format This is controlled by the ATVO terse or ATV1 verbose commands The Series II Modem defaults to verbose format AT amp Q0 selects Series II responses with Reliable LAPM Compression modifiers The terse response code for CONNECT 2400 is 9 AT amp Q1 selects Standard AT command set responses The terse result code for CONNECT 2400 is 10 CHAPTER 5 Command Mode The following tables define the result codes generated by the amp Q command refer to Appendix G for Result Code Summary Table 5 1 amp Q0 Series ll Result Codes TERSE VERBOSE TERSE VERBOSE 0 OK 11 CONNECT 4800 1 CONNECT 12 CONNECT 9600 2 RING 13 CONNECT 14400 3 NO CARRIER 19 CONNECT 19200 4 ERROR 21 CONNECT 21600 5 CONNECT 1200 24 CONNECT 24000 6 NO DIALTONE 26 CONNECT 26400 7 BUSY 28 CONNECT 28800 8 NO ANSWER 31 CONNECT 31200 9 CONNECT 2400 33 CONNECT 33600 With MNP error correction on RELIABLE or R is added to these result codes With LAP M error correction on LAP M or L is added to these result codes With data compre
143. of silence If a busy signal is detected the Series II Modem hangs up and generates a BUSY result code If it does not detect 5 seconds of silence a NO ANSWER result code is generated after hanging up If 5 seconds of silence is detected the second number 746 5500 is then dialed 5 4 3 Phone Number Memory Commands Storing Phone Numbers D N A telephone number and command line of up to sixty characters may be stored in the Series II Modem s number memory As many as ten of these numbers may be stored Each number will be given a name using the codes NO N1 N2 up to N9 A phone number is stored by entering ATD then the number as it would be dialed along with any P T R or comma characters and then entering N followed by the number s name which would be any number from 0 through 9 and then hitting RETURN For example the tone dialed number 1 612 631 3550 would be stored as number N3 by entering ATDT17247465500N3 and RETURN The number is not dialed with this store command After storing a number check to see that it has been stored correctly by typing ATL and hitting RETURN When phone numbers are stored the entire command line is also stored so that you can effectively create a macro for each number For example if you know a particular number needs to have extended result codes detect busy or dial tone error correction Xon Xoff flow control pacing and data compression enabled the command line would be
144. ok and waiting for the answerback tone turns on its transmitter when it hears the tone Then after a one second delay the orignating modem s CD Carrier Detect comes on The called modem then responds to the originating modem by turning on its CD Carrier Detect signal and the handshaking is completed Note With the modem in Reliable or Auto Reliable mode some additional handshaking takes place This is explained in Section 5 4 8 4 11 Call Termination There are a number of ways to terminate a call or simply stated hang up They are 1 Command Mode Control To terminate a call by Command Mode enter ATH then RETURN or send a BREAK signal followed by ATH and a RETURN 2 DTR Control If DTR Data Terminal Ready is turned off for 50 milliseconds or more a disconnect occurs This is probably the most common method used by computer systems at the automatic answer end of the line to cause the answering modem to disconnect after logging off procedures 3 Loss of Carrier After a data connection is established the modem disconnects if a loss of carrier occurs for 700 milliseconds 0 7 seconds or more Note that one cause of carrier loss would be if one of the modems disconnect normally CHAPTER 4 Manual Dial and Automatic Answer 4 Abort Timer Answer Mode When OH Off Hook comes on the called modem starts a forty five second timer and waits for a carrier signal from the originating modem If carrier is not d
145. on another popular application for speed conversion involves an auto answer Series IT Modem connected to a computer that does not have autobaud capability This means that the CHAPTER 5 Command Mode computer must be set at a fixed baud rate regardless of whether the modem is communicating over the phone line at 300 1200 2400 9600 14 400 19 200 24 000 28 800 or 33 600 bps In this application speed conversion allows the modem to match its speed to that of the calling modem while at the same time communicating with the attached computer through its RS232C port at a fixed baud rate which can be pre selected at 300 1200 2400 4800 9600 19 200 38 400 57 600 or 115 200 bps Speed Conversion BA When using speed conversion you must set the modem so that it does not adjust its speed at the RS232C serial port even if the modem does adjust its data rate To turn Speed Conversion ON enter the command AT BA0 amp WO and hit RETURN To turn Speed Conversion OFF enter AT BA1 amp W0O and hit RETURN The modem will now match its RS232C speed to that of the computer and will adjust its speed to any changes in the computer s speed in Originate mode or to the speed of the originating modem in Answer mode The speed at which the modem communicates over the phone line will always be the same as the speed at which it communicates via its RS232C serial port Modem Baud Rate MB The MB command presets the Series II Modem s transmi
146. onal feature enter the number of marks where indicated equal to the number of digits in the desired extension number i e with a 4 digit extension enter When a caller uses that particular password Step 3 of Table 7 3 he or she then enters an extension number directly after the password with the same number of digits as the number of marks originally entered When calling back that particular number your modem will also dial the indicated extension number Note To view Callback Passwords Numbers use the L Command 6 To store changed parameters to memory enter AT amp W0O and hit RETURN Note If you have enabled Callback Security DB1 in step 2 of Table 7 2 the Series II Modem will be secured locally To gain local access you must again perform steps 7 and 8 7 Enter your modem s LOGIN Password as selected in Table 7 1 by entering ATHIXXXXXXXXXX lt CR gt xxxxxxxxxx from Table 7 1 8 Enter your modem s Setup Password as selected in Table 7 1 by entering AT Syyyyyyyyyy lt CR gt yyyyyyyyyy from Table 7 1 SERIES II INTELLIGENT DATA FAX MODEMS Table 7 3 Callback Operational Sequence Procedures Perform the following steps when dialing into a dialback modem Step Procedure 1 When called the modem answers and after a slight delay responds with Password gt 2 Enter your modem s LOGIN Password Table 7 1 and hit RETURN If entered correctly the modem responds with DB gt 3 Enter
147. one Network PSTN dial up services and your equipment outputs a synchronous data stream V 25bis commands are essential V 25bis mode AT commands do not include any modem configuration commands You can execute normal AT commands in V 25dis mode for modem configuration Delayed and Forbidden Numbers V 25bis provides the facility to delay failed call retry attempts by putting numbers that failed to connect on a special Delayed Number list Subse quent dialing of these numbers will be delayed time specified by a country regulation and an appropriate message displayed If the number is retried more than the maximum allowed number of times number is also specified by country regulation it is placed on the Forbidden Numbers list and no further retries will be allowed When the Forbidden Numbers list is full no dialing is allowed and a CFIFF indication is given The modem in AT command mode will respond with NO CARRIER If country regulations require that the Forbidden Numbers list be checked in AT mode then NO CARRIER will be the response to a dial attempt in AT mode Numbers will also be put on the Forbidden Numbers list if the Delayed Numbers list is full and a new number fails for the first time In that case the new number will be APPENDIX G V 25bis Operation added to the Delayed Number list and the oldest existing number added to the Forbidden Numbers list Numbers are removed from the Forbidden Numbers list by after a certain t
148. one trying to connect with the modem will be required to furnish a password The CBN command allows you to enter passwords for each of the 30 memory locations used for callback security The length of each password can be up to 10 characters but must be at least 6 characters Any ASCII character can be used The format for this command is ATHCBNyyXxxxxxxx lt CR gt with XXXXXXXX representing the password and yy being the memory location 0 29 Each callback password XXXXXXXX must start with a non numeric character Callback Security Enable Disable DB The purpose of this command is to enable or disable default setting your modem s callback security option Once this command is executed you modem will undergo some significant changes For example the phone number memory locations NO through N9 will be used for passwords and phone numbers In other words you will not be able to dial from memory or use the DTR dialing feature You can turn on callback security by typing AT DB1 or AT DB2 and pressing lt CR gt If you want to engage both remote and local password security use the DB1 command This sets up the modem so you have to provide passwords to dial into the modem and to dial out For remote password security only use the DB2 command This allows the local operator to dial out without providing the LOGIN and SETUP passwords Use DB3 when calling another modem with callback security active CHAPTER 7 Callback Security a
