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TRON DF56.0 User manual

1. TRON DF56 0 UK 1 3 Function of the modem We have seen that computers can exchange information through the serial port if both sides stick to a number of agreements With a direct connection of two serial ports it is only possible to bridge a limited distance about 50 feet or 15 metres The telephone network is used to bridge a greater distance It is an existing infrastructure by which connections can be established all over the world However the telephone network is not suitable to process digital signals Only analog signals voice can be processed correctly Technically this can be solved as follows the sender converts modulates the digital signals of the serial port into analog signals that are suitable for the telephone line The receiver converts demodulates these analog signals again into digital ones and sends these to its serial port We call the device that can carry out these conversions a modem MOdulator DEModulator Amodem s function is therefore the coversion of digital RS232C into analog signals and vice versa However with communication through a telephone line a number of additional agreements are necessary 1 It must be possible to establish a connection automatically see paragraph 1 4 2 The analog signal has to meet international agreements see paragraph 1 5 1 4 Setting up a connection Building up a data connection through the telephone line can be done in two different ways 1 The easies
2. a The connection will become permanent The connection is transparent and the carrier signal at the serial port becomes active or b The modems disconnect The TRON DF56 0 calls back the telephone number which belongs to the password The modem which is called back has to be in ESPE Allied Data Technologies TRON DF56 0 UK Auto answer mode answers and the connection is established definitely If the line is busy when calling back or when the modem does not answer the Tron DF56 0 does not try again 5 5 Remote configuration optional Remote Configuration means configurate from a distance You can use any modem to configurate the TRON DF56 0 modem The command to make remote configuration possible is ATS80 65 remote configuration is possible ATS80 1 remote configuration not possible NOTE Assure that bit 0 always remains 1 To make the changes to S80 effective you should reset the modem This can be done with the ATZ command or by switching the modem off and on again In order to avoid others configurating the modem from a distance this function is protected by a password The factory setting for the password is SECRET We recommend that you change the password before you use remote configuration Use the AT C command to alter the password To change the password the old password must be entered first After that the new password must be entered twice The minimum length for the password is 6 characte
3. 57 Remote 36 39 50 Reset 18 44 Response 18 37 49 RING 21 RTS 29 30 38 51 53 56 66 S Serial port 66 Speed 52 53 54 66 Synchronous 37 T Terminal 25 Test 39 51 Tone dialling 49 68 Transparent 56 V V FC 67 V21 66 V22 66 V22bis 66 V23 66 V32 66 V32bis 66 V34 66 67 V42 31 36 55 56 58 66 V42bis 22 57 66 Verbose 18 39 49 X Xon Xoff 29 30 56 66 TRON DF56 0 Allied Data TECHNOLOGIES Head office Allied Data Technologies bv Allied Data Technologies UK Allied Data Technologies Belgium P O Box 788 4 Lake End Court Veldlei 1 3200 AS Spijkenisse Taplow 2970 s Gravenwezel The Netherlands Maiden Head Belgium Berkshire Tel 31 0 181 611 522 SL6 OJQ Tel 82 0 3 6855228 Fax 31 0 181 614 840 United Kingdom Fax 82 0 3 6855231 E mail info allieddata nl Tel 44 0 1628 660644 Website www allieddata nl Fax 44 0 1628 660688 Manufacturing Allied Data Technologies Germany Allied Data Technologies Thailand Rheinstrasse 7 41836 Huckelhoven Germany Tel 49 0 2433 970175 Fax 49 0 2433 970179
4. MOD Modulation V32 V34 MOD is omitted for all other modulations PROT ErrorCorrection NONE LAPM ALT COMP Compression NONE CLASS5 V42BIS Linespeed Speed on the line Asymmetric speeds are displays separately Allied Data Technologies UK TRON DF56 0 ATW AT amp W ATX Example A typical example of a Single line connect message for a V 34 connection is CONNECT 115200 V34 LAPM V42BIS 31200 TX 33600 RX Extended response This command is used to select the information sent after the CONNECT message see also S95 0 The CONNECT message is followed by the terminal speed 1 The CONNECT message is followed by the line speed the error correction protocol and the terminal speed 2 The CONNECT message is followed by the line speed default NOTE The setting of s register 95 overrides the setting of the ATW command Save configuration This command is used to save the current modem settings in memory Two different sets of settings can be stored 0 The settings are saved as set 0 1 The settings are saved as set 1 See commands AT amp Y and ATZ for more information Dial and busy tone detection and responses This command is used to specify whether only the CONNECT message or the speed too should be displayed lt can also be used to switch off detection of dial and busy tones If you want to use dial tone detection when it is switched off add a W to the telephone number 0 dial tone
5. Ambient conditions Mains voltage 230V 50 60Hz 5VA 15 10 Temperature Operation 5 C to 60 C Storage 20 C to 70 C Humidity Operation 10 to 75 Storage 5 to 95 Dimensions 60 x 170 x 160 mm w x xh Weight 850 gramms without cable Sender and receiver Modulation V21 V23 and Bell 103 V27ter V22 V22bis V29 V32 bis Bell212A V17 V32 V32bis V34 K56Flex V90 PSTN CTR21 Send level 11 dBm 1 dB 300 3400Hz Receive level switch on gt 41 dBm 1 dB switch off lt 46 dBm 1 dB Impedance and symmetry Impedance according to TBR 21 300 3400 Hz current dependent 0 Hz 16 60 mA Earth symmetry gt 46 dB Allied Data Technologies TRON DF56 0 Echo damping Ring detection Dial tone detection Tone dialling DTMF Electrical safety gt 20 dB 300 3400 Hz sensitivity connect delay impedance capacity sensitivity wait time send level column send level row tone length pause length 30 Veff 23 62 Hz 180 ms gt 50 kQ 300 3400 Hz gt 10 MQ 0 Hz lt 0 1 uF 25 Hz 60 mV 2 V 340 550 Hz 5 60 seconds 10 dBm 1 dB 12 dBm 1 dB 90 ms 5 ms 90 ms 5 ms Class II TRON DF56 0 APPENDIX B Website and Bulletin Board To support users of ADT data communications equipment Allied Data Technologies has set up a Website on the Internet and a bulletin board system BBS You can call these for questions and information Y
6. AT amp K4 5 Transparent Xon flow control AT amp K5 6 RTS CTS and Xon Xoff flow control AT amp K6 Bit 3 7 reserved S40 105 Bitmap register Bit 0 Bit 1 Bit 2 0 1 0 Extended Services MNP10 0 Conversion from V42 to MNP10 off AT KO 0 Conversion from V42 to MNP10 on AT K1 0 1 0 MNP10 send level adjustment 0 Automatic AT MO 1 Forced adjustment AT M1 0 1 0 MNP negotiation speed 0 Fastest possible speed AT HO Allied Data Technologies TRON DF56 0 JK 1 Negotiate at 1200 bps AT H1 Bit3 5 0 5 5 Break signal processing 0 AT KO 1 AT K1 2 AT K2 3 AT K3 4 AT K4 5 AT K5 Bit6 7 0 3 3 MNP block size 0 64 characters AT A0 1 128 characters AT A1 2 192 characters AT A2 3 256 characters AT A3 S41 131 Bitmap register pit valu Detaut Description Bit0 1 0 3 3 Compression setting 0 Off AT CO 1 MNP5 AT C1 2 V42bis AT C2 3 MNP5 or V42bis AT C3 Bit 2 0 1 0 Auto retrain 0 Off AT EO 1 On AT E1 Bit 3 0 1 0 Modem modem flow control 0 Off AT GO 1 On AT G1 Bit 4 0 1 0 MNP block mode 0 Flow mode AT LO 1 Block mode AT L1 Bit 5 7 4 Reserved TRON DF56 0 S46 138 136 138 Data compression 136 Data compression on 138 Data compression off S48 007 0 7 128 V42 negotiation 0 LAPM connection without negotiation i Negotiation stage Link Request on 128 No negotiation stage forced fallback as specified in S36 95 033 Ex
7. and busy tone detection off message CONNECT 1 dial tone and busy tone detection off message CONNECT and speed Allied Data Technologies TRON DF56 0 UK ATEX AT X ATY AT amp Y 2 dial tone detection on busy tone detection off message CONNECT and speed 3 dial tone detection off busy tone detection on message CONNECT and speed 4 dial tone and busy tone detection on message CONNECT and speed See overview in ATV command and S95 bit 0 Synchronous transmission clock Selects the transmission clock in accordance with the given parameter 0 Internal clock default 1 External clock EXT CLK CT113 2 Slave clock derived from the incoming carrier Exit remote configuration mode optional Use this command to exit remote configuration mode See paragraph 5 5 Remote configuration optional Long space disconnect This command is used to switch long space disconnect on or off 0 Long space disconnect off default 1 Long space disconnect on In no error correction mode the modem sends a space of 4 seconds before disconnecting If the modem receives a space of at least 1 6 seconds the connection is cleared Modem configuration after switching on This command determines which configuration is to be used when the modem is switched on 0 Configurate with stored profile O at power up 1 Configurate with stored profile 1 at power up See the AT amp W command Allied Data Technologies
8. synchronous 0 CTS follows RTS AT amp RO 1 CTS always on AT amp R1 Bit3 4 0 3 1 DTR CT108 control 0 AT amp DO selected 1 AT amp D1 selected 2 AT amp D2 selected 3 AT amp D3 selected Bit 5 0 1 0 DCD CT109 control 0 DCD always on AT amp CO 1 DCD indicates status of carrier AT amp C1 Bit 6 0 1 0 DSR CT107 control 0 DSR always on AT amp SO 1 DSR on after detection of answer tone Bit 7 0 1 0 Long Space Disconnect 0 ATYO selected 1 ATY1 selected Allied Data Technolog TRON DF56 0 22 117 Bitmap register CON Defaut CI BitO 1 0 3 1 Loudspeaker volume 0 Low ATLO 1 Low ATL1 2 Normal ATL2 3 High ATL3 Bit2 3 0 3 1 Loudspeaker on off 0 Off ATMO 1 On during receipt of carrier ATM1 2 Always on ATM2 3 On while establishing connection ATM3 Bit4 6 0 7 7 Result codes 0 ATXO selected 4 ATX1 selected 5 ATX2 selected 6 ATX3 selected 7 ATX4 selected Bit 7 0 1 0 Reserved 23 183 Bitmap register pi CIS CNI Bit 0 0 RDL setting remote digital loopback 0 Not permitted AT amp T5 1 Permitted AT amp T4 Bit 1 3 0 7 3 DTE interface speed 0 0 300 1 600 2 12003 2400 4 4800 S24 S25 S26 TRON DF56 0 COIN 5 9600 6 19200 7 38400 Bit4 5 0 3 3 DTE parity 0 Even 1 Not used 2 Odd 3 None Bit6 7 0 2 2 Guard tone 0 Off AT amp GO 1 Off AT amp G1 2 1800 Hz AT amp G2 Reserved 005 0 255 Inactive D
9. 20 CONNECT 230400 KY ER E 154 CARRIER 40000 du ORS TH RS sak 22 CONNECT 1200TX 75RX do gs Le E 155 CARRIER 42000 ENTE RT 23 CONNECT 75TX 1200RX lE e ra e E 156 CARRIER 44000 ELE si ae NG 24 DELAYED 4 4 4 4 157 CARRIER 46000 By A PR REL 32 BLACKLISTED 4 4 4 4 158 CARRIER 48000 E ct eg SES HI 33 FAX Pr a Naka AG GG 159 CARRIER 50000 ETA E E 35 DATA Big AE RL ER 160 CARRIER 52000 le SR GR E 40 CARRIER 300 Ar Rip VE LG OR 161 CARRIER 54000 Ku OR O NG CE 44 CARRIER 1200 75 By td ISS S5 162 CARRIER 56000 KA HQ TE 45 CARRIER 75 1200 BS m7 OLE C 165 CONNECT 32000 Fo a a 46 CARRIER 1200 KO Kr KU mx 166 CONNECT 34000 Ko GL LE MG R 47 CARRIER 2400 E E 167 CONNECT 36000 E o E OR 48 CARRIER 4800 EE A NE 168 CONNECT 38000 SA NG AY 2 49 CARRIER 7200 dre EA do e 169 CONNECT 40000 O E 50 CARRIER 9600 Bie EO MG ee E 170 CONNECT 42000 E ae 51 CARRIER 12000 By kd ki ka S8 171 CONNECT 44000 RS E E 52 CARRIER 14400 TR Li bukid kis OR 172 CONNECT 46000 dt E 53 CARRIER 16800 SA E E 173 CONNECT 48000 Pa AR a AK 54 CARRIER 19200 A AIR pifi E CE 174 CONNECT 50000 E ck 55 CARRIER 21600 Bi SEN E E 175 CONNECT 52000 Ci e KY Bi 56 CARRIER 24000 ES 176 CONNECT 54000 Pie ps A 57 CARRIER 26400 Ar Br ER E 177 CONNECT 56000 E e K 58 CARRIER 28800 de de abi e CE In a column indicates that the message involved is given when it has been selected with the ATX lt n gt command n is in the top of the columns When the column is empty no message is given at the ATX s
