Modem 2 Manual
Contents
1. ATCommands 31 2 V 22bis 2 400 or 1 200 3 V 23 1 200 9 V 32 9 600 or 4 800 10 V 32bis 14 400 12 000 9 600 7 200 or 4 800 11 V 34 33 600 31 200 28 800 26 400 24 000 21 600 19 200 16 800 14 400 12 000 9 600 7 200 4 800 or 2 400 12 V 90 56000 54667 53333 52000 50667 49333 48000 46667 48000 46667 45333 42667 41333 40000 38667 37333 36000 34667 33333 32000 30667 29333 28000 56 K56flex 56000 54667 53333 52000 50667 49333 48000 46667 48000 46667 45333 42667 41333 40000 38667 37333 36000 34667 33333 32000 64 Bell 103 300 69 Bell 212 1 200 Automode parameter With the optional automode parameter it is possible to determine if the modem can automatically adapt to the required modulation type The following valuesare accepted 0 Automatic adaptation to modulation disabled 1 Automatic adaptation to modulation enabled Receive Minbaud parameter The optional minbaud parameter sets the lowest possible baud rate at which the modem receives Receive Maxbaud parameter The optional maxbaud parameter sets the highest possible baud rate at which the modem receives Parameter u Law A Law Selection of the ISDN coding Reserved parameter always0O Send Speed Maxbaud parameter The optional maxbaud parameter sets the highest possible baud rate at which the modem sends data Example AT MS 12 1 300 56000 0 0 33600 automatic adaptation to remote terminal minimum speed o2. 5 5 5 0 XON or XOFF character When the input buffer of the modem has exceeded a predetermined XO FF fill level the modem inserts an XOFF character into the data stream to the connected device This character causes the connected device to stop sending data Note Support of XON XOFF flow control by the modem depends on the setting of the command AT amp K Support of XON XOFF flow control by the PC depends on the software currently running on the PC Once the modem has processed the contents of the buffer such that it falls below a predetermined XON fill level the modem includes the XON character in the data stream This character causesthe connected device to start sending data again to the modem In a similar manner the connected device can control the data flow from the modem to the connected device The XON XOFF process is only possble if the XON or XOFF characters are not present in the transmitted data asa rule only for ASCII texts When transmitting programs e g using XMODEM transmission protocol any XON or XOFF characters appearing randomly would interrupt operation 4 10 6 Data How Control between Modems Software data flow control between two modems for non emor corrected data transmission without V 42 or MNP4 Phone line For non emor corrected data transmission V 42 and MNP4 inactive modem can intemupt the other by inserting a XOFF
3. Form of connect messages AT amp V Display configuration Define alam text AT Request alarm text ATW Messages for enor correction AT amp W Store configuration ATX Extended result messages dial tone detection AT X End remote configuration ATY Long break AT amp Y Select user configuration at hardware reset ATZ Software reset load setting AT amp Z Store phone numbers 21 22 OperatorsManual 5 2 Description ATCommands When the modem receives an AT command it adapts automatically to the baudrate the number of data bits and the byte length of the data from the PC Every AT command starts with the characters AT and ends with a camage retum character CR Capitalization is ignored but the leading characters have to be either AT or at The command line is evaluated as soon as the modem has received the camage retum character A parameter given in parentheses n means in the description that this is optional For example ATL n where n can take on the values 0 to 3 e g ATL2 medium volume For commands which expect a parameter but are entered without parameter the modem assumes the value 0 automatically The command forexample causesthe same effect like the command ATZO 5 2 1 Overview About AT Commands Command Description AT Starting the flash loading function ATA Answer mode The modem is set into answer mode manual answer In certain countries such as Gemmany this is onl