149. ons rarely change from session to session The most important configuration is the modem initialization string This is a sequence of commands the software uses to configure the modem when the communications software is loaded or when a session begins Always begin the initialization string with the A7tention command AT then follow it with the modem reset command amp F Issuing a reset command before other commands ensures that you are starting with a known state The rest of the commands in the initialization string depend on the capabilities of the modem and what you want it to do Some older communications programs require you to create the initialization string by yourself Most modern communications programs however provide you with a ready made initialization string that is automatically selected when you choose your modem model from a list It is a poor idea to use an initialization string intended for another modem especially one from another manufacturer because modem capabilities and command implementations vary from modem to modem However if your Series II Modem does not appear on a modem list you may use any initializ ation string labeled MultiModemII that might appear in the list SERIES II INTELLIGENT DATA FAX MODEMS 3 4 PC Initialization Strings We recommend the following initialization string for a Series I Modem connected to a PC compatible computer when sharing a line with a telephone AT amp F X4 SO 0
150. operational Entering ATMO disables the speaker completely while ATM1 causes the speaker to be on only until a carrier signal is detected ATM2 causes the speaker to remain on at all times ATM3 causes the speaker to be on during dialing and off during handshake ATMT is the default setting and the one that should be used in most applications Enable or Disable Recognition of Remote Digital Loop Signal amp T The Series II Modem has several self test features covered in Chapter 8 The tests are activated with different U commands such as ATU7 and so forth The amp T command is a phone line conditioning command that enables or disables the modem s ability to recognize the Remote Digital Loop RDL test signal The AT amp T4 command lets the Modem respond to a RDL signal and places itself in digital loop The AT amp T5 command causes the modem to ignore the RDL signal The factory default is amp T5 Enable Disable Trelis Coded Modulation T This command enables or disables the Trellis Coded Modulation of the Series II Modem There is usually no need to disable turn off Trellis CHAPTER 5 Command Mode codings except under an unusual line condition called impulse noise AT TO turns Trellis coding off and AT T1 turns Trellis coding on factory default Fallback Modes When On Line F If line conditions deteriorate the Series II Modem automatically drops its transmission speed fallback The F command controls th
151. orks with the addition of dial backup capability With this capability the dialup feature prevents downtime if the leased line fails Since the Modem operates according to ITU V 34 modulation it can operate full duplex over two wires so that the dial backup mode performs the same throughput as the leased line 1 5 Fax Features Your Series II Modem meets the ITU V 17 standard for sending and receiving faxes When linked to a compatible fax machine or modem it can transmit faxes at 14 4 K bps It also meets the ITU s Group 3 Designation for sending and receiving faxes at 9600 bps and Group 2 Designation for sending and receiving faxes at 4800 bps The Modem is also downward compatible with modems to speeds as low as 300 bps so it can send and receive faxes with any fax machine in the world SERIES II INTELLIGENT DATA FAX MODEMS 1 6 Technical Specifications Your Series II Modem data fax modem meets the specifications listed below Data Rates modem 33 600 31 200 28 800 26 400 24 000 21 600 19 200 16 800 14 400 12 000 9600 7200 4800 2400 1200 0 300 bps Data Rates fax 14 400 9600 7200 4800 bps Data Format Serial binary asynchronous at 0 300 1200 2400 4800 7200 9600 12 000 14 400 16 800 19 200 21 600 24 000 26 400 28 800 31 200 33 600 bps synchronous at 1200 2400 4800 7200 9600 12 000 14 400 16 800 19 200 21 600 24 000 26 400 28 800 31 200 33 600 bps Compatibility ITU V 42
152. otal of 100 mSec per pulse or a rate of 10 pulses per second The interdigital pause time is 800 mSec The pulse ratios are controlled by the amp P command Tone Dial Frequencies Hz Digits e G El BI BI m 4 s Le 052 e m CJ bl El el Hz 1209 1336 1477 1633 APPENDIX C Command Summary Appendix C Command Summary Command _ Values Description AT Attention Code that precedes most comd strings except A A and Escape Codes RETURN Pressing RETURN key executes most commands In Dial Comd This symbol placed in dialing string enables the modem to detect AT amp T s call card tones for accessing user s calling card to originate an on line connection A Answer call even if no ring present Repeat last command Do not precede this command with AT Do not hit RETURN to execute A Continuous redial of last number until answered A Repeat previous command Do not precede this command with AT An n O0orl A0 discards data during auto reliable time period A1 buffers data during auto reliable time period An n Othru3 A0 selects initial handshake at 33 600 to 31 200 to 28 800 to 24000 to 21 600 to 19 200 to 16 800 to 14 400 to 12 000 to 9600 to 4800 to 2400 to 1200 to 300 bps A1 selects initial handshake at 33 600 bps only A2 selects initial handshake at 33 600 to 31 200 to 28 800 to 24000 to 21600 to 19 200 to 16 800 19 200 to 14 400 to 9600 to 4800 bps A3 selects initial handsh
153. ote and local modems transfer their functional capabilities using modulated calling and answering tones indicating the common capabilities of the modem at each end Once this is done a probing signal is passed between the modems to identify impairments in the telephone channel e g Receive Signal Strength vs Frequency Noise vs Frequency and Signal to Noise Ratio vs Frequency After receiving the results of the probing signal the modem receivers and transmitters begin with the lowest speed and move up until reaching the highest speed at which they can exchange data All this occurs in about five seconds There are a number of Line Probe Commands These commands are configurable and can be stored to RAM via AT amp WO0 CHAPTER1 Specifications These commands are listed below Enable Disable Reading of Line Probe Information Commands DPO Do not read Line Probe information from DSP during handshake Default DP1 Read Line Probe information from DSP during handshake Format of Line Probe Graph or Table Commands DFO Data is displayed in Graph format Y axis is shown in dBms Default DF1 Data is displayed in Table format Numeric values are displayed 150 Hz to 3750 Hz in 75 Hz increments Immediate Action Line Probe Commands To activate these commands first type AT lt CR gt on line escape command while maintaining command mode then type the Command prefixed by an AT amp RP This command initiat
154. our choices You can force the signal high or allow it to act normally or force the modem to reset when CD drops or set it to stay high until the modem disconnects go low momentarily and then go high again The last option is useful with some CBX phone systems and mainframe front ends which require CD to act in this manner To allow CD to act normally enter the command AT amp C1 the factory default setting To force CD on enter AT amp C0 To reset the modem to its current parameters when CD drops enter AT amp C4 To set up CD so that it drops for one second on disconnect and then comes up again enter AT amp C2 If you want the drop time to be something other than one second use S Register S24 to change this value Refer to the Chapter 6 instructions for S24 CHAPTER 5 Command Mode Data Terminal Ready Control amp D Data Terminal Ready DTR on Pin 20 of the RS232C interface is required in order for the Series II Modem to operate A high DTR signal tells the modem that the device to which it is connected is active or ready to communicate through the modem If the signal is not being provided on the RS232C interface you can force DTR high with DIP Switch 1 Chapter 9 DTR has some other Modem functions DTR can be used to trigger a dialing sequence called DTR Dialing The condition of DTR can also be used to cause the modem to reset to its default parameters just as if you had given the modem an ATZ command To do t
155. puter The Series II Modem has been factory preset for originating a call to a compatible 33 600 bps modem also set up for hardware flow control V 42 error correction V 42dis data compression and CTS RTS operation If the answering modem is not set up similarly the Modem automatically adjusts to the appropriate protocol 4 2 Dialing On Line Answering There are several basic steps for originating and answering in data communication mode l Load communication software 2 Dial 3 Establish On Line connection 4 Terminate Call A simple way to dial is from the keyboard of your computer or terminal You enter a command on the keyboard to tell the Series II Modem to dial If you use a sophisticated communications software package the software tells you to enter phone numbers and other information If this is the case the software and not you gives the dialing commands to the modem All of the commands option registers and intelligent features of the Series II Modem are taken care of by the software If you are giving commands directly to your modem and not through your software each command must begin with AT ATtention Characters AT characters may be entered in upper or lower case SERIES II INTELLIGENT DATA FAX MODEMS Entering AT automatically sets the modem s speed to match the speed of the computer or terminal and also sets the modem s parity The AT characters alert the modem that a command follows