10. Allied Data Technologies TRON DF56 0 UK Other modulation methods are used for a higher communication speed 1200 bps and up Thus at V22 1200 bps full duplex Quadrature Phase Shift Keying QPSK is used at V22bis 2400 bps full duplex Quadrature Amplitude Modulation QAM and at V32bis V 34 33600 bps full duplex Trellis Coded Modulation TCM 1 6 Originate and answer It is necessary to make agreements which modem uses which tone sets For this purpose the terms originate and answer are used The modem that builds up the connection sticks to the originate tones the other one uses the answer tones The originate modem sends as agreed with the low tones and the answer modem with the high tones For a backchannel connection this means that the originate modem sends with the low baudrate and the answer modem with the high baudrate With a full duplex connection both modems use the same baudrate and the tones for 0 and 1 are different 1 7 The modem is transparent We have seen how the two computers can be connected with each other and how the communication takes place When a connection has been established it is possible to send data between both computers The modem only serves to establish the connection after that they are fully transparent Nevertheless sometimes communication can go wrong If you get strange characters on the screen during a connection with a data base the setting of the communication
11. Allied Data Technologies UK TRON DF56 0 MK IN IS V CID K MS M Break control 30 Error correction on off 36 List current configuration 38 Number of signal lines for connection 41 Select Caller Identification 23 MNP extended services MNP10 31 Modulation Selection 33 Adjust send level MNP 10 35 3 5 Explanation of the AT commands In this section the AT commands are described in alphabetical order You will find a list of all the commands in the previous section For each command the factory default setting is given Generally there is no need to change the default setting AT x AT Repeat last command The modem responds to this command as if the previous command had been entered again from the terminal This command must not be preceded by AT or be followed by lt ENTER gt Set S register This command causes the value x to be assigned to the specified S register You can also use the command ATS to set the S register For more information see ATS Read S register This command displays the setting of the selected S register You can use the command AT to set the S register For more information see ATS Allied Data Technologies TRON DF56 0 UK ATA Answers The command ATA puts the modem on line and activates the answer mode If no carrier is detected during the period specified in register S7 default 60 seconds the modem is switched off line Any character entered while the connection is bein
12. Modem Select optional The following only applies if your modem is equipped with the Modem Select option Gs Allied Data Technologies The Modem Select distinguishes incoming modem and telephone calls by means of an agreed procedure The first two rings adjustable with register SO of a call will be suppressed by the Modem Select After that the modem starts to count the seconds until the next incoming RING signal If that RING signal comes within 6 seconds the modem connects the telephone line with the telephone The telephone starts to ring and the call can be answered If it takes longer than 6 seconds before the next RING signal the modem expects a call from another modem In practice this means that the calling modem has to dial the number once disconnect wait 6 seconds and then dial the same number again The second call most be done within 60 seconds The Modem Select is activated by giving register SO the value 102 S0 102 bell is suppressed twice Save the settings by means of the amp W command To establish a connection with a Modem Select modem any TRON modem accepts that you add a L to the telephone number For instance ATD0123 456789L The L indicates that a connection has to be established with a Modem Select modem The number is dialled twice 5 8 DualLine interface optional The Dual Line interface is an extension for the desk model With this extension the TRON DF56 0 can be connected with two t
13. UK TRON DF56 0 ATZ AT amp Z EEE Reset and modem configuration This command resets the modem through the software and the settings from the specified set are loaded 0 Configuration using set O settings 1 Configuration using set 1 settings See the AT amp W command Save telephone number The TRON DF56 0 supports the storage of a maximum of four telephone numbers in non volatile memory The telephone numbers may have a maximum of 40 characters AT amp Zn x n O to 3 x telephone number Escape code When the modem has established a connection and is in data mode it can be switched into command mode This is done by entering three ASCII characters which are set in register S2 default is character There is a time out period before the first character pre sequence time one before the last character post sequence time and a timeout period between the characters inter character time This time is determined by the value of register S12 default 1 second Remote configuration escape code sequence optional Use this escape sequence to enter the Remote configuration mode of a remote TRON DF modem A password must be entered before any commands can be issued The is the default escape character change S202 for a different escape character See paragraph 5 5 Remote configuration optional Allied Data Technologies TRON DF56 0 UK 4 S REGISTERS This chapter describes the meaning
14. and the contents of the S registers Many of these S registers have a specific technical significance It is therefore advisable not to alter the contents of an S register if you do not know what the consequences will be A number of S registers have one meaning function Other registers have several functions and are called bit mapped registers In these registers commands are set at bit level Bit mapped S registers are read only The appropriate AT command which controls the relevant bits in the S register should be used to change the value The next section explains what a bitmap register contains Section 4 2 contains an overview of what each S register does The registers marked with are stored in non volatile memory 4 1 Bit Mapped S registers In the S bitmap registers a function is enabled or disabled 1 means that the bit is on or set 0 means that the bit is off or reset These bits from the binary system represent a decimal value Bit 7 128 6 64 5 32 4 16 3 8 2 4 1 2 and 0 1 By adding up the decimal values of the bits that are set 1 you obtain the value to be entered in the register Bitmap registers are read only Allied Data Technologies UK TRON DF56 0 4 2 Overview of the S registers REG amp W DEFAULT RANGE DESCRIPTION page SO 000 0 99 Auto answer DA S1 000 0 255 Ring signal counter 47 2 7 043 0 255 Escape code character 48 S3 013 0 127 Carriage return character 48 S4 010 0 127 Line feed char
15. bc_speed gt sets the maximum backchannel speed used during V90 and K56flex connections AT M Adjust send level MNP10 This command allows the modem to adjust the send level automatically during an MNP10 connection 0 Standard send level during MNP10 connections default 1 Automatic adjustment of send level during MNP10 connections Allied Data Technologies UK TRON DF56 0 ATN AT N ATO ATP Automatic line speed detection 0 Automatic line speed detection disabled The connection is established according to the contents of register S37 1 Automatic line speed detection enabled This setting is the same as ATFO default Also see the AT MS command Error correction on off This command determines whether or not error correction is performed during a connection There are two protocols for a connection with error correction namely MNP4 and V42 LAPM 0 Only connections without error correction Interspeeder on Forces AT amp Q6 1 This parameter puts the external model into direct mode AT amp Q0 The internal model works with this parameter as with 0 2 Only connections with error correction Forces AT amp Q5 S36 4 S48 7 3 Automatic selection between error correction yes no Connections with error correction are preferred but switching to normal connections is possible Forces AT amp Q5 S36 7 S48 7 default 4 V42 LAPM connections only Forces AT amp Q5 848 0 5 MNP4 connections onl
16. feed Form feed Enquiry Escape Data Link Escape Space Delete TRON DF56 0 The ASCII codes and ASCII control codes their names decimal and hexadecimal formats CTRL CODE NUL SOH STX ETX EOT ENO ACK BEL BS HT LE VT FF CR SO TAMA HDD WT DLE DCI DC2 DC3 DC4 NAK SYN ETB CAN EM SUB ESC FS TANK x 3 lt GCHNnAO vd o BZ ERAN GH RS SP do Ur a DEC 200 J004a0N H oO 0 TI 2 a OU ib WN H Oo HS HAB Od Y GUY W Y UY W Y WWW NN N NN N N N N H N H DO 0 2X II Nm UA a WON FH O 0 Da NA bb WN H QO o HEX O OLOO SS OSO Or LO O SO H UO Hd vuo IN UH ib WN HO o HA HUN EW NGO OD IN NA bh WN H o CODE O 0 IN UA a AW NRO N TA HUN Hd p w Vv GH 2 O DO 2 KH N GH DEC 43 44 45 46 47 48 49 50 51 52 53 54 DI 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 HEX 2B 2C 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3E 3F 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4E 4F 50 51 52 93 54 53 CODE bo 2 N K Kk si lt 1 HANK x s lt Gt MM KOTO O 5 B KH WU H NG Hm DM aaa YS w DEL DEC SH GH RH EH HR HO HEH HR HULO KO 0 OO vo vo 0 o o 00 C 00 OO DO DO DO O O O O O QO O WON DO ib UN FH OO CO JO CO MOAN dm Ui ib WON H o 0 TI QDNXN oF WN EF KO N N N N
17. of a fax the modem uses the AT F commands These commands are not discussed in the manual since they work together with specific software only 3 2 Command mode and data mode The modem knows two modes 1 Command mode In this mode the modem executes commands that are typed in through the terminal The modem is in the command mode when it is not on line or in case of a data connection when it was switched to the command mode through the escape sequence 2 Data mode The modem is transparent which means that information being exchanged through Se Allied Data Technologies TRON DF56 0 UK both modems remains unchanged With a data connection the modem is in the data mode most of the time If the modem has to execute a command this can only be done from the command mode During a connection the modem can be switched to the command mode through the escape sequence Escape sequence wait 1 second type after 1 second OK The modem is now in the command mode Use the command ATO to make the modem return to the data mode 3 3 Command line format A command line begins with the letters AT from the English word ATtention The letters AT should both be in either upper case or lower case The command line ends with lt ENTER gt One or more commands can be given on each command line A command line may not contain more than 54 characters You cannot type more than 54 characters on one line NOTE The modem rem