4. 4 2 Reset There are two typesof resets hardware reset and software reset A hardware reset takes place when connecting the power supply or performing a warmm cold start at the A software reset is performed with the command ATZ Both possibilities of the reset result that a complete test of the modem hardware is performed duration approx three seconds During this time some control LEDs light up n case of a hardware reset switching on RESET key or start of the PC for plug in board a user setting is loaded to the cument modem configuration It depends on an eventually preceding AT amp Y command whether user setting 0 AT amp Y0 or user setting 1 isloaded AT amp Y1 n case of a software resetthe user setting or 1 istaken overto the current modem configuration ATZ and ATZO result loading the user setting O ATZ1 result loading the usersetting 1 4 3 Enor Correction and Data Compression The Modems support the V 42 emor correction protocol including Microcom Networking Protocol MNP Levels 2 3 4 MNP2 MNP3 MNP4 and data throughput optimization MNP10 4 3 1 Error Correction 4 3 1 1 V 42 Enor Correction V 42 emor correction contains the LAP M and MNP4 protocols LAP M is the preferred error correction Link Access Procedure for Modems MNP4 is supported for reasons of compatibility with other MNP modems Both methods lay frames around the actual data to be transmitted and employ CRC Cyclic Re
5. 01712521002 AT amp Z2 number of the mobile phone in the format 49171 D2 network AT M4 AT amp Z0 01722278000 AT amp Z2 number of the mobile phone the format 0172 E network AT M1 AT amp Z0 01771167 AT amp Z2 number of the mobile phone in the format 49177 ATcommands forthe SMS dispatch Command Description AT amp ZO Sets the service center number of the mobile phone provider The numbers given here assume that no outside line hasto be accessed When using a PABX the number must be completed with the according access sequence AT amp Z2 Defines the number of the mobile phone to which the SMS will be sent The different network providers support like shown above different formats for transmitting the phone number AT Mn Definesthe protocol for sending the alarm string to the network provider AT MO Sets a standard analogue modem asremote terminal alarm function so far 16 OperatorsManual AT M1 Sets D1 or Enetwork as remote terminal AT M4 Sets D2 network asremote terminal AT V Enters the alarm text max 160 characters ATSA Tiggersthe alam function text message or SMS 13 Sets the number of dialing attemptsin case of alarm 4 10 Serial Data Transmission 4 10 1 Automatic Baudrate Detection The modem detects the baudrate of the connected PC from the AT characters preceding every command This is also known as DTE or i
6. ATS Write to read from S register Some S registers can only be changed within certain limits modem still gives an OK even if the value has not been altered as shown Some registers can only be read It is therefore recommended to check the results of a write to the register with the ATSn command ATSn x Setsthe S register n to the value x ATSn Shows the value of the Sregister n AT amp S DSR options This command determines how the modem respondsto its DSR CT107 output 850 DSR alwayson amp S1 DSR on once a reply tone is detected DSR offonce carierisno longerdetected ATT Enable tone dialing Once this command has been executed all subsequent calls will be dialed using tone dialing until eitheran ATP or ATDP Command is executed to revert to pulse dialing ATCommands 35 Command Description AT Un Selectthe protocol atthe serial interface You can pre select the protocol with this command But the auto detection will not be tumed off If an AT command is detected the serial interface triggers automatically the detected speed and detected protocol If no AT command is sent the selected protocol rests until a hardware reset If you wanted to store the used protocol you have to save it with AT amp W Important The Sregister 23 will not be changed with this command This will only be changed with the auto speed and protocol detection AT UO 8 data bits no parity 1 stop