156. re is also an in between state Wait for Carrier where the modem is out of Command mode but not yet really On Line When the modem is initially powered up it is in Command mode and is ready to accept commands from your keyboard or software The Modem enters On line mode after dialing making a connection with another modem and then detecting a valid carrier signal If no carrier is detected within a certain time frame the modem abandons the call and re enters Command mode Once on line the modem exits On line mode if one of two conditions is met If the carrier is lost or intentionally dropped the modem hangs up and re enters Command mode Also if the Modem recognizes the Escape sequence for which it is configured i e either the Escape characters in the serial data stream the Remote Escape characters in the modulated data stream or the Break signal the Modem will exit On line mode retain the datacomm link and enter Command mode You can force the Series II Modem into On line mode without dialing by sending the ATD or ATA command to the modem SERIES II INTELLIGENT DATA FAX MODEMS Dial D or A command or incoming phone call WAIT FOR CARRIER no carrier detected a ATO ON LINE lt los carrier lost MODE command Figure 5 1 Functional Modes carrier detected 5 2 Summary of AT Commands A wide variety of autodial operations and modem options can be con trolled when the Series II Modem is in Comm
157. rmal If the timer expires the modems goes to dial back mode The purpose of the timer for the Answer modem is to determine when it accepts a dial up call When both timers have expired and the leased line has not been established the dial back procedure starts The number dialed is the one stored in location N9 of the originate modem s phone number memory In the preparation for proper dial back operation enter the proper number in the N9 location using the commands detailed in Chapter 5 Keep in mind that the number also can be dialed in V 25bis Command mode CHAPTER 4 Manual Dial and Automatic Answer 4 6 Dial Up Operation 336 Only When your Series II Modem 336 MD1640A is used as a dial up modem DIP Switch 10 in the UP position it can both originate and answer calls To originate calls you use the automatic dialing capability of the Modem s Command mode To do this use the computer or terminal keyboard to enter a few command letters followed by the phone number you wish to dial If you have a computer with sophisticated communications software you may end up talking back and forth with the software and the software will take care of talking to the modem It is still possible however to dial your data calls using a telephone set There are few reasons why you would want to do this but if you have a need to use the telephone set to dial we explain how in the next section We will delay our coverage of Command Mode au
158. ry default parameters then turns auto answer off and stores that setting along with all other current para meters in nonvolatile memory The amp F9 command causes the modem to load the values from nonvolatile memory the next time it receives the amp F command You will use the same initialization string as before AT amp F X4 M But now the Modem will load the values stored in nonvolatile memory when you turn on the modem and when you issue the ATZ or AT amp F reset commands Note Because it clears the command buffer you should not use ATZ in an initialization string 3 4 2 Other Parameters The default values for the other parameters in modem configuration menus rarely need changing They typically include the dialing prefix ATDT for touch tone service and ATDP for rotary service the dialing suffix M the hang up string ATHO M and response messages RING NO CARRIER BUSY etc Communications software with a host mode might also include an auto answer string ATSO 14M 3 5 Macintosh Initialization Macintosh computers cannot use RTS CTS hardware flow control without a serial cable wired for hardware control The Macintosh 128 and 512 models cannot use RTS CTS flow control at all For those Macintoshes turn off the default RTS CTS hardware flow control turn on XON XOFF flow control and pacing and ignore DTR AT amp F X4 amp E5 amp E13 amp D0 M For hardware flow control use the following initialization s
159. s Appendix A Troubleshooting Appendix B Pulse Dial and Tone Dial Frequencies Appendix C AT Command Summary Appendix D DIP Switch Summary Appendix E S Register Summary Appendix F Result Code Summary Appendix G V 25bis Operation Appendix H Series II Modem Cables Appendix I RS232 Interface Specifications Appendix J Regulatory Information SERIES Il INTELLIGENT DATA FAX MODEMS 1 3 What is in Your Modem Package Your Series II Modem is made up of many components Make sure you have them all before trying to operate your modem Your package should include e The Series II Modem itself e AC Power Transformer e 2 RJ 11 to RJ 11 telephone cords e This Owner s Manual e 336 MD1640A only 1 RJ 11 to spade lugs leased line cable If any of these items are missing please contact Black Box 1 4 Modem Features Your Series II Modem meets the proposed Enhanced V 34 ITU standard for data signalling rates as high as 33 6 31 2K bps in full duplex mode Connections can be made on Public Switched Telephone Networks PSTNs and or point to point 2 wire and 4 wire leased telephone type circuits Enhanced V 34 is an extension of V 32 V 32bis V34 standards and supports and is compatible with those features including EIA extended Automode adaptive line probing automatic symbol rate and carrier frequency during start up and retrain and rate renegotiation in 2400 bps increments Your modem is compatible with
160. s To enable DTR Dialing enter the command AT D1 and hit Return The modem will now dial the phone number you have stored as NO when it receives a high DTR signal see the D N command in Chapter 5 DTR must remain high for the duration of the call until disconnect To disable DTR Dialing enter the command AT D0 or AT D and hit RETURN When you use DTR Dialing be sure that DIP Switch 1 is in the UP position so that DTR is not forced on In addition when using DTR Dialing in a synchronous application be sure that DIP Switch 8 is in the UP position to disable V 25bis Command mode APPENDIX G V 25bis Operation ITU V 25bis Country Specific Information Due to the flexibility of the V 25bis standard each country may establish specific regulations governing the way operations are handled Here are details about how each country s specific regulations can affect the operation of V 25bis in modems that the Series I Modem might communicate with This information is provided for your reference only the Series II Modems are not approved for operation outside the U S and Canada 1 Italy a Command Indication modifications 1 Phone number indications include status ZPSTTT a Z U D or F for Unrestricted Delayed or Forbidden b P Delay time if delayed c S Number of retries so far d TTT Interdiction time to further attempts b Delayed and Forbidden list behavior 1 5 retries without delay 2 2 minute delay bet
161. s 300 bps V 42 error correction altogether AT E0 No V 42 Error correction at 300 bps AT E1 V 42 Error Correction at 300 bps The factory default setting is E0 5 4 9 Flow Control Commands Flow control refers to the techniques used by computer devices to stop and restart the flow of data to and from each other Flow control is necessary so that a device does not receive more data than it can handle In the case of the Series II Modem there is a need for flow control in both directions As illustrated on the next page flow control for data passing from your computer to the modem is called Modem Initiated Flow Control and flow control for data passing from the modem to your computer is called Computer Terminal Initiated Pacing The Series II Modem supports both hardware and software Modem Initiated Flow Control On the Computer Terminal Initiated Pacing side it supports hardware and software flow control and a special version used by Hewlett Packard compatible systems called ENQ ACK Pacing The Modem allows hardware and software pacing to be passed through the modem to the other end of the link so that your computer or terminal can control data start stop activity through your modem This is called Xon Xoff Pass Through To state it simply Flow Control is something the modem does to the computer while Pacing is something the computer does to the modem SERIES II INTELLIGENT DATA FAX MODEMS Moden Initiated Flow
162. s LOGIN Password and Set Up Password that keeps unauthorized personnel from changing parame ters When you first get your modem you need to change both security level codes to your unique settings The Callback Passwords and dial back phone numbers are in a special Callback Password dial back phone number memory 30 numbers CHAPTER 7 Callback Security and Remote Configuration long You use the modem s LOGIN Password and the Set Up Password plus special Callback commands to access this memory The memory is thirty numbers long and replaces your modem s normal phone number memory Each number is 35 characters long and can contain commands as well as phone numbers You need to set up your modem with the numbers and codes as part of the dial back initialization procedures Your modem will also remember if the incoming call was reliable or not and make the call back accordingly 7 3 Remote Configuration Description The Remote Configuration feature is a network management tool that allows you to configure modems remotely This means you could config ure modems anywhere in your network from one location without having to visit the sites or rely on remote users to follow your instruc tions With Remote Configuration which is protected by two level security you can download new parameters program new V 42 capabilities and implement new features Remote Configuration also makes troubleshooting a remote location a lot easier The w