18. this part of the manual Each register has a specific value The factory setting is shown in the first line The registers marked are stored in non volatile memory by the command AT amp W SO 000 0 99 Auto answer Setting that determines the number of rings before the modem goes on line Auto answer is disabled as the default setting Auto answer can be switched on for example with SO 1 N B If you want to enable the modem select option you should give SO the value 102 S1 000 0 255 Ring counter Counts the number of incoming ring signals and places them in this register 0 255 signals can be recorded The register is reset when the modem answers the line Allied Data Technologies UK TRON DF56 0 S2 S3 S4 S5 S6 S7 S8 S9 043 0 255 Escape code character ASCII value of the character used as the escape code The default value is 043 corresponding to the character If the content of the register is greater than 127 the escape code is disabled 013 0 127 Carriage return character Specifies the ASCII character to be used as the carriage return character Carriage return indicates the end of a command line 010 0 127 Line feed character Specifies the ASCII character to be used as the line feed character The line feed comes at the end of a command line after the carriage return 008 0 255 Backspace character Specifies the ASCII character to be used as the backsp
19. 000 9600 7200 or 4800 33600 31200 28800 26400 24000 21600 19200 16800 14400 12000 9600 7200 4800 2400 56000 54667 53333 52000 50667 49333 48000 46667 45333 44000 42667 41333 40000 38667 37333 36000 34667 33333 32000 30667 29333 28000 56000 54000 52000 50000 48000 46000 44000 42000 40000 38000 36000 34000 32000 300 1200 Default setting The modem may also automatically switch to another modulation auto mode Allied Data Technologies TRON DF56 0 UK lt automode gt The setting of lt automode gt automatically switches modulation negotiations according to V8 or V32bis annex A on or off The possible settings are Selected option 0 Automode disabled 1 Automode enabled using V 8 or Default V 32 Annex A The default value is 1 which enables automode Note however there are modulations for which there is no automatic negotiation e g Bell 212 lt mod gt 69 lt min_speed gt Specifies the lowest speed at which the modem may establish a connection The default value is 300 bps lt max_speed gt Specifies the highest speed at which the modem may establish a connection The default value is 56000 bps lt x law gt indicates whether mlaw or Alaw should be used during K56flex connections Alaw is used in European countries It is not recommended that you change this parameter lt rb_signal gt this parameter should not be changed lt
20. 23 connection 14400 bps V32bis connection 33600 bps V34 connection 48000 bps V34 connection MNP5 connection V42bis connection Connection without compression FAX connection Data connection It is possible that a connection has been established at another communication speed than you selected In that case you have to set the communication program at the new speed Some programs do this automatically If the speed converter of the modem is on default the communication program does not have to be set again since the speed to the computer remains the same The Carrier LED CD is on to indicate that there is a data connection at which green is a safe error free connection b Ifitis not possible to establish a connection one of the following messages appears on the screen ERROR NO DIALTONE BUSY NO CARRIER NO ANSWER You made a typing error The modem does not recognise a dial tone Therefore it is not possible to call Check whether the modem is connected with the telephone network The telephone number that you dialled is busy The called modem does not have the speed that was selected Another explanation is that there is no modem available at the dialled number There is no response 7 Terminate the connection There are three possibilities to do so a Askthe called system base to disconnect Allied Data Technologies TRON DF56 0 b Use the hang up command of the communica
21. ATE command causes the characters that are entered to be displayed on the terminal as well 0 Display off 1 Display on default AT E Auto retrain on off 0 Auto retrain off default 1 Auto retrain on 2 Fall back Fall forward on 3 As E1 but is interrupted more quickly with poor connections AT amp F Factory default settings This command restores the modem s factory settings These are given for each AT command and in the list of the S registers The term default indicates the factory settings 0 Restore factory profile 0 1 Restore factory profile 1 AT amp G Guard tone on off This command switches use of the guard tone on or off 0 Guard tone off 1 Idem Allied Data Technologies UK TRON DF56 0 AT G ATH AT H ATI 2 1800 Hz guard tone on default Modem modem flow control Xon Xoff Depending on the settings the flow control between the modems is on or off This is only applicable for non error corrected connections since a connection with error correction has its own flow control See also AT amp K 0 Modem modem flow control off default 1 Modem modem flow control on On hook off hook 0 The modem goes off line and terminates any test AT amp T 1 If the modem is off line it is put on line in command mode The modem goes off line again after the time specified in S30 2 Select line 2 The modem starts to communicate through line 2 Line 1 is selected again in case of bre
22. Allied Da Med Vata A gt Disclaimer This manual by ALLIED DATA TECHNOLOGIES B V hereinafter referred to as ALLIED DATA TECHNOLOGIES is a reflection of the current state of the products described in it It has been our aim to provide a description which would be sufficiently complete and clear to see to it that our products would be as easy as possible to use However this manual may contain technical inaccuracies and typing errors As a result of rapid developments we are also obliged to reserve the right to implement technical modifications and developments without prior notice For this reason ALLIED DATA TECHNOLOGIES does not warrant the contents of the manual and its permanent applicability Neither is ALLIED DATA TECHNOLOGIES liable for possible loss of information or any improper use of information resulting from the consultation of this manual In particular ALLIED DATA TECHNOLOGIES is not liable for any direct or indirect damage including loss of profits and comparable losses resulting from the use or improper use of this manual even if ALLIED DATA TECHNOLOGIES ora representative of ALLIED DATA TECHNOLOGIES has been informed that such damage could arise Of course this does not detract from out legal liability for intentionally inflicted damage or damage on the basis of gross negligence In relation to the information mentioned in this manual ALLIED DATA TECHNOLOGIES does not warrant that there are no industrial rights o
23. Disable response Quiet 37 S Read write S registers 38 T Select tone dialling DTMF 39 V Terse verbose response 39 W Extended response 42 X Dial and busy tone recognition responses 42 Y Long space disconnect 43 Z Reset and configure modem 44 Escape code sequence 44 ORSR Remote configuration 44 amp C Carrier Detect DCD status 22 amp D Data Terminal Ready DTR status 25 E Allied Data Technologies TRON DF56 0 UK 8F Factory default settings 27 8G Select guard tone 27 8J Select calling back through line 1 or 2 optional 29 amp K Flow control 29 amp M Synchrone mode 32 amp Q Synchronous asynchronous mode 37 amp R RTS CTS control 38 amp S Data Set Ready DSR control 38 amp T Test and diagnosis 39 amp V Show configuration 40 amp V1 Show data from most recent connection 41 amp W Store current configuration 42 amp X Synchronous clock 43 amp Y Modem configuration after switching on 43 amp Z Store a telephone number in memory 44 C Select data compression mode 22 E Enable disable auto retrain 27 F Split baud rate direction selection 27 K Programme softkey 29 Q Line signal quality 37 A Auto dailback on of 21 C Remote configuration password 23 H Negotiation speed MNP10 28 SL List auto dialback numbers 32 P Store auto dialback numbers 37 X Exit remote configuration 43 A Select maximum MNP block size 21 B Send a break signal to remote 22 D Dumb mode 26 G Modem modem flow control Xon Xoff 28
24. N N N DOP WBN H O ts pa N N HEX 56 bil 58 59 5A 5B 5C DE 5F 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6E 6F 70 71 72 13 74 75 76 77 78 79 TA 7B TC TE TE TRON DF56 0 APPENDIX E BIBLIOGRAPHY Many publications have appeared on the subject of modems and other aspects of data communications They include books articles in computer magazines as well as specialist data communications magazines A good book shop will be able to provide more information UK TRON DF56 0 Index A Answer 18 50 Answers 21 ASCII 44 48 71 72 B BBS 69 Bell 66 71 Break 30 57 Break signal 22 BUSY 25 C Carriage return 48 Carrier 22 48 49 CCITT 18 21 54 66 Character 55 CONNECT 42 43 58 Comnector 70 CTS 29 30 38 51 53 56 66 D DSR 38 51 DTR 25 26 51 53 E Echo 18 27 49 ERROR 22 36 38 Escape 18 44 48 71 External model 36 F FAX 22 Flow control 29 56 Full interspeeder 66 l Identification 18 28 Internal model 36 Interspeeder 36 L LAPM 31 36 55 58 66 LED 22 66 Line feed 48 Long space disconnect 18 43 Loudspeaker 18 32 52 Loudspeaker volume 31 52 M MNP 21 28 31 55 56 57 Modulation 67 N NO ANSWER 25 NO CARRIER 24 NO DIALTONE 25 O Originate 18 36 50 P Pulse dialling 18 36 49 Q Quiet 18 37 R RDL 52 Register 46 49 50 51 52 53 54 56 Allied Data Technologies TRON DF56 0
25. RDL V54 L2 7 Request for a RDL V54 L2 with self test Terse verbose response This command sets the response to the terminal to verbose or terse 0 Terse numerical response 1 Long verbose response default Allied Data Technologies TRON DF56 0 Response table SHORT LONG n 0 1 2 3 4 SHORT LONG n 0 1 2 3 4 0 OK BU om NG NG 59 CONNECT 16800 LLE 1 CONNECT KI mil wa E 61 CONNECT 21600 do RS E OK 2 RING BO Ko Kr mx 62 CONNECT 24000 L fe e EA 3 NO CARRIER o Me Sha ke ei 63 CONNECT 26400 do eni di iS 4 ERROR dEi a Mika SN 64 CONNECT 28800 de de cav Se E 5 CONNECT 1200 Ts Sgr ces Lo ae 66 COMPRESSION CLASS 5 x x 6 NO DIALTONE 3 do RI 67 COMPRESSION V42bis x 7 BUSY di 37 37 Bi E 69 COMPRESSION NONE fey y a E SB 8 NO ANSWER Ko Bag Mai 76 PROTOCOL NONE Hi ati sa in BG 9 CONNECT 600 E LK SK 17 PROTOCOL LAP E EEN 10 CONNECT 2400 ELA RE 78 CARRIER 31200 A mr RIA 11 CONNECT 4800 o se A E 79 CARRIER 33600 A BATE SR 12 CONNECT 9600 E BO E 80 PROTOCOL ALT Pia paa IE NAN 13 CONNECT 7200 Ko E biko E 81 PROTOCOL ALT CELLULAR x 14 CONNECT 12000 ES e E 84 CONNECT 33600 LE TE 15 CONNECT 14400 Bod cao zio Lf 9 1 CONNECT 31200 L Bo ER 16 CONNECT 19200 RS E 150 CARRIER 32000 Ky A 17 CONNECT 38400 ee A E 151 CARRIER 34000 E DA BG CA 18 CONNECT 57600 Se ce LE 152 CARRIER 36000 BE CSA DE ES E 19 CONNECT 115200 Pa A o VE 153 CARRIER 38000 Rie HY Sy E