163. s analog receiver be converted to digital data be reconverted into analog and then looped through its transmitter back to the remote modem Your modem passes this test if the data entered from the remote keyboard is the same as the data received on the remote monitor 6 When testing is complete you may end the test by typing an Escape Sequence 4 AT lt CR gt or lt BREAK gt AT lt CR gt to bring your modem into Command mode The modem should respond with an OK message If you wish to stay On line with the remote modem for normal data transmission type ATO and hit ENTER If you wish to terminate the call type ATH and hit ENTER to hang up SERIES II INTELLIGENT DATA FAX MODEMS 8 4 Digital Loopback Test V 54 Loop 2 Remote Automatic In this test your modem must be On line with another modem set up to respond to a request for Digital Loopback such as another Series II Modem With the Modem this ability to respond is controlled by the amp T command AT amp T4 enables the response to Digital Loopback Test remote automatic AT amp T5 disables the response The modem defaults to disable on power up so this must be changed on the remote modem before the modem will respond to a request for the Digital Loopback Test remote automatic Initiate the Digital Loopback Test remote automatic with the ATU2 command which automatically places the remote modem in digital loopback mode Data from your computer or terminal are transmitted
164. s another problem when the FIFO buffer is enabled Windows cannot recognize the COM port because of a bug in the Windows 3 1 serial port driver COMM DRV The only way around this problem is to replace the COMM DRV file in the WINDOWS SYSTEM directory with another driver Several drivers are available commercially on the World Wide Web or on BBSes that will solve this problem A freeware driver called CyberCom is available as CYBERC ZIP on CompuServe in the IBM Communications Forum Library 0 CyberCom will enable Windows communications at speeds up to 115 200 bps if you have a 16550 UART installed CHAPTER 3 Software Configuration 3 3 Configuring Your Software Communications software must be configured to work with your mo dem your computer and the remote system it is calling Fortunately most communications programs make the process easy by providing a default initialization string for your modem as well as defaults for most of the other required parameters 3 3 1 Configuring Software for Your Modem Because remote computers may have different connection re quirements such as speed number of bits parity log on sequences etc communications software is typically configured by sessions each session having a unique configuration for a given connection e g to the Internet to a BBS or to a commercial on line service Most communi cations programs however have a separate modem configuration menu because modem configurati
165. s if you had entered A after personally observing that the number was busy on the first dialing attempt Using the colon in the dialing string is a step saver Dialing a Stored Number N A telephone number that you have stored in the Series IT Modem s number memory may be automatically dialed by entering ATNn where n 0 1 2 3 4 5 6 7 8 or 9 For example a number stored at N3 would be dialed by entering ATN3 and RETURN Do not include the letter D in this command or the stored number will be erased also see Section 5 4 3 on Phone Number Memory Commands DTR Dialing D An alternate method of causing the Series II Modem to automatically dial is DTR Dialing Data Terminal Ready DTR is a signal that comes into the modem from the terminal or computer to which it is connected on pin 20 of the RS232C interface In DTR dialing the modem automatically dials a stored number as soon as it receives a high DTR Signal The DTR dialing method is popular in synchronous appli cations To activate DTR Dialing enter AT D1 and hit RETURN The modem dials the phone number stored in the NO location of memory when it receives a high DTR signal DTR must remain high for the duration of the call until disconnect To deactivate DTR dialing enter AT D0 and hit RETURN Note that when you use DTR Dialing in a synchronous application you need to make sure DIP Switch 8 is in the UP position to disable V 25 bis Command mode SERIES II INTELL
166. s with no Reliable Compression modifiers With this command the terse result code for CONNECT 2400 is 10 AT amp Q0 selects Series Il responses with Reliable Compression modifiers With this command the terse result code for CONNECT 2400 is 9 SERIES II INTELLIGENT DATA FAX MODEMS Result Codes Verbose Terse V The V command controls whether the Series II Modem s result codes are displayed as word verbose or single digit terse messages For example if after dialing no carrier signal is detected the resulting message can be displayed either as NO CARRIER or as the digit 3 Entering ATVO or ATV causes the Modem to display the Result Codes as digits while ATV7 displays them as words If you do not select a method the factory default setting causes the modem to display Result Codes as words Result Codes Basic and Extended and Call Progress Selection X The X Command is used to select one of two possible dialing methods dumb or smart and to select various response combinations related to these methods You can choose to have certain responses suppressed or whether or not you want speed indications along with the CONNECT responses You can also pick and choose certain responses in order to match up with Standard AT responses Refer to Appendix G for a summary of Result Codes The Series II Modem provides Basic and Extended Result Code sets The difference between the t
167. seseeeeeeeneeneenes 195 CHAPTER 1 Introduction and Description 1 Introduction and Description 1 1 Introduction Welcome to the world of data communications You have acquired one of the finest intelligent desktop data fax modems available today a Series II Modem from Black Box Your Series II Modem provides data communication at 33 600 14 400 bps Enhanced V 34 V 32bis as well as other prevalent datacomm standards The Modem supports adaptive protocol enhancing used in typical Unix batch file transfers and support for IBM s AS 400 and System 3X environment If your Series II Modem is a 336 model it also performs dial backup with automatic lease line restoration This Owner s Manual will help you install configure test and use your Modem 1 2 HowTo Use This Manual This manual is divided into nine chapters There are also several appendices at the end of this manual most of which repeat information contained in the chapters but in a more condensed form These appen dices can be used as a quick reference The information contained in each chapter and appendix is as follows Chapter 1 Introduction and Description This chapter begins with a short introduction followed by a guide which you are now reading to the use of this manual There is a discussion about what components you can expect in your Series II Modem package We then provide a more detailed description of the modem including the modem s technic
168. sions and Appletalk the networking software that allows Macintoshes to share files When Appletalk is active it controls all serial communications on the Macintosh Because it gives priority to network communications it may lose modem data at higher transmission speeds Therefore when Appletalk is active you risk losing data on serial port communications over 2400 bps though most users can work up to 9600 bps without problems Other activities that could cause the serial driver to drop bits at high speeds include the floppy disk driver formatting a disk the CPU paging in or out in virtual memory mode and the Mac IIci or IIsi running the on board video in 8 bit mode Therefore for maximum communications speed on the Macintosh we recommend as few concurrent activities as possible To use V 42bis compression at 19 200 bps or faster we recommend that you install a high speed serial port card Newer Macintosh computers such as the Quadra and Centris models support serial port speeds up to 115 200 bps 3 2 1 How Can You Identify Your UART Type If you have MS DOS 6 0 or later you can find your UART type from a diagnostic program called MSD To use it type MSD at the DOS prompt After the opening screen select COM Ports The last line of the report tells you what type UART you have for each COM port MSD does not distinguish between the 8250 and the 8250A However if you have an IBM AT or newer computer you likely have an 8250A or 16
169. so SERIES II INTELLIGENT DATA FAX MODEMS When two Series II Modems are connected in Normal mode not using error correction Xon Xoff can be used to control the flow of data between the modems Flow Control can be turned on or off with the Normal Mode Modem Flow Control commands When the modems are connected in Reliable mode a different method of modem Flow Control is used and the commands for Normal Mode Modem Flow Control are ignored When you are using Speed Conversion in Normal Mode you must activate the modem s Normal Mode Modem Flow Control Speed Conversion is explained in Section 5 4 11 Send Xon Xoff Characters X The X phone interface command allows the Series II Modem to send either a single or multiple Xoff characters at the modem s buffer full level When the Modem s buffer reaches it s buffer full level the next character received causes another Xoff to be sent for every character subsequently received by the Modem The AT X0 command factory default setting causes one Xoff to be sent until the buffer reaches the Xon level The AT X1 command causes an Xoff to be sent for every character received after the modem reaches its buffer full level Hewlett Packard ENQ ACK Pacing amp E9 If the Series II Modem is being used with Hewlett Packard or similar equipment that employs ENQ ACK pacing the modem can be configured to respond to ENQ ACK commands making it compatible with HP systems Doing so does not a
170. ssion baud rate for originate operations i e the speed of the modem s transmis sions over the telephone lines when originating a call With speed con version this transmission speed can be a different baud rate than the serial port speed When the Series II Modem receives answers a call from another modem it automatically switches its phone line transmission speed to match the calling modem However if the Modem originates a call to another modem that is unable to connect at the baud rate of the Modem it automatically drops to a lower baud rate in an attempt to match the speed of that modem For example if the Modem is set for 19 200 baud and calls another modem that has a top speed of 2400 baud it drops to 2400 baud SERIES II INTELLIGENT DATA FAX MODEMS The command to set the Modem Baud Rate is AT MBn where n can be 300 1200 2400 4800 9600 14 400 19 200 28 800 or 33 600 bps as listed below AT MB300 300 bps AT MB1200 1200 bps AT MB2400 2400 bps AT MB4800 4800 bps AT MB9600 9600 bps AT MB14400 14400 bps AT MB19200 19200 bps AT MB28800 28800 bps AT MB33600 33600 bps The factory default is 33600 bps Serial Port Baud Rate SB The SB command presets the speed of the Series II Modem s serial RS 232C port in both Originate and Answer modes Speed conversion allows you to set this serial port baud rate at a fixed speed of up to 115 200 bps regardless of the modem s transmission spe
171. ssion on COMPRESSED or C is added Note these Extended Result Codes are displayed when your modem is set up to do so with an X1 X2 X3 or X4 command Table 5 2 amp Q1 Standard AT Result Codes TERSE VERBOSE TERSE VERBOSE 0 OK 11 CONNECT 4800 1 CONNECT 12 CONNECT 9600 2 RING 13 CONNECT 14400 3 NO CARRIER 19 CONNECT 19200 4 ERROR 21 CONNECT 21600 5 CONNECT 1200 24 CONNECT 24000 6 NO DIAL TONE 26 CONNECT 26400 7 BUSY 28 CONNECT 28800 8 NO ANSWER 31 CONNECT 31200 10 CONNECT 2400 33 CONNECT 33600 Reliable Compression modifiers are not displayed with Standard AT Result Codes SERIES II INTELLIGENT DATA FAX MODEMS 5 4 Dialing Commands 5 4 1 Dialing Action Commands Dial Command D The letter Din a command causes the Series II Modem to dial the telephone number immediately following it For example if you enter ATD5551212 and hit RETURN the Modem dials the number 555 1212 The D command is also used in conjunction with a telephone set for manual dialing You dial the number on your telephone set and after hearing the answer tone on your handset you type ATD on your keyboard and hit RETURN Then hang up the headset Unless you have a specific need to dial in this manner we recommend you use the first method where the telephone number is entered on your keyboard The Series II Modem gives you several choices of dialing methods You can use tone or pulse dialing by inserting a letter T or a Pin the
172. t Place DIP Switch 2 in the UP position to enable SDLC mode and place DIP Switch 2 in the DOWN position to enable BSC mode SDLC Mode Switch 2 UP BSC Mode Switch 2 DOWN Factory Default Setting UP SERIES II INTELLIGENT DATA FAX MODEMS Switch 3 Enable Suppress Responses Q Asynchronous Mode Dial Up In some Asynchronous mode applications you may want to suppress all responses from the modem Place DIP Switch 3 in the DOWN position to enable Result Code responses Q0 Place DIP Switch 3 in the UP position and answer mode is handled without responses and echo turned off Q2 but originate is still intelligent Enable Responses Originate Answer Q0 Switch 3 DOWN Suppress Responses Answer Q2 Switch 3 UP Factory Default Setting DOWN Switch 3 dB Transmission Levels Asynchronous Synchronous Mode Leased Line DIP Switch 3 adjusts dB transmission levels required by some phone carriers Place DIP Switch 3 in the DOWN position to enable 9 dB transmission Place DIP Switch 3 in the UP position to enable 15 dB transmission 9dB Transmission Switch 3 DOWN 15dB Transmission Switch 3 UP Factory Default Setting DOWN Switch 4 AS 400 Mode Synchronous Mode Leased Line Dial Up The Series II Modem can function in the IBM AS 400 environment appearing like an IBM 5853 modem First DIP Switch 7 must be placed in the UP position This establishes an RTS CTS condition state typical
173. t may not be correct Check the cable description on the packaging to make sure the cable is the right one for your computer e Peripheral expansion cards such as bus mouse and sound cards may include a serial port pre configured as COM1 or COM2 The extra serial port or the card itself may use the same COM port memory address or interrupt request IRQ as your communica tions port Be sure to disable any unused ports To look for address or IRQ conflicts if you use Windows 3 1x select File Run in Program Manager type MSD and press ENTER Then select Mouse COM Ports and IRQ Status and note the addresses and IRQs that are in use If you find an IRQ conflict note which IRQs are not being used then change one of the conflicting devices to use one of the unused IRQs If you find an address conflict change the address of one of the conflicting devices To change a port address or IRQ in Windows 3 1x double click the Control Panel icon then the Ports icon Click on the port you want to change click Settings click Advanced and select the new port address and or interrupt If you wish to use COM3 or COM4 note that COM3 shares an IRQ with COM1 as does COM4 with COM2 so you should change their IRQs to unused ones if possible If you use Windows 95 right click on My Computer select Proper ties from the menu click on the Device Manager tab double click on Ports then double click on the Communications Port your modem is connec
174. t the Digital Loopback Test remote automatic toggle the front panel Answ Orig switch to the Answer position Computer or Terminal Computer or Terminal Local Series Local Series II Modem II Modem digital analog Type ATUO or ATUT hit ENTER Figure 8 7 Synchronous Mode Digital Loopback Test remote automatic 9 DIP Switch Settings 9 1 Introduction There are several DIP Switch options on the Series II Modem s printed circuit PC board The DIP Switches are accessible through a cut out on the side of the modem This chapter explains the Modem printed circuit board options Sixteen DIP Switch settings and the modem s speaker volume control are explained in detail including all default settings FRONT Power switch Speaker Power jack LEDs RS 232 V 24 connector Volume knob Line jack 16 position DIP switch Phone jack switch with 1234567 8 9101112 13141516 Answ Orig Figure 9 1 Series II Modem 336 MD1641A PC Board SERIES II INTELLIGENT DATA FAX MODEMS FRONT Power switch Speaker Power jack 7999 7 6 LEDs RS 232 V 24 connector Volume knob Leased ine jack 16 position DIP switch Dialup jack Voice Data Phone jack switch with amp _ 1234567 8 9101112 13 14 1516 Answ Orig REAR Figure 9 2 Series II Modem 336 MD1640A PC Board 9 2 DIP Switch Option Settings Switch 1 Forced DTR DTR Asynchronous Synchronous Mode Leased Line Dial Up The
175. t the Series II Modem to respond with Result Codes according to the Series IT command response set Switch 11 in the DOWN position or to AT command response set Switch 11 in the UP position The amp Q command performs the same function choosing AT or Series II Result Codes and is explained further in section 5 3 of this manual AT Responses amp Q1 Switch 11 UP Series II Responses amp Q0 Switch 11 DOWN Factory Default Setting DOWN Switch 11 Internal External Clocking Synchronous Mode Leased Line Dial Up In Synchronous mode the transmit clock can be supplied by the DTE on pin 24 of the RS 232C V 24 interface by placing DIP Switch 11 UP Place DIP Switch 11 in the DOWN position to enable DCE to control clocking internal clock via pins 15 and 17 of the RS 232 V 24 interface External Clock pin 24 Switch 11 UP Internal Clock pins 15 17 Switch 11 DOWN Factory Default Setting DOWN CHAPTER 9 DIP Switch Settings Switch 12 Asynchronous Synchronous Operation Sync Asynchronous Synchronous Mode Leased Line Dial Up The Series II Modem can operate in either Asynchronous mode or Synchronous mode In Synchronous mode start and stop bits are eliminated The modem s internal clock circuits on the RS 232C V 24 pins 15 and 17 are activated The Series II Modem s Command mode is not accessible in Synchronous mode This switch is a means to alternate and to access either mo
176. t you yourself would answer instead of the modem Place DIP Switch 5 in the UP position to enable Auto Answer Place DIP Switch 5 in the DOWN position to disable Auto Answer Auto Answer Enabled Switch 5 UP Auto Answer Disabled Switch 5 DOWN Factory Default Setting UP Switch 5 Originate Answer Mode Asynchronous Synchronous Mode Leased Line The Series II Modem functions in either Originate mode or Answer mode Place DIP Switch 5 in the DOWN position to enable Originate mode Place DIP Switch 5 in the UP position to enable Answer mode SERIES II INTELLIGENT DATA FAX MODEMS Originate Mode Enabled Switch 5 DOWN Answer Mode Enabled Switch 5 UP Factory Default Setting UP Switch 6 Maximum Throughput Setting Asynchronous Mode Leased Line Dial Up Some applications require you to dial into services with maximum throughput on and other applications where maximum throughput must be off i e service not supporting error correction or the V 42 handshake interferes with logon sequence DIP Switch 6 is used for switching between these two modes This DIP Switch controls three important parameters error correction speed conversion and serial port speed which in effect enables or disables maximum throughput Maximum Throughput Enabled Switch 6 UP Maximum Throughput Disabled Switch 6 DOWN Factory Default Setting UP Switch 6 Slave Clocking Synchronous Mode Leased Line Dial Up In Synchronous