26. TR time The modem ignores a disabled DTR CT108 for a time shorter than the value of this register The time is expressed in seconds in synchronous mode and 1 100 seconds in other modes 001 0 255 RTS CTS control Delay time between RTS and CTS in synchronous mode This time is a value expressed in 1 100 seconds S27 009 Bitmap register Bit0 1 0 3 0 0 0 AT amp MO or AT amp Q0 default Bit 3 0 1 3 1 0 AT amp M1 or AT amp Q1 2 0 AT amp M2 or AT amp Q2 3 0 AT amp M3 or AT amp Q3 0 1 At amp Q4 1 1 AT amp Q5 TRON DF56 0 2 1 AT amp Q6 Bit 2 0 1 0 Reserved Bit 4 5 0 2 0 Clock selection 0 Internal clock AT8X0 1 External clock AT amp X1 2 Slave clock AT amp X2 Bit 6 0 1 0 CCITT BELL selection 0 CCITT mode ATBO 1 BELL mode ATB1 Bit 7 0 0 S29 011 10 12 Flash Dial Modifier time Register recall time in 1 10 msec This setting is used if you include in the dial string see ATD S30 000 0 255 Idle time S30 contains the time during which the modem remains on line without any activity A number gt 0 specifies how many minutes elapse before the line is disconnected S30 0 means no time limit S31 194 Bitmap register pt ET TN Deseription Bit 0 Reserved Bit 1 0 1 1 Automatic line speed detection 0 Off ATNO 1 On ATN1 Bit2 3 0 2 0 Error correction messages 0 DTE speed only ATWO 1 DTE and DCE speed ATW1 3 DCE speed only ATW2 TRON DF56 0 UK Bit4 5 0 Calle
27. ace character A value greater than 32 disables backspace recognition 006 2 255 Maximum wait time for dial tone or blind dialling The value in this register determines the wait time for the dial tone after the modem goes on line If no dial tone is detected the modem checks whether blind dialling is set The same wait time is used if the character W is included in the telephone number 060 0 60 Carrier timeout This register determines how long the modem will wait for a carrier after dialling This time is a value in seconds 002 0 255 Length of the pause character The pause character can be used to insert a delay when dialling This time is a value in seconds 006 1 255 Carrier detect time A carrier must be detected during the time entered in this register This time is a value expressed in 1 10 seconds S9 must always be less than S10 Allied Data Technologies TRON DF56 0 S10 014 1 255 Carrier lost time A carrier must be lost for the time specified in this register before the modem disconnects This time is a value expressed in 1 10 seconds S10 must always be greater than S9 S11 090 65 230 DTMF tone duration 12 050 0 255 Timeout escape code Specifies the minimum wait time before and after the escape sequence This time is a value expressed in 1 50 seconds Default is 1 second S13 010 1 255 Timer Auto Power Unit APU Bir value Detauk Description Bit0 6 1 255 10 Switch off delay tim
28. acter 48 S5 008 0 255 Backspace character 48 S6 7 004 2 255 Maximum wait time for dial tone or blind 48 dialling S7 i 060 0 60 Time for carrier 48 S8 a 002 0 255 Length of the pause character 48 S9 006 1 255 Carrier detect time 48 S10 014 1 255 Carrier lost time 49 S11 170 150 255 DTMF tone duration 49 S12 050 0 255 Timeout escape code 49 S13 010 1 255 Timer Auto Power Unit APU 49 S14 138 Bitmap register 49 S15 Reserved 50 S16 000 Bitmap register test options 50 S17 Reserved 50 18 000 0 255 Test Timer 51 19 Reserved 51 20 Reserved 51 S21 055 Bitmap register 51 S22 117 Bitmap register 52 S23 183 Bitmap register 52 24 Reserved 53 25 005 0 255 DTR inactive time 53 26 001 0 255 RTS to CTS active time 53 S27 009 Bitmap register 53 29 011 10 12 Flash Dial Modifier time 54 Seas Allied Data Technologies TRON DF56 0 UK REG amp W DEFAULT RANGE DESCRIPTION page 2580000 0 255 Inactivity Timer 54 s31 194 Bitmap register 54 S32 017 0 255 Xon character 55 S33 019 0 255 Xoff character 55 S36 007 0 7 LAPM error detection line speed limit 55 S37 000 0 12 Modulation mode 55 S38 020 0 255 Off line delay error corrected modes 56 only S39 003 0 3 6 Flow control 56 s40 105 Bitmap register 56 S41 131 Bitmap register 57 S46 138 136 138 Data compression 58 S48 a 007 0 7 128 V42 negotiation 58 S95 033 Extended response 58 4 3 Description of the S registers The S registers are described in
29. aking off the connection For this a Dual Line interface extension is required MNP10 negotiation speed This command is used to determine the line speed during negotiations between two MNP Class 10 modems Communication then takes place at a higher speed 0 Negotiation at the highest supported speed default 1 Negotiation at 1200 bps Identification This command causes the modem to send the required information to the screen depending on the specified parameter 0 Product code 1 2 n a 3 Type of modem and version number of the software Allied Data Technologies TRON DF56 0 UK AT amp J ATK AT K AT amp K Select auto dialback through line 1 or 2 This command selects whether the dialback is done through line 1 or 2 This command will only function correctly with an installed Dual line interface 0 Calling in and dialback through line 1 1 Calling in through line 1 dialback through line 2 default Voice Data switch This command selects whether the connection can be terminated using the softkey In combination with the AT K command the softkey can be programmed as a voice data switch 0 Softkey has no function in the data mode 1 Connection is terminated when the softkey is pressed in the data mode default Softkey Programmes the softkey The commands following AT K are allocated to the softkey These are executed when the softkey is pressed during command mode A maximum of 31 characte
30. character in ASCII Q is sent to the computer and the computer resumes sending more data NOTE The flow control of the communication software has to be active Some transmission protocols such as Xmodem and Zmodem do not combine properly with the Xon Xoff flow control Therefore RTS CTS is the most commonly used type of flowcontrol 5 3 Error correction and data compression When two modems communicate invalid characters can be received as a result of disturbance on the telephone line In order to prevent the reception of wrong information protocols have been developed which check and if necessary correct the information MNP Microcom Networking Protocol and V42 LAPM are protocols that recognise and correct an error To compensate the speed loss caused by this there is a possibility to compress the data to be sent MNP5 and V42bis have a compression technique with which an effective bit speed can be reached which is greater than with a normal connection This means that with for instance a V34 33 600 connection a speed higher than 33 600 bps can be attained MNP5 can compress by a factor 2 so the effective speed can reach a maximum of 67 200 bps V42bis can compress by a factor 4 at which a line speed of 134 400 bps can be reached Esc Allied Data Technologies TRON DF56 0 UK NOTE The speeds mentioned are theoretically reachable speeds The compression factor mainly depends on the content of the file which is sent There
31. e APU Bit 7 0 1 0 0 switch off on DTR 1 switch on on CD S14 138 Bitmap register CO E Description Bit 0 0 Reserved Bit 1 0 1 1 0 Echo off ATEO 1 Echo on ATE1 Bit 2 0 1 0 0 Response on ATQO 1 Response off ATQ1 Bit 3 0 1 1 0 Terse response ATVO 1 Verbose response ATV1 Bit 4 0 1 0 Reserved Bit 5 0 1 0 0 Tone dialling ATT 1 Pulse dialling ATP Bit 6 E 0 Reserved Uk TRON DF56 0 oi vate Detaut Deserto Bit 7 0 1 1 0 Answer 1 Originate S15 Reserved S16 000 Bitmap register test options CO value ET Desorption Bit 0 0 Local analog loopback 0 Off 1 On AT amp T1 Bit 1 0 1 0 Not used Bit 2 0 1 0 Local digital loopback 0 Off 1 On AT amp T3 Bit 3 0 1 0 Status remote digital loopback RDL 0 Modem not in RDL 1 RDL in operation Bit 4 0 1 0 Status RDL request 0 no RDL request 1 RDL request AT amp T6 Bit 5 0 1 0 RDL with self test 0 Off 1 On AT amp T7 Bit 6 0 1 0 Local analog loopback LAL with self test 0 Off 1 On AT amp T8 Bit 7 0 1 0 Reserved S17 Reserved S18 S19 S20 S21 TRON DF56 0 000 0 255 Test Timer S18 is used to determine how long a test is performed With a value of O the test will be performed continuously The test can be interrupted by the AT amp TO or ATH commands Reserved Reserved 055 Bitmap register pit Value E Description Bit 0 0 1 1Reserved Bit 1 0 1 1 0 ATKO 1 ATK1 Bit 2 0 1 1 CTS CT106 control
32. e data base that you want to contact a serial cable a wall socket 2 3 Connection of the TRON DF56 0 To connect the modem Connect the serial ports of the modem and the computer with each other Take the cable with the feed through plug and click the telejack on the other end of the cable into the connector of the modem figure 2 point e Put the feed through plug into the telephone socket and the telephone plug into the feed through plug If the extra connector is available figure 2 point d connect the telephone here In this case the modem can be connected with the telephone line through a normal plug Put the mains plug of the modem into the wall socket Switch the modem on by turning the switch at the back into the 1 position Now the green power LED is on After being switched on the modem will execute an extended self test This takes a few seconds Allied Data Technologies TRON DF56 0 UK 2 4 Establishment of a data connection In this paragraph we will go over the actions which are necessary to establish a data connection Here the communication software is discussed roughly The fact is each package has its own command structure 1 Start the communication program 2 Assure that the software controls the serial port to which the modem is connected 3 Select the communication speed baudrate number of data bits and the parity For example 57600 bps 8 bits no parity 4 Assure that the pro
33. elephone lines Applications a Auto dialback Call in through line 1 and call back through line 2 In some situations this is necessary to guarantee that the first connection is broken off Allied Data Technologies TRON DF56 0 UK UK TRON DF56 0 APPENDIX A Technical data General Speed CCITT V21 V22 A B V22bis V23 V32 V32bis V34 V90 K56Flex Bell 212A Bell 103 Fax CCITT V17 V29 V27ter and V21 channel 2 Error correction V42 LAPM MNP2 4 and MNP10 Data V42bis and MNP5 compression Command sets Extended AT command set including AT F fax commands Class 1 and Class 2 fax commands Data formats Data 7 or 8 bits Parity odd even space mark or none Stop bits 1 or 2 Asynchronous and synchronous mode Automatic baud detection from 300 to 230 400 bps CLI detection according to T11 12 Full speed convertor with Xon Xoff and or CTS RTS flow control Transparent direct mode 11 bits Access protection by automatic dialback or access code control Listening on built in loudspeaker volume adjustable Full diagnosis V54 with local and remote test loops Non volatile memory for 4 telephone numbers Two user settings Auto dialback with 100 passwords and corresponding telephone numbers Serial port CCITT RS232C V24 300 230 400 bps Internal power supply with connection to mains through Euro connector LEDs for status indication Programmable Softkey ess Allied Data Technologies TRON DF56 0 UK
34. embers the last command line To repeat it type A without lt ENTER gt For clarity commands must be separated from each other by spaces The spaces count towards the total length of the command line A command is sometimes followed by a parameter number If the parameter is 0 it may be omitted For example ATEO is the same as ATE A command line is not executed if CNTRL X 18H is received by the modem From the letters AT at the beginning of the command line the modem identifies the baud rate and parity of the terminal and configures itself accordingly The rates which are recognised automatically are 300 1200 2400 4800 9600 19 200 38 400 57 600 115 200 and 320 400 bps The modem can recognise data formats with 7 bit or 8 bit characters with even odd or no parity bit and with one stopbit Allied Data Technologies UK TRON DF56 0 3 4 Overview of the AT commands The modem responds to the following commands In section 3 5 Explanation of the AT commands from page 20 the AT commands are described with the associated parameters AI Repeat last command 20 x Write to the selected S register 20 List contents of the selected S register 20 A Answer 21 B CCITT or RING 21 D Dial 24 E Echo 27 H On hook off hook 28 I Identification 28 L Loudspeaker volume 31 K Voice Data switch 31 M Loudspeaker Monitor control 32 N Automatic line speed detection 36 O On line data mode Originate 36 P Pulse dialling 36 Q