177. ted to In the port s Properties sheet click on the Resources tab to see the port s Input Output range and Interrupt Request If another device is using the same address range or IRQ SERIES II INTELLIGENT DATA FAX MODEMS it will appear in the Conflicting Device List Uncheck Use Automatic Settings to change the port s settings so they do not conflict with the other device or select the port the conflicting device is on and change it instead If you need to open your computer to change switches or jumpers on the conflicting device refer to the device s documentation e The serial port may be defective If you have another serial port install the modem on it change the COM port setting in your soft ware and try again e The modem may be defective If you have another Series II Modem try swapping modems If the problem goes away the first modem is possibly defective Call Tech Support for assistance see Section A 2 The Modem Dials But Cannot Make a Connection There can be several reasons the Series II Modem fails to make a con nection Possibilities include e lack of a physical connection to the telephone line e awrong dial tone e a busy signal e awrong number e no modem at the other end a faulty modem computer or software at the other end e incompatibility between modems You can narrow the list of possibilities by using extended result codes To enable them enter ATV1X4 and press ENTER while
178. the AT command set and the ITU V 25 bis standard for sunchronous dialing It also features ITU V 42 error correction and V 42bis data compression providing 100 error free data transmission V 42 error correction incorporates MNP Classes 3 and 4 and LAP M You may select V 42bis data compression for 4 1 throughput or MNP Class 5 for 2 1 throughput CHAPTER 1 Introduction and Description Your Series II Modem offers interactive automatic dialing as well as Command Mode option configuration You may store up to ten command line telephone numbers of up to 60 characters each in the modem s nonvolatile memory The modem pulse or tone dials and recognizes dial tones and busy signals for reliable call progress detection The modem can detect AT amp T calling card tones It is FCC Registered for connection to telephone networks without any Data Access Arrangements DAA s Your modem also features Callback Security to protect networks from unauthorized use and to manage phone line costs By using the modem s phone number and password directory a host site can upon receipt of a call callback to a remote site at a predetermined number Remote Configuration permits you to assist users at remote sites saving you the time and trouble of site visits and preventing misinterpretation of configuration instructions In addition the major application for the 336 MD1640A model of the Series IT Modem is in 4 wire leased line netw
179. the modem to go on hook after a disconnect A cleardown makes a disconnect by the remote modem easier to detect and a subsequent re connection more likely Enter AT amp CD0 amp W0 lt CR gt to execute a cleardown at disconnect default and enter AT amp CD1 amp W0 lt CR gt to disable the cleardown function SERIES II INTELLIGENT DATA FAX MODEMS Auto Speed Detect A The function of the A command is to detect and select the operational data rates the starting speeds with which the Series II Modem uses for initial handshake and speed selection Remember this command does not control the originating data rate of the modem that is done by the Modem Baud Rate command MBn but only the Answer mode starting speeds Entering AT A0 or AT A causes the Modem to operate starting at 33 600 bps with fallback to 28 800 to 19 200 to 14 400 to 9600 to 4800 to 2400 to 1200 and to 300 bps Entering AT AT7 causes 33 600 bps operation only Entering AT A2 causes the modem to operate at starting speeds of 33 600 bps with incremental fallback to 28 800 19 200 14 400 9600 and 4800 bps The AT A3 command causes the modem to begin operation as a V 22bis modem at 2400 bps with fallback to 1200 to 300 bps AT A0 is the factory default value 5 4 7 RS232C Interface Control Commands Carrier Detect Control amp C The amp C command allows you to control the status of the Carrier Detect signal CD Pin 8 on the RS232C line You have f
180. the other modem so that it will be the originating modem Again it doesn t matter which is which as long as the local and remote modems have opposite settings 7 Verify transmit dBm levels The transmit level for dial up lines is 11dBm The transmit level for leased lines is 9 dBm and may be set alternately to 15 dBm with DIP Switch 3 8 Verify remote modem s current configuration settings with your Series II Modem in terms of data compression error correction transmission rate etc per Chapter 5 Section 5 7 12 ATL5 and ATL7 Commands 9 Make sure modem and computer terminal serial port baud rates are adjusted Note that several programs can check this for you If you have MS DOS 5 0 or higher a program called MSD EXE Microsoft Diagnostics is in your DOS directory Typing MSD at the DOS prompt brings up a screen that provides a variety of information about your computer Select COM ports and it lists information about your com port e g UART Type Address and IRQ to name a few Once you know your serial port s UART type you can set your communications s software appropriately 10 Verify self test results Section 2 2 11 Proceed to Chapter 3 of this manual or to your data communica tions software manual CHAPTER 2 Installation and Connection Note Appendix A lists some basic and specific troubleshooting actions to take if your Modem is not operational 2 3 Is Your Series Il Modem Ready for Use As
181. through your modem and over the phone line to the remote modem where they are then looped back to your modem See Figure 8 3 The test procedure is as follows 1 Go into Terminal mode Type AT and hit ENTER you should get an OK message 2 Dial the remote modem by entering the Dial command and the phone number to establish On line mode Note The amp 74 command must be set on the remote modem to run this test Computer Computer or Terminal or Terminal Local Series II Remote Series II Modem Modem f analog l digital I digital analog I Type AT in Terminal mode hit ENTER dial remote modem establish On line mode enter escape sequence type ATU2 and hit ENTER Figure 8 3 Digital Loopback Test remote automatic CHAPTER 8 Modem Testing 3 Type the Escape Sequence AT lt CR gt or lt BREAK gt AT lt CR gt which brings your modem into Command mode while still main taining the connection with the remote modem 4 Type ATU2 and hit ENTER The local modem responds to this command by transmitting an unscrambled marking signal which causes the remote modem to place itself in Digital Loopback mode Then the local modem exits Command mode and enters pseudo On line mode 5 Type data from your keyboard For this test typing multiple upper case U characters is a good way to send an alternating test pattern of ones and zeros The data received by the remote modem will enter its analog receiver
182. thru 9 o Exit Command Mode and go into On Line Mode APPENDIX C Command Summary P In Dial Comd Modem will pulse dial numbers following the P amp Pn n 0Oorl amp PO means 60 40 pulse ratio amp P1 means 67 33 pulse ratio Pno n 0 1 or2 P0 selects no parity P1 selects odd parity P2 selects even parity Factory Default Setting Command _ Values Description Qn n 0 1lor2 Q0 means Result Codes sent QI means Result Codes will be suppressed quiet Q2 means Dumb Answer Mode amp Qn n 0orl amp Q0 selects Series II command set amp Q1 selects AT command set Rn n O0orl RO means modem will not reverse modes In Dial Comd R1 means modem will reverse modes amp Rn n 0 lor2 amp RO lets Clear to Send act normally amp R1 forces Clear to Send on amp R2 drops for 1 second on disconnect amp RP Command Initiates a Retrain that makes the processor read Line Probe Information valid only in V 34 mode Rn n O0orl RO means disconnect after 12 retransmits R1 means do not disconnect after 12 retransmits amp RFn n Oorl amp RFO selects CTS follows RTS amp RF1 selects CTS to act independently Factory Default Setting SERIES II INTELLIGENT DATA FAX MODEMS Command _ Values Description Sr n r 0 11 13 Sets value of Register r to value of n 15 19 24 26 where n is entered in Decimal format 29 30 32 34 Sr r 0 11 13 Reads value of Register r
183. to and for the modem to respond with OK to The E com mand is used to select these options as follows EO Modem Won t Escape E1 AT lt CR gt Method default E2 Break Method E3 Either or Break Methods E4 No OK Response to ES OK Response to The E4 and E5 commands enable or disable an OK response which is required by some software packages during an escape sequence SERIES II INTELLIGENT DATA FAX MODEMS Force Answer Mode A You can force the Series II Modem into Answer mode with the modem s A command Entering ATA when in Command mode immediately brings your mo dem off hook out of Command mode and into On Line Answer mode and causes it to transmit its carrier signal over the phone line If no responding carrier tone is received by your modem within forty five seconds or some other time as determined by S Register S7 your modem stops transmitting its tone hangs up and goes back into Command mode Exiting Command Mode Going Back On Line O You can bring the Series II Modem out of Command mode and back into On Line mode by entering ATO where O is the letter O not the number 0 In this case the O command reverses what was done by entering the Escape Code The O command will bring the modem into the same On Line mode Originate or Answer that it was in prior to going into Command mode 5 4 13 Line Probe Commands Before V 34 negotiation takes place rem