35. etting involved AT amp V Show connection data This command provides an overview of the present configuration The stored settings 0 and 1 the first four stored telephone numbers and the value of the softkey appear on the screen TRON DF56 0 UK AT amp V1 AT V Display data from last connection The AT amp V1 command show data about the previous connection This is a typical output of the AT amp V1 command after a V 90 connection TERMINATION REASON LOCAL REQUEST LAST TX KATE sok eis rot a se Soe 31200 BPS HIGHEST TX Mates oy aa ari 31200 BPS LAST RX LAC Cis dana aras 46667 BPS HIGHEST RX FALSI sees os 46667 BPS PROTOCOL 2 3 IR BAN ee eee LAPM COMPRESSION i na Na seee V42Bis Line QUALITY a ace dee eek ee eee 038 Rx LEVEL collane 013 Highest Rx Staten aderire 67 Highest TX States ose secede 67 FOM SUN a ila intera feos ess 00C6 RBS Pattern te nio 00 Rate DEO Pie sive tacitly ce rara 00 Digital LoS Siri ss 2000 Local REEN COURT aks an 00 Remote Rtrn Count 00 V90 OK Number of signal lines for connection After establishing a connection the modem can show that the connection has been established on one or more lines 0 Message on several lines default 1 Message on one line The single line connect message format is CONNECT lt DTEspeed gt lt MOD gt lt PROT gt lt COMP gt lt Linespeed gt where DTEspeed DTE Modemspeed Range 300 230400 bps
36. f ownership trademarks patents etc This also applies to commonly used brand names company names and product names but these are subject to the relevant trade mark patent and registered design laws The information is not to be copied translated reproduced or transferred or stored on any electronic medium or other machine neither wholly nor partly without prior permission in writing from ALLIED DATA TECHNOLOGIES The sale and use of software is subject to the ALLIED DATA TECHNOLOGIES General Terms of Delivery and Payment as well as its License Terms Should any term regarding the disclaimer be or become void for legal reasons this will not affect the other terms la Allied Data Technologies bv Allied Data P O Box 788 TECHNOLOGIES NL 3200 AS SPIJKENISSE O The netherlands O May 1999 Web Jet TelTron QuaTron TRON DF Tele Talk Triterm Trion Duon and VidiTron are registered trademarks of ALLIED DATA TECHNOLOGIES B V IBM is a registered trademark of International Business Machines Corp IBM MNP is a registered trademark of Microcom Inc TRON DF56 0 UK Allied Data TECHNOLOGIES TRON DF56 0 User manual Allied Data Technologies UK TRON DF56 0 Contents INTRODUCTION 5 ma ph bA KARA AHAB ARAL GEN saws 4 1 DATACOMMUNICATION 5 1 1 Data bits parity bits and speed 0000 eee 5 1 2 ASCII and the meaning of data 6 1 3 Function of the modem 4 a a
37. fore a text file can be easily compressed where data compression is not very useful on already compressed ZIP ARJ or ARC files Error correction and data compression will not work with FSK modes such as V21 and V23 To effectively use data compression it is obvious that the serial port speed has to be high for instance 115 200 bps 5 4 User access control and automatic dialback The TRON DF56 0 modem is equipped with a user access control and an auto dialback system 1 The user calling in has to enter a password before the connection is established definitely 2 The user calling in has to type a password After this the modems are disconnected and the user will be called back To have auto dialback working the following actions must be taken 1 Programming Entries 2 Activating the auto dialback 3 Activating the Auto answer Programming Entries An entry consists of a number password and possibly a telephone number There are 100 entries their numbers range from 0 to 99 The password consists of at least 5 and at most 8 characters Lower case characters are automatically converted to capitals A telephone number is only necessary if the auto dialback facility is needed Check the ATD command for allowed telephone number characters The maximum length for the telephone number is 16 digits Use the AT P command to programme your entries The colon sign has to be used to separate the entry number the password and t
38. g established immediately clears the attempted connection AT A Maximum MNP block size The MNP error correction mode is activated and the modem operates with the set maximum block size as shown in the following table 0 64 characters 1 128 characters default 2 192 characters 3 256 characters AT A Auto dailback on of This command is used to switch Auto dailback on or of 0 Auto dailback is off default 1 Auto dailback is on See also the special chapter on Auto dailback ATB CCITT RING modulation With this command the modem uses CCITT or RING modulation for connections with a speed of 300 or 1200 bps depending on the parameter entered The default setting CCITT is used for all other speeds 0 CCITT modulation default 1 RING modulation Allied Data Technologies UK TRON DF56 0 AT B AT C AT amp C AT amp C Break signal to other modem With this command during a connection without error correction the modem sends a break signal to the other modem the length of which depends on the specified parameters During a connection with error correction the break signal is sent by the active error correction protocol but without an indication of the length If there is no connection or FAX mode is active the ERROR message is issued 1 9 Length of the break signal in units of 100 ms default 3 This only applies to connections without error correction Data compression mode This com
39. given below Dots may be used to make things clear Brackets hyphens and spaces are igno red 0 9 Numbers 0 to 9 n The asterisk symbol only with tone dialling The hash symbol only with tone dialling A D The DTMF letters A to D P Select pulse dialling T Select tone dialling n Dial a number from the telephone list see AT amp Z Flash The modem is switched off line during the time set in register S29 Allied Data Technologies TRON DF56 0 UK AT amp D W lt space gt Wait for a dialling tone The modem waits for a dialling tone before the requested number is dialled If no dialling tone is detected within the time specified in register S6 the modem is switched off line and you will see the error message NO DIALTONE Wait for silence The modem waits for silence on the line for at least 5 seconds before the next dial command is carried out If the modem does not detect that 5 second silence during the time specified in register S7 dialling is interrupted and you will see the error message NO ANSWER If detection of the engaged tone is switched on you will get the message BUSY If the modem detects an answer tone before the waiting time has expired the connection will be established Dial pause the modem pauses during the time set in register S8 before the next number is dialled Repeat last number the modem repeats the last number dialled Return to command mode this command after entr
40. gram is in the terminal mode so that typed in characters can be sent to the modem The modem echoes the characters back to the screen 5 Type subsequently AT lt Enter gt On the screen appears AT OK NOTE If the characters appear on the screen twice the echo has to be switched off in the communication program ATEO With the TRON DF56 0 model the speed LEDs indicate the baudrate If none of the LEDs is on the DTR signal is not active This can be changed with the communication program If this is not possible the modem can simulate that DTR is active This is done with the AT amp DO command NOTE Use this method only if you know for sure that the software does not activate DTR Almost each program does so so that at first the cause must be found somewhere else for example at the cable 6 Dial a telephone number with the command ATD Type for example ATDOO 31 181698399 The On line LED is turned on and the modem dials the number Through the built in loudspeaker you can hear the connection building up a Ifa connection has been established one or two of the following messages appear on the screen CONNECT 300 bps V21 connection CONNECT 1200 1200 bps V22 connection Allied Data Technologies UK TRON DF56 0 CONNECT 2400 CONNECT 75TX 1200RX CONNECT 14400 CONNECT 33600 CONNECT 48000 COMPRESSION CLASS5 COMPRESSION V42bis COMPRESSION NONE FAX DATA 2400 bps V22bis connection 1200 75 bps V
41. h of the transmitted signal always has to be higher than the speed of the transmitted data Therefore for a 300 bps connection both tones have to be higher than 300 Hz for example 1000 and 1200 Hz The telephone line is capable to pass on tones correctly until about 3000 Hz This makes communication in both directions possible the fact is the receiver sends back other tones for example tones of 1700 and 1900 Hz As a result of this the receiver is also sender in the other direction This is called a full duplex connection It may be clear that for speeds higher then 2400 bps it is not possible any more to generate a 0 and a 1 at a far enough distance from each other twice within the 3000 Hz of the telephone line Also at 1200 bps this is already a problem In this case there are three possibilities 1 communication only in one direction half duplex at certain moments a switch can be made so that information can be sent back too 2 communication backwards the other way around at a lower speed the so called backchannel The latter is used a lot if much more information has to be sent in one direction than in the other direction 3 modulation according to a technique at which several bits are sent at the same time A half duplex connection with backchannel works as follows If the one modem sends a 1200 bps signal with tones of 1300 and 2100 Hz the other modem can send back a 75 bps signal with tones of 390 and 450 Hz S
42. hapter describes the TRON DF desk model the installation and putting the modem into use Chapter three explains the modem commands In chapter four the S registers are discussed Finally chapter five gives an enumeration of the specific possibilities of the TRON DF modems In the appendices background information is provided about a number of aspects such as the technical specifications and the ASCII table Naturally the keyword list is an essential element of the manual The equipment has been approved according to resolution 98 482 EC for European single terminal connection to the public telephone network PSTN Because of minor differences between the PSTNs in different countries this approval does not it itself guarantee a correct link with every PSTN connection point ess Allied Data Technologies TRON DF56 0 UK If you have any problems you should first contact your supplier NOTE The manufacturer should ensure that the retailer and user of the equipment are aware of the above We do wish you lots of good connection with your TRON DF56 0 1 DATACOMMUNICATION Computers can exchange communicate data information through a disk floppy disk through the connection of two serial ports or through a network With the use of a modem information is exchanged through the serial or RS232 port 1 1 Data bits parity bits and speed The RS232 standard describes how serial information is processed passed on In the co
43. he telephone number Allied Data Technologies UK TRON DF56 0 For instance AT P67 universe 0W07530 145643 Entry 67 contains password UNIVERSE and telephone number 0W07530 145643 The AT amp W command is not neccesary to store entries in memory Be sure to check your entries with the AT Ln command Activating Auto dialback Auto dialback is activated using the AT A command NOTE Note that bit 0 always remains 1 Switch on AT A1 Switch off AT AO This setting can be stored in permanent memory using AT amp W so that auto dialback is active as soon as the modem is switched on Activating Auto answer Activating Auto answer The ATS0 1 command puts the modem in Auto answer mode The modem goes on line in answer mode when there is an incoming call This setting can be stored in permanent memory with AT amp W so that auto answer is active as soon as the modem is switched on After the above mentioned settings your modem is completely ready for use of the SECURITY CALLBACK As soon as the modems establish a connection the remote modem will ask for a pass word The carrier signal is not yet passed on through the serial port because the connection is not yet definite If entering the password takes longer than 20 seconds the modems are disconnected A typing error can be corrected with the backspace key Three attempts can be made to enter the correct password As soon as a correct password has been entered depending on the entry
44. his option to the relevant telephone company The number is displayed between the first and second RING see example The command is as follows AT CID n 0 Switch Caller Line Identification off default 1 Switch Caller Line Identification on with standard format 2 Switch Caller Line Identification on without standard format Example 1 AT CID 1 select with standard format OK RING NMBR 0724749361 incoming call number calling is 072 4749361 RING Allied Data Technologies UK TRON DF56 0 ATD Example 2 This example shows the non standard format of CLI The string between the first and second RING is displayed in ASCII hexadecimal code Opening and closing characters are added The opening character is a D hex 44 the closing character is a C hex 43 AT CID 2 select non standard format OK RING 443035333934363238303743 incoming call number calling is 053 9462807 Dialling This puts the modem on line and dials the number following the ATD command If you do not specify a telephone number the modem will be put on line and will try to establish a connection in originate mode The modem waits for the time specified in register S7 default 60 seconds for a carrier to establish the connection If the connection has not been fully established within that time the modem goes off line hangs up and you will see the error message NO CARRIER The approved telephone number parameters are
45. ing amp Q2 A amp 3 When the DTR signal is disabled the modem is switched off line Auto answer is not possible 2 When the DTR signal is disabled the modem is switched off line and auto answer is not possible This is independent of the amp Q setting default 3 Ifthe DTR signal is disabled the default settings of amp Q are affected as follows amp Q0 amp Q1 amp Q4 When the DTR signal is disabled a soft reset of amp Q5 amp Q6 the modem is performed as would be done with the ATZ command The AT amp Y setting determines which profile is loaded amp Q2 amp Q3 When the DTR signal is disabled the modem is switched off line Auto answer is not possible The commands AT amp Q5 and AT amp Q6 have the same effect as AT amp Q0 AT D Dumb mode Use this command to enable dumb mode When dumb mode is enabled the modem does react to any characters from the serial port AT commands are not recognized and calls can not be aborted 0 Disable dumb mode default 1 Enable dumb mode Ser Allied Data Technologies TRON DF56 0 UK If you want to make the dumb mode a default setting you should use this command AT D1 amp W lt CR gt When you ve issued this command there is only on way to disable dumb mode Switch off your modem Keep the softkey depressed while you switch on the modem again Release the softkey after a view seconds the default factory settings are now active ATE Local echo on off The
46. mand selects the MNP5 and or V42bis mode for data compression This mode can only be used with a connection with error correction 0 data compression off 1 MNP5 data compression on 2 V42bis data compression on 3 V42bis and MNP5 on automatic selection default Carrier Detect DCD status Controls the function of the DCD signal 0 DCD is always on not visible on LED 1 DCD follows the status of the carrier on the line default DCD status carrier detect This command is used to set the operation of DCD 0 DCD is always on not visible on LED indicator 1 DCD monitors the carrier status on the line default Allied Data Technologies AT C AT CID TRON DF56 0 UK Remote configuration Password optional This command stores a password in memory By entering the AT C command the modem shows the text ENTER PASSWORD after which a new password can be entered The password given by the remote modem must correspond with the password stored in the local modem The password must be between 6 and 12 characters of length and it may only include alphanumerical characters The factory setting for the password is SECRET See also the AT X command and section 5 5 Remote configuration optional Dutch Calling Line Identification The DF56 0 supports Dutch Calling Line Identification according to T11 12 This option indicates who is calling before answering An extra subscription will have to be paid for t
47. mputer bits are processed simultaneously parallel Through the serial port these bits are passed on one by one A couple of extra bits are sent along to assure that the receiving side can interpret them correctly These bits are a starting bit the so called parity bit for error detection and one or two stop bits Together this forms a frame or character The two frames used most frequently for standard asynchronous communication are built up as follows 1 start bit 7 data bits 1 parity bit 1 stop bit or 1 start bit 8 data bits 1 stop bit Beside the frame character the speed baudrate has to be set as well The speed is expressed in Bits per Second bps or baud Although there is a difference these concepts are often used alternately However the indication bps is always correct Therefore at V21 300 bps is the same as 300 baud However at V22bis a 2400 bps Allied Data Technologies UK TRON DF56 0 connection is 600 baud This is the case since per modulation per baud 4 bits are transferred simultaneously Possible speeds are 75 300 600 1200 2400 4800 7200 9600 12000 14400 16800 21600 24000 26400 28800 31200 and from 33600 up to 56000 bps When the data bits parity bits and speed have been set on both sides sender and receiver a connection can be established Information can then be exchanged 1 2 ASCII and the meaning of data For the interpretation of received data with mos
48. n at an arbitrary speed without having to adjust the DTE speed in the software 5 2 Automatic flow control When the modem uses a speed convertor there is a difference in speed between the serial port and the telephone line This means that the modem receives data faster than it can send through the telephone line The information is therefore temporarily stored in a buffer There are two ways for a modem to indicate that the computer has to stop sending information for a while because the buffer is in danger of overflowing 1 By making CTS Clear To Send on the RS232C port inactive 2 By means of the Xon Xoff protocol The AT amp K command can be used to select the flowcontrol options Allied Data Technologies UK TRON DF56 0 This is how CTS RTS flowcontrol works As soon as the buffer is almost full CTS is made inactive When the computer recognizes this CTS flow control it reacts to it by no longer sending data to the modem When the buffer is empty CTS is made active and the computer can start sending new bytes to the modem The computer can also signal the modem to stop sending data to do this it uses the RTS signal This is how Xon Xoff flowcontrol functions As soon as the modem buffer reaches a certain limit the modem sends the Xoff character in ASCII 4S through the serial port to the computer The computer reacts to this by sending no more bytes to the modem When the modem buffer is almost empty the Xon
49. n or off and set the lowest and highest possible line speed The command has the following syntax MS lt mod gt lt automode gt lt min_speed gt lt max_speed gt lt x law gt lt rb_signal gt lt bc_speed gt lt CR gt With this command a value for lt mod gt must be specified the other parameters are optional If a parameter is not specified the current value is used Displaying the selected options The command AT MS causes the current modem settings to be displayed for example 12 1 300 56000 1 0 33600 The command AT MS causes a list of possible values for the parameters to be displayed The modem responds as follows MS list of possible lt mod gt values list of possible lt automode gt values list of possible lt min_speed gt values list of possible lt max_speed gt values selection lt x law gt selection lt rb_signal gt maximum bc_speed gt Example 0 1 2 3 9 10 11 12 64 69 74 0 1 300 33600 300 56000 0 1 0 1 300 33600 Allied Data Technologies UK TRON DF56 0 Explanations of parameters lt mod gt A number indicating the preferred modulation automode on or the fixed modulation automode off for originate dialling or answer auto answer The possible settings are Q N QO 11 12 56 64 69 V21 V22 V22bis V23 V32 V32bis V34 V90 K56Flex Bell103 Bell212 300 1200 2400 or 1200 1200 9600 or 4800 14400 12
50. nn a e eR 7 1 4 Setting upa connection eee T 1 5 Transmission techniques aana aaa aae 8 1 6 Originale and answer 5 jo ritrarre 9 1 7 The modem is transparent 0 9 2 INSTALLATION OF THE MODEM 10 2 11 Description TRON DF56 0 Hoh a ts 10 2 2 What else do you need iero A cee Shea na 12 2 3 Connection of the TRON DF56 0 oooooooo 12 2 4 Establishment of a data connection 05 13 3 MODEM COMMANDS 000 0c eee eee 16 3 1 Using the AT commands sissi rione nta eee ee ws 16 3 2 Command mode and data mode 0 2000 16 3 3 Command line format 17 3 4 Overview of the AT commands 18 3 5 Explanation of the AT commands 20 4 S REGISTERD coser AA 45 4 1 Bit Mapped S registers ees 45 4 2 Overview of the S registers oo 46 4 3 Description of the S registers AA 47 EA Allied Data Technologies 5 SPECIAL APPLICATIONS 5 1 Full Speed adapta Bi weds e LA Re ees 5 2 Automatic flow control xica AAA 5 3 Error correction and data compression 5 4 User access control and automatic dialback 5 5 Remote configuration optional o oooooo 5 6 Answer in originate mode oo ococoo coco ooo 5 7 Modem Select optional o ooooooooo 5 8 Dual Line interface optional o