184. to the Originate position and Bill would switch his up to Answer This switches your modem to the originate on line mode and Bill s to the Answer on line mode You would both then hang up your telephone handsets and continue the conversation via your keyboards 4 10 Handshaking Details This section briefly explains what happens between two modems in a normal call We are assuming that there are Series II Modems at both the originating and at the answering end of the telephone line If other brands of modems are used with our modems they will still communicate but each manufacturer tends to use slightly different delay timings and sequences and many of the brands vary in their LED designations SERIES II INTELLIGENT DATA FAX MODEMS When a call is dialed from the originating modem the called modem responds to the ringing by switching into Answer mode and by turning on its RI Ring Indicator RS 232C V 24 Pin 22 signal as the rings are detected The Modem MAC does not use DTR Note that in order for the called modem to be able to answer the call it must have a high DTR Data Terminal Ready signal This signal comes from the computer or terminal to which it is attached on RS232C Pin 20 When the called modem answers the call its OH Off Hook circuit comes on and the ringing stops Two seconds after the call is answered the called modem begins transmitting its answerback tone The originating modem which has been off ho
185. todialing and all other Command Mode features until Chapter 5 4 7 Manual Call Origination You can use the Series II Modem to both originate and answer calls To originate calls in Asynchronous mode you will most likely use the Modem s Command mode and give the modem automatic dialing commands we will delay our discussion of the Command mode until Chapter 5 When using your modem in Synchronous mode the Command mode is disabled so you must automatically dial your calls with a telephone set To use manual dialing you first connect an ordinary telephone set either touch tone or rotary dial to the modem s PHONE Jack if you have not already done so Next set the speed selection DIP Switches 13 and 14 to the speed at which you wish to communicate These DIP Switches are located on the side of the modem Refer to Chapter 9 for DIP Switch settings Your computer or terminal may be set for up to 115 200 bps When your telephone set is connected you can use it to dial the modem you wish to call Simply dial the number and then listen to the dialed modem s answer tone When you hear it press the Voice Data switch on the front of the modem down to the Originate position You don t have to hold it down Just toggle it press it once and let it go SERIES II INTELLIGENT DATA FAX MODEMS Once you press the switch the tone you hear should change to another pitch or change into a rough sounding scrambled noise You then repl
186. tory it can be ordered connected as an option If pin 25 is connected and is brought high the modem will be placed Off Hook and busy to incoming calls SERIES II INTELLIGENT DATA FAX MODEMS Appendix J Regulatory Information FCC and IC EMI RFI Statements When correctly installed and maintained the modem will present no hazard to the user When correctly installed the modem will be connected to the PSTN or a PW and to a Data Terminal Equipment DTE whose modem connections comply with ITU recommendation V28 The DTE connections are therefore taken to be safe voltages less than 30 volts This equipment generates uses and can radiate radio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio communication It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s author
187. tring AT amp F X4 amp E13 amp D0 M Add S0 0 to both strings to disable auto answer if the Series II Modem is on a voice line You can store the initialization string in nonvolatile memory With your communications software open and connected to the modem s COM port type the initialization string in the terminal window substituting a carriage return for M To store the string enter AT amp F9 amp W0 lt CR gt Now you can initialize your modem with the following simple string AT Z 4M 3 6 Configuring Software for Your Computer You must configure your communications software to match your com puter s configuration If the Series IT Modem is connected to the COM2 serial port you must tell the software you are using COM2 Another important parameter is the serial port baud rate This is the speed at which your modem communicates with your computer not the speed at which your modem communicates with another modem When V 42bis data compression is enabled you must have a serial port baud rate four times the transmission speed of the modem to fully optimize compression So if your UART is fast enough you should set the serial port baud rate to a minimum of four times the top speed of your modem If you have an 8250 UART your most reliable serial port speed will be 9600 bps if you have an 8250A or a 16450 UART try 19 200 bps if you have a 16550 UART or equivalent a serial port setting of 115 200 bps can be set reliabl
188. ts all current operating parameters L6 L6 lists all current S Register values L7 L7 lists additional parameters L8 L8 lists On Line Diagnostics L9 L9 Displays Signal Strength Information L10 L10 Displays Signal to Noise Ratio Information L11 L11 Displays Noise Information SERIES II INTELLIGENT DATA FAX MODEMS Ln n 0Othru3 LO means modems negotiate V 42 Mode L1 means MNP on and LAP M off L2 means LAP M on and MNP off L3 means no detection phase but go directly to LAP M Factory Default Setting Command _ Values Description Mn n 0 thru 3 MO means Monitor speaker always Off M1 means Monitor speaker On until carrier detected M2 means Monitor speaker always On M3 Monitor speaker on during dialing off during handshaking MBn n speed MB300 selects 300 bps on line MB1200 selects 1200 bps on line MB2400 selects 2400 bps on line MB4800 selects 4800 bps on line MB9600 selects 9600 bps on line MB14400 selects 14400 bps on line MB19200 selects 19200 bps on line MB28800 selects 28800 bps on line MB33600 selects 33600 bps on line XG B A A G A HA A amp Mh n 0orl1 amp M0 selects Async when on line amp M1 selects Sync when on line Nd d 0 thru 9 Dial stored telephone number d Do not include the letter D in this command NdNe d 0 thru 9 Number Linking If first number dialed a e any other is busy another stored number e may number 0 be automatically dialed
189. ttempts Unit Failed attempts Range 0 255 Default 0 Description S26 counts the number of times there has been a failed password attempt For example if you entered ATS26 and the message 003 were displayed it would mean that someone has failed three times to gain access to your modem using its password security system S29 Local Inactivity Timer Unit Minutes Range 1 255 Default 20 Description S29 defines the amount of idle time that can elapse between AT commands after the SETUP password has been entered If this timer expires the LOGIN and SETUP passwords will have to be re entered S29 only takes effect when the modem has been sent a DB1 command which secures the modem from local and remote con figuration or dialing i e no AT commands can be sent until the LOGIN and SETUP passwords have been entered SERIES II INTELLIGENT DATA FAX MODEMS 30 Inactivity Timer Unit Minutes Range 0 255 Default 0 Description S30 causes the modem to disconnect if no data is transmitted or received for a specified time This timer runs during both Reliable and Normal error correction connections The timer restarts any time a data character is passed through the serial port either sent or received If noise on the phone line causes an error to be received during Normal mode this also restarts the timer The inactivity timer is disabled by setting S30 to zero which is the factory default setting 32 Time El
190. ummary V 25bis Commands Command Description Vn VO returns modem to AT command mode when in V 25bis mode V1 enables V 25bis mode of operation V2 allows modem to receive one V 25bis command while in AT command mode without leaving AT command mode V5 DSR follows DTR in V 25bis mode V6 DSR does not follow DTR in V 25bis mode CSPs Changes the serial bps rate CSP0300 300 bps CSP1200 1200 bps CSP2400 2400 bps CSP4800 4800 bps CSP9600 9600 bps CSP19200 19200 bps CSP38400 38400 bps CSP57600 57600 bps CSP115200 115200 bps CRNdd Dials phone number dd where dd can be up to 20 characters 0 through 9 P T and Phone number is checked against the Delayed and Forbidden Number lists before dialed CRidd nn Dials dd same as CRN Command and ignores nn identification string The disregard or connect to incoming calls commands are used for auto answer operations DIC or CIC DIC stops the modem from answering incoming calls CIC causes the modem to answer incoming calls SERIES II INTELLIGENT DATA FAX MODEMS Appendix D DIP Switch Summary Asynchronous Mode DIP Switch Condition Effect 1 UP DTR dependent on interface Down DTR forced On at all times 2 UP Hardware Flow Control Down Xon Xoff Flow Control 3 UP 15 dB Transmission leased line Down 9 dB Transmission leased line 4 UP UUCP Spoofing Off Down UUCP Spoofing On 5 UP Automatic Answer On Down Automat