51. o APPENDIX A Technical data APPENDIX B Website and Bulletin Board APPENDIX C RS232C connector APPENDIX D ASCII table 0 2 APPENDIX E BIBLIOGRAPHY O siria De ARAN ina a Allied Data Technologies TRON DF56 0 UK UK TRON DF56 0 INTRODUCTION This manual describes how to use the DF56 0 modems Two modems connect two computers over a longer distance through a telephone line Data can be received from or sent to the other computer In this way contact can also be made with an external data base Information in this data base can be read and if necessary it can be received This manual does not describe all steps that are necessary for data communication The fact is a number of transactions depend on the communication program that is used The manual is mainly meant to give a survey of the application possibilities of the TRON DF modems Who should read this manual In this manual both the novice and the experienced user will find the information that he or she needs For openers chapter 1 is interesting for the first category In this chapter general information is given about data communication and the use of a modem The alphabetical description of the modem commands and the S registers chapter 3 and 4 can be used as a reference book by both kinds of users Manual conventions In the first chapter data communication in general is explained The second c
52. ou will also find recent drivers Both the Website and the BBS are available 24 hours a day Website http www allieddata nl Email info allieddata nl BBS 31 0181 698399 http www allieddata nl UK TRON DF56 0 APPENDIX C RS232C connector conr No Diecton Name Atbrevatea ieo 103 104 105 106 107 102 109 114 115 108 125 113 SAN O Oo FB O N A N O N 0 O Transmitted Data Received Data Request to send Clear to send Data set ready Signal Ground Data carrier detect 12V via 1kQ 12V via 1kQ Transmit lock Receive lock Data terminal ready Ring indicator Transmit lock RS232C connector Allied Data Technologies TxD RxD RTS CTS DSR GND CD DTR RI TxD RxD CD DTR AA ASCII table Meaning of the ASCII codes NUL SOH STX ETX EOT ACK BEL BS HT VT CR NAK Null or all zeros Start of Heading Start of Text End of Text End of Transmission Acknowledge Bell or Alarm Backspace Horizontal Tab Vertical Tab Carriage Retum Negative Acknowledge DC1 DC2 DC3 DC4 CAN Cancel EM End of Medium SUB Substitute FS File Separator Device Control 1 Device Control 2 Device Control 3 Device Control 4 GS Group Separator RS Record Separator US Unit Separator ETB Allied Data Technologies End Transmis Block SI SO SYN LF FF ENQ ESC DLE ESC SP DEL TRON DF56 0 UK APPENDIX D Shift In Shift Out Sync Line
53. program will have to be changed for example the number of data bits the parity bit or the baudrate This problem is not caused by the modem The modem functions as a hatch Allied Data Technologies TRON DF56 0 2 INSTALLATION OF THE MODEM In this chapter a description of the modem is given the installation procedure will be explained and finally it will be discussed how a connection can be built up step by step 2 1 Description TRON DF56 0 DF90 U At the front of the modem there are a number of lights e that indicate from the top down the speed of the 48 000 A connection as well as the DTR level TxD RxD 40 000 amp CARRIER On line AUTO ANSWER and POWER At 32 000 KRS 33 600 14 400 V32 bis 2 400 V 22 pis the bottom of the front the Softkey is located The speed LEDs have two functions 21 200 V 21 23 1 When the modem is connected to another modem TxD they indicate the speed at which communication RxD takes place on 2 They indicate the DTR Data Terminal Ready status This signal is active when one of the speed S online LEDs is on auto answer Softkey Figure 1 Front of the DF56 0 The transmission LEDs show the sent TxD and received RxD data on the serial port The third one the carrier LED CD indicates that there is a connection with a modem at which red indicates a non corrected connection When the CD LED is green a reliable connection is established Tha
54. r Line Identification AT 0 no CLI 1 formatted CLI AT CID 1 2 unformatted CLI AT CID 2 CID Bit 6 7 Reserved S32 017 0 255 Xon character S32 contains the character used for Xon flow control S33 019 0 255 Xoff character S33 contains the character used for Xoff flow control S36 007 0 7 LAPM error logging line speed restriction This register determines what happens after establishment of a V42 LAPM connection has failed S48 128 S48 128 CONEICC CN Bit 0 2 0 1 3 4 5 7 7 0 Disconnect 1 Direct mode connection 3 Normal mode connection 4 MNP connection only 5 MNP connection with fallback to direct mode connection 7 MNP connection with fallback to normal mode connection Bit 7 0 1 0 Reserved S37 000 0 12 Modulation mode 0 Auto mode 1 3 300bps V21 or Bell 103 4 Reserved 5 1200bps V22 or Bell 212A 6 2400bps V22bis UK TRON DF56 0 S38 020 7 1200 75bps V23 8 4800bps V32bis or V32 9 9600bps V32bis or V32 10 12000bps V32bis 11 14400bps V32bis 12 7200bps V32bis 0 255 Off line delay only in modes with error correction This setting determines how long it takes before the modem goes off line after a command to disconnect has been issued This time is used to ensure that the send buffer is empty before the modem disconnects This time is a value in seconds S39 003 0 3 6 Flow control Bit 0 2 0 No flow control AT amp KO 3 RTS CTS flow control AT amp K3 4 Xon Xoff flow control
55. rs the maximum length is 12 NOTE There is no way of asking for the password It is therefore important to remember it When you do forget your password the modem must be returned to Allied Data Technologies Call the TRON modem to be configurated remote and wait for the CONNECT message Type AAA The remote modem recognizes the sequence and asks for the password REMOTE PASSWORD Type the existing password a appears for each character Allied Data Technologies UK TRON DF56 0 You should be able to enter AT commands as soon as the remote modem verifies the password The AT commands you type will be executed by the remote modem End remote configuration with the AT X command the modem will exit remote configuration mode The connection will be transparent again The escape character default can be changed by altering S register 202 Not all commands can be executed using remote configuration The following commands are not permitted during remote configuration AT B AT P ATC AT amp T AT L ATZ ATO 5 6 Answer in originate mode For some applications it is necessary to answer in originate mode The modem takes up the line and behaves like it has dialled a number No answer tone will be heard To activate answer in originate add 128 to S register O Example The modem should answer the line in originate mode after two RING signals The value in SO should be 2 128 130 ATS0 130 lt CR gt OK 5 7
56. rs can be programmed including spaces For example AT K D Use as voice data switch Programme the softkey with the command D Dial By pressing the softkey the modem goes on line and tries to establish a connection in originate mode AT K Z1 Activate stored profile 1 AT K D067100 Dial 06 7100 See also ATK Flow control This command is used to set the flow control of the modem terminal 0 Flow control off 3 RTS CTS flow control on default 4 Xon Xoff flow control on 5 Transparent Xon Xoff flow control on Allied Data Technologies UK TRON DF56 0 AT K 6 Both Xon Xoff and RTS CTS flow control on Break control The modem responds to a break signal received from the terminal DTE a remote modem or the command AT B according to the specified parameters If a break signal is received from the terminal and the modem is operating in data mode the operation can be controlled with the following parameters 0 1 2 q 4 De On line command mode no break signal is sent The data buffers are cleared and a break signal is sent to the remote modem As 0 A break signal is sent immediately to the remote modem As 0 A break signal is sent to the remote modem with the data processing takes place in the order of sending default When the modem is in command mode during a connection you can use the AT B command to send break signals to the remote modem 0 4 2 3 4 5 The data b
57. s 100 entries the modem will only show 20 entries at a time the AT L command can be extended with a number to show all entries AT LO show entry 0 19 AT L1 show entry 20 39 AT L2 show entry 40 59 AT L3 show entry 60 79 AT L4 show entry 80 99 See the AT P command and paragraph 5 4 User access control and automatic dialback Loudspeaker on off 0 Loudspeaker off 1 Loudspeaker off during reception of the carrier default 2 Loudspeaker always on 3 Loudspeaker off during dialling and connection but on during establishment of the connection Synchronous mode This command determines the working of the CT108 in cooperation with the AT amp Q command 0 Direct asynchronous mode Attention The command AT amp MO NO selects the normal buffered mode while the command AT NO amp MO selects the direct mode 1 Selects synchronous connection mode and asynchronous off line command mode 2 The same as AT amp M1 with this difference that the modem starts to dial the number of memory 0 See AT amp Z when DTR becomes active Allied Data Technologies TRON DF56 0 UK AT MS 3 This is a synchronous mode at which DTR CT108 functions as voice data switch The call is initiated manually while DTR is not active When DTR becomes active an originate or answer connection is built up see S14 bit 7 Modulation mode This command is used to select the modulation mode of a V34 modem and may also be used to switch auto mode o
58. sult code on default 1 Result code off Line signal quality This command is used to monitor line quality Values between 000 and 016 correspond to a good line quality Values between 017 and 127 indicate poor quality The line is monitored constantly when the modem is on line When command AT E1 is activated and the signal value is higher than 016 a retrain is carried out Synchronous asynchronous mode This command is an extension of the command amp M which is used in combination with registers S36 and S48 to monitor the permitted connection modes Otot3 See AT amp MO to AT amp M3 4 As amp Q1 Allied Data Technologies UK TRON DF56 0 AT amp R ATS AT amp S 5 The modem tries to establish a connection with error correction With S36 the modem can be configured in such a way that an error causes it to be switched off line or to return to a normal asynchronous connection default 6 The modem operates in normal asynchronous mode See AT N RTS CTS control This command controls CTS in on line synchronous mode The operation of CTS is adjusted with hardware flow control 0 RTS to CTS is delayed according to the setting of register S26 1 In synchronous mode CTS is always on In asynchronous mode CTS is on unless flow control by hardware is set default See AT amp K Read write S registers n X S register n is set to value X n The value of S register n is read The parameter n can be omi
59. t is to say a connection at which possible errors are corrected This can be V42 LAPM V42bis or MNP 2 3 4 or 5 connection With a MNP5 or V42bis connection the data will be compressed also TRON DF56 0 UK The telephone line status is indicated by two LEDs On line OL and Auto Answer AA OL indicates that the modem has been connected with the telephone line Then the telephone is disconnected The AA LED has two different functions 1 off line the AA LED being continuously on means that the modem is in the auto answer mode The modem switches to on line as soon as a RING signal is detected The AA LED blinks to indicate this 2 on line a LED being on means that the modem is in the answer mode If the LED is off then the modem is in originate mode The power LED is on when the modem is switched on At the back of the modem there are connections from the top down for the telephone line the telephone the computer and the mains lead Beside that the type number and a sticker with the approval number and the ring equivalence number are attached Figure 2 Backside of the DF56 0 Allied Data Technologies UK TRON DF56 0 2 2 Whatelse do you need Apart from your TRON DF56 0 you need 1 BB 9 a telephone connection a computer or terminal with a serial port a communication program terminal and or fax program a telephone number and other data speed parity etc of th
60. t programs the ASCII table is used as a basis in which each character has a unique bit combination Sending text is relatively simple if both sides stick to this ASCII table Control characters are also included in the ASCII table These are characters that do not represent characters or punctuation but commands that may be followed by a certain action An example of such a command is the ASCII character with the number 12 Form Feed This command assures that the printer moves to the next page This way we also have characters which are used in data communication to indicate the beginning of a text block that we would like to send char 2 STX Start of text or its end char 3 ETX End of Text There are also characters that inform the sender whether a text block was received correctly or not This is done by character 6 ACK acknowledge and 21 NAK negative acknowledge Sending computer programs instead of text is a little more complicated After all in a program each combination of data bits can occur and therefore also a combination that represents a control character For each type of computer the meanings of these combinations can be different Most of the time sending programs between different kinds of computers therefore requires a conversion at the sender and the receiver Ifa conversion is used it is even possible to send programs as text Among others this is done with Prestel and Teletel zioni Allied Data Technologies
61. t way is when first a normal voice connection is established and subsequently is switched to a data connection communication through the modems by hand 2 A faster way is when the modem itself is capable to establish the connection dialling a number and the other modem can answer independently This is called auto dial and auto answer respectively Through a communication program the auto dial modem receives a command to dial a telephone number When the other modem is in the auto answer mode this one detects that the bell rings and it picks up the receiver after which a data connection is established Allied Data Technologies UK TRON DF56 0 1 5 Transmission techniques Modems for lower communication speeds until 1200 bps all work according to the same principle the so called FSK modulation Frequency Shift Keying FSK works according to the method of converting a digital signal existing of zeros and ones into tones The 0 has another pitch frequency than the 1 The receiving modem recognises the two pitches that it receives and for its part it forms again a digital signal out of the analog signal During the connection the sender always transmits a tone When at ease the signal of the serial port is 1 and the modem sends out the corresponding tone We call this tone the CARRIER The receiving modem knows that there is a connection with another modem by detecting this carrier With FSK modulation the pitc
62. tended response Bit 0 0 1 1 0 CONNECT and DTE speed 1 CONNECT and line speed Bit 1 0 1 0 0 CONNECT xxxx 1 CONNECT xxxx ARQ in mode with error correction Bit 2 0 1 0 0 CONNECT xxxx 1 CARRIER xxxx Bit 3 0 1 0 0 PROTOCOL message off 1 PROTOCOL message on Bit 4 0 Reserved Bit 5 0 1 1 0 COMPRESSION message off 1 COMPRESSION message on Bit 6 0 Reserved Bit 7 0 Reserved See also the response table for the ATV command TRON DF56 0 UK 5 SPECIAL APPLICATIONS This chapter explains what a Speed convertor is what it can do and how the flow control works in this Speed convertor and flow control are necessary with an MNP or V42 connection Error correction and data compression are roughly discussed The following subjects are also discussed Remote configuration and Auto dialback 5 1 Full Speed adaption The full speed adaption in the TRON DF56 0 modem causes the data speed to the RS232 connection of the modem to be independent of the data speed of the telephone line Communication with the computer now takes place on a fixed baudrate of 230 400 bps at the most irrespective of the speed of the telephone line The required communication speed is set with the AT MS command During a connection the established line speed can be read from the LED on the front panel of the modem The combination of full speed adaption and automatic baudrate selection in the auto answer mode makes is possible to establish a data connectio
63. tion program c Askthe modem to end the connection To do this use this command sequence Wait 1 second Type On the screen appears OK Type after that ATH lt Enter gt On the screen appears NO CARRIER Important The maximum speed between two DF56 0 modems is always 33600 bps using V34 Higher line speeds using V90 or K56flex can only be obtained by calling to a CSM Central Side Modem This is a device connected to a digital ISDN line Most Internet Service Providers have such equipment UK TRON DF56 0 3 MODEM COMMANDS This chapter describes the AT commands used for setting up and operating the TRON DF56 0 3 1 Using the AT commands Most modems and communications software uses the AT command set Some modem manufacturers add their own commands to the AT command set Consequently there is no longer one standard A distinction is made between the Standard AT and Extended AT command sets If you are using Windows 95 98 it is generally not important to know the AT commands A number of reasons can be given for the differences between modem commands By different inspection requirements certain commands or settings are not allowed in some countries There are also differences between American and European transmission standards Bell versus CCITT The TRON DF56 0 recognizes both the Standard and the Extended AT command set Apart from these a number of specific commands were added Moreover for the use
64. tted In this case SO is selected The parameter S can also be omitted For example ATS7 Select S register 7 AT 40 Set value 40 in the selected S register ATS38 Select S register 38 ATS 20 Set the value 20 in S register 0 If a number is entered for n for which no S register is present you will receive the message ERROR Input and output must always be in decimal numbers Some S registers are read only DSR control Data Set Ready This command is used to set the DSR control of the modem 0 DSR always on default 1 DSR is enabled when an answer tone is detected and disabled when the carrier is lost Allied Data Technologies TRON DF56 0 UK ATT AT amp T ATV Tone dialling DTMF With this command the modem dials a telephone number using tone dialling If a different method is stipulated for dialling a telephone number for example ATDT pulse dialling will always be used subsequently See the ATP command Test and diagnosis This command is used to perform a test and diagnosis function according to the specified parameters If you want to terminate a test you must first enter the escape codes with the exception of parameters 7 and 8 0 End test 1 Start local analog loopback V54 L3 3 Start local digital loopback V54 L2 4 Confirmation of digital loopback for remote request on default 5 Confirmation of digital loopback for remote request off 6 Request for a remote digital loopback
65. uffers are cleared and a break signal is sent to the remote modem As 0 A break signal is sent immediately to the remote modem As 2 A break signal is sent to the remote modem with the data processing takes place in the order of sending As 4 default When a break signal is received from a remote modem the following occurs 0 4 de 3 The data buffers are cleared and a break signal is sent to the terminal As 1 A break signal is sent immediately to the terminal As 2 Allied Data Technologies TRON DF56 0 4 A break signal is sent to the terminal with the data processing takes place in the order of sending 5 As 4 default ATK AT K ATL Voice Data switch This command is used to convert a V42 LAPM connection to a MNP10 connection 0 Conversion off default 1 Conversion on V42 MNP10 conversion This command is used to convert a V42 LAPM connection to a MNP10 connection 0 Conversion off default 1 Conversion on Loudspeaker volume The parameters for this command are used to set the modem loudspeaker volume 0 Volume low 1 Volume low default 2 Volume normal 3 Volume high N B Use the ATM command to switch off the loudspeaker UK TRON DF56 0 AT L ATM AT amp M List of dialback entries with passwords The modem will display dialback entries with passwords and telephone numbers that have been stored in the memory with AT P Since there are as much a
66. y Forces AT amp Q5 S36 4 S48 128 Use this setting with Remote Configuration see AT R On line data mode Originate This command causes the modem to switch from on line command mode to on line data mode If the modem is in off line command mode you will receive the message ERROR With the parameter 1 a retrain is performed before the modem switches back to on line data mode Pulse dialling Pulse dialling is not supported This AT command is still executable for compatibility reasons Allied Data Technologies TRON DF56 0 UK AT P ATQ AT Q AT amp Q Programme dialback entries Save or delete an dialback entry with password and optionally a telephone number The dialback entry is directly stored in permanent memory The AT amp W command is NOT neccesary to store an entry Syntax AT Pn lt access code gt telephone number at which n 0 99 The password must be at least 5 characters and at the most 8 characters of length The telephone number may be 16 characters of length at the most A maximum of 100 dialback entries can be entered Entry of the telephone number is optional If omitted the modem will perform a password check only If the password checks the modem will establish a connection immediately See paragraph 5 4 User access control and automatic dialback and the AT L command Response on off Quiet This command determines whether or not the result codes are sent to the terminal 0 Re
67. y of the telephone number will return the TRON DF56 0 to command mode after the commands before the character have been processed You can then enter extra AT commands while the modem is on line The extra AT commands may also be entered on the original command line after the character The TRON DF56 0 only continues dialling if an extra command without the character is entered You can then interrupt the dialling with the ATH command May only be used to make things clear The modem ignores these characters DTR status Data Terminal Ready Determines the response of the modem if DTR is disabled 0 Ifthe DTR signal is disabled the default settings of amp Q are affected as follows amp Q0 amp Q5 amp Q6 The DTR signal is ignored and the modem works as if the signal were enabled This makes it possible to work with terminals with no DTR signal Allied Data Technologies UK TRON DF56 0 amp Q1 amp Q4 When the DTR signal is disabled the modem is switched off line This will not affect auto answer amp Q2 amp Q3 When the DTR signal is disabled the modem is switched off line Auto answer is not possible 1 Ifthe DTR signal is disabled the default settings of amp Q are affected as follows amp Q0 amp Q1 amp Q4 When the DTR signal is disabled the modem amp Q5 amp Q6 responds as if an asychnonous escape code has been received The modem returns to the asynchronous command mode without disconnect

TRON DF56.0 User manual

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