191. vel 11dBm dial up 9 or 15 dBm leased line dBm level selectable with DIP Switch 3 in leased line setting Frequency Stability 0 01 Receiver Sensitivity AGC Dynamic Range Interface Connectors Diagnostics Indicators Controls Speaker Operating Temperature Power Requirements Dimensions Weight CHAPTER 1 Introduction and Description 43 dBm under worst case conditions 43 dB EIA RS 232C ITU V 24 Both models 1 DB25 female for RS232C 1 RJ 11 female for phone hadset 1 Power inlet 336 MD1640A model only 1 RJ 11 female for dialup line 1 RJ 11 female for 2 or 4 wire leased line 336 MD1641A model only 1 RJ 11 female for dialup line or 2 wire leased line Power on Self Test Local Analog Loop Local Digital Loop Remote Digital Loop Back to Back Test All front mounted LEDs Both models Transmit Data Receive Data Carrier Detect Speed Indicators Off Hook Terminal Ready Error Correction and Fax 336 MD1640A model only Error Toggle switches for Power and for Voice Data with Originate or Answer DIP Switches for various modem options and volume knob Speaker for call progress monitoring 0 to 50 C 32 to 120 F 115 VAC 60Hz 0 3amp 2 prong outlet mounted transformer 1 38 H x 6 2 W x 9 D 3 5 x 15 6 x 22 9 cm 1 6 pounds 0 7 kg without transformer 2 6 pounds 1 2 kg with transformer SERIES II INTELLIGENT DATA FAX MODEMS 1 7 Power
192. ween next 4 retries 3 After 9 retries the number is put on the forbidden list 4 120 minute timer is started on entry to delay list 5 When it runs out the number is removed from which ever list itison c Auto Answer mode behavior 1 Auto Answer in 5 seconds if no DIC 2 Get 10 seconds after DIC to enter CIC 3 If 10 seconds times out then no connection is possible SERIES II INTELLIGENT DATA FAX MODEMS 2 Switzerland a Command Indication modification 1 Modem must remain on hook for 5 seconds after disconnect 2 Modem must remain on hook for 5 minutes after 4 consecutive failed calls 3 If modem must remain on hook then it is paused 4 If the modem is paused and a call is attempted a PAU indication is given a PAUt Modem is paused for t minutes b Delayed and Forbidden list behavior 1 2 minute delay between 4 retries 2 After 4 retries the number is put on the forbidden list 3 The number remains on the forbidden list forever c Auto Answer behavior 1 Auto Answer mode after 2 rings if no DIC 3 Austria a Command Indication modification none b Delayed and Forbidden list behavior 1 No delay between retries 2 After 2 retries to numbers that answer but give no answer tone CFINT the number is put on the forbidden list 3 After 10 retries with busy or no dialtone the number is put on the forbidden list 4 The number remains on the forbidden list forever 5 Delayed and Forbidden Numbers lists are
193. wire leased line wall jack or terminal if you re connecting to a leased line refer to Figure 2 2 on the next page 336 MD1640A models only For four wire lines the modem uses pins 1 and 6 to transmit and pins 2 and 5 to receive PHONE LINE INTERFACE VOLUME INTERFACE 2 Gm Ms VOLUME power OFF Figure 2 2 Series II Modem 336 MD1640A Connections SERIES II INTELLIGENT DATA FAX MODEMS 2 Attach your Modem to your PC or terminal with an RS 232 or V 24 cable 3 Connect telephone set to phone jack if desired 4 Attach your Modem to the AC Power transformer and plug t he AC connector into a live AC outlet 5 Turn on power by flipping the ON OFF switch at the left rear of the Modem to the ON position 6 Assuming you have already chosen Dial Up mode DIP Switch 10 in the UP OPEN position or Leased Line mode DIP Switch 10 in the DOWN CLOSED position assign your modem to either originate or answer mode It doesn t matter which mode you select just give the modem you re connecting to the opposite setting For example if you place DIP Switch 5 UP that modem will be the answering modem Then you should place DIP Switch 5 DOWN on
194. with the modem in Normal mode error correction off Computer Computer or Terminal or Terminal Local Series II Remote Series II Modem Modem 1 1 digital i analog analog i digital I I Type AT in Terminal mode hit ENTER dial remote modem establish On line mode enter escape sequence type ATU3 and hit ENTER Figure 8 2 Digital Loopback Test local manual CHAPTER 8 Modem Testing In this test the local modem is placed in Digital Loopback mode Data is entered and transmitted from the remote modem which is not in digital loopback mode sent across the phone line to the local modem and looped back to the remote modem The test procedure is as follows 1 Go into Terminal mode Type AT and hit ENTER you should get an OK message 2 Dial the remote modem by entering the Dial command and the phone number to establish On line mode 3 Type the Escape Sequence AT lt CR gt or lt BREAK gt AT lt CR gt which brings your modem into Command mode while still main taining the pseudo On line mode with the remote modem 4 Type ATU3 from the local PC and hit ENTER Once you receive an OK message from your modem if responses are enabled the local modem is placed in Digital Loopback mode 5 Data is typed from the remote keyboard For this test typing multiple upper case U characters is a good way to send an alter nating test pattern of ones and zeros The data received by the local modem will enter it
195. wo is the Basic set provides one response CONNECT to indicate a connection while the Extended set provides several responses for different speeds CONNECT CONNECT 2400 CONNECT 4800 CONNECT 9600 CONNECT 14400 CONNECT 19200 CONNECT 21600 Etc When the Extended set is chosen you also have the option of matching them up with Standard AT 2400 response code sets by including or not including the BUSY and or NO DIAL TONE responses while excluding the DIAL TONE response The X command is used to select which responses are provided CHAPTER 5 Command Mode Regarding the Series II Modem s method of dialing the Modem can detect standard dial tones and busy signals This capability smart dialing allows the modem to wait for a dial tone and when one is detected to begin dialing immediately The Modem also can detect a distant busy signal if after dialing it reaches a busy number This is useful because it allows the modem to immediately abandon a call rather than wait 45 seconds for a carrier signal that will never come S Register S7 defines the wait for carrier time refer to Chapter 6 The Series II Modem gives you a choice between the wait for dial tone smart method we just described and blind dumb dialing where instead of detecting actual dial tones the modem relies on timed pauses When the wait for dial tone method is chosen the busy signal detection capability is also activated The X command
196. y 3 6 1 Configuring Software for the Remote System You must meet the requirements of the remote system for successful communications Though the Series II Modem can automatically match the speed of the other modem you must specify parameters such as type of flow control break length number of data bits number of stop bits and parity If you set these parameters incorrectly with the remote system gibberish will appear on your screen 3 6 2 Terminal Emulation If you are accessing the remote computer as if from an on site terminal the keyboard codes used by your computer may not match the ones used by the remote computer To be compatible with the remote com puter your software must be able to substitute the appropriate codes in what is known as terminal emulation Most communications programs can emulate the most common mainframe terminals including the DEC VT100 VT102 and VT52 terminals and the basic TTY mode If in doubt about which to choose for a Telnet session a BBS connection etc try ANSI or VT100 first 3 6 3 File Transfer Protocols When you upload or download files with your Series II Modem through a browser it will transparently use the appropriate protocol usually http or ftp When you are uploading or downloading through a terminal emulator however the host computer will ask which file transfer protocol you want to use Most communications programs allow you to choose a default protocol Your software s
197. your RS232C cable Pins 15 and 17 are necessary only for synchronous operation Also known as DTR Data Terminal Ready The computer or terminal should be supplied with a cable terminated with a Cinch DB25P or equivalent connector mounted in a Cinch DB51226 1 or equivalent hood assembly as specified by the EIA RS232C standard Functional Description of RS232C Signals Transmitted Data Pin 2 SD BA Direction to modem Signals on this circuit are generated by the customer s terminal and transferred to the transmitter of the Series II Modem A positive signal is a space binary 0 and a negative signal is a mark binary 1 The transmitting terminal should hold this line in the marking state when no data is being transmitted including intervals between characters or words The TRANSMIT XMT LED indicates the status of this circuit Received Data Pin 3 RD BB Direction from modem The lead is the data output of the modem Data signals received from the remote modem are presented on this line When no carrier signal is being received pin 8 negative this line will be forced into a marking condition The RECEIVE RCV LED indicates the status of this signal Request To Send Pin 4 RTS CA Direction to modem The RTS signal indicates to the modem that the computer or terminal has data that it wants to transmit APPENDIX I RS232C Interface Specifications Clear To Send Pin 5 CTS CB Direction from mod

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