7. S17 the ASCII code of the character used to start the remote configuration is defined Values 2127 switch off remote configuration completely Default setting of S17 is 42 which is ASCII character i e the remote configuration is started with the escape sequence Pause Pause Note The number of characters the escape sequence is fix set to 4 General Bitmapped Options Status settings for V24 CTS behavior CT106 necon behavior 0 as for AT amp RO 1 asforAT amp R1 E 4 DTR behavior CT108 DTR behavior 0 asfor AT amp DO asforAT amp D1 2 asfor AT amp D2 3 asfor AT amp D3 0 asforAT amp CO as forAT amp C1 0 asforAT amp SO 1 asforAT amp S1 Bit 7 Long space disconnect Long space disconnect Ee as forATY1 46 OperatorsManual S22 Speaker Results Bitmapped Options Status Bit Signification Bit O 1 Speaker volume Speaker volume 0 Off 1 Quiet 2 Medium 3 Loud Bit2 3 Speakerfunction Speaker control 0 Off 1 Off till ca mer 2 Alwayson 3 On during set up Bit4 6 Eror message group Limit results codes 0 Like ATXO 4 Like ATX1 5 Like ATX2 6 Like ATX3 7 Like ATX4 S25 Delay to DTR Off The time that the modem pemnits the DTR signal to remain off before hanging up in hundredths of a second S26 RTS to CTS Delay Time between the activity of RISand CTSin 1 100 second S29 Flash Dial Modifier Time Sets the time i
8. With the semicolon the modem gets back to the command mode after dialing for private branch exchanges which get the local loop with a or a 9 First blind dialing must be activated with look also ATX3 command to dial the leading 0 without hearing a dial tone After the dialing of the O with po the dial tone detection can be reactivated with the parameter w Though the modem waits for the dial tone AND finalizes the dialing with 12345 only if the dial tone was heard The waiting for the dial tone can be dropped with the command ATX3D012345 For private branch exchanges which get the local loop by earth function First blind dialing must be activated with look also ATX3 command to obey the earth function without hearing the dial tone After the activity of the earth by gt the dial tone detection can be reactivated with the parameter w Though the modem waits for the dial tone AND finalizes the dialing with 12345 only if the dial tone was heard The waiting for the dial tone can be dropped with the command ATX3D12345 26 OperatorsManual Command Description AT amp D DTR CT108 2 operation DIR CT108 2 operation monitoring of On Off state changes of RS232 connectionson the PC AT amp DO DTR is ignored permits operation with PC sthat do not support DTR AT amp D1 A DTR On Off change causes the modem to act as though it had received a break
9. X X 84 CONNECT 33600 X X X 91 CONNECT 31200 X X X 150 CARRIER 32000 X X X 151 CARRIER 34000 X X X 152 CARRIER 36000 X X X 153 CARRIER 38000 X X X 154 CARRIER 40000 X X X 155 CARRIER 42000 X X X 156 CARRIER 44000 X X X 157 CARRIER 46000 X X X 158 CARRIER 48000 X X X 159 CARRIER 50000 X X X 160 CARRIER 52000 X X X 161 CARRIER 54000 X X X 162 CARRIER 56000 X X X 165 CONNECT 32000 X X X 3 KK OX OX OX OX OX OX OX OX OX OX OX OX OX OX OX OX XXX XXX 0X 0X 0X 0X 0X 0X 0X 0 0X XXX XxX XxX X OX OX OX OX OX OX OX OX OX OX OX OX OX OX OX OX OX XXX XXX 0X 0X 0X 0X 0X 0X 0X 0 0X 0X XXX XxX XxX X 40 OperatorsManual Message Message text in long form ATXn number 0 1 2 n 3 4 short form 166 CONNECT 34000 X X X X X 167 CONNECT 36000 X X X X X 168 CONNECT 38000 X X X X X 169 CONNECT 40000 X X X X X 170 CONNECT 42000 X X X X X 171 CONNECT 44000 X X X X X 172 CONNECT 46000 X X X X X 173 CONNECT 48000 X X X X X 174 CONNECT 50000 X X X X X 175 CONNECT 52000 X X X X X 176 CONNECT 54000 X X X X X 177 CONNECT 56000 X X X X X 178 CONNECT 230400 X X X X X 180 CARRIER 28000 X X X X X 181 CARRIER 29333 X X X X X 182 CARRIER 30667 X X X X X 183 CARRIER 33333 X X X X X 184 CARRIER 34667 X X X X X 185 CARRIER 37333 X X X X X 186 CARRIER 38667 X X X X X 187 CARRIER 41333 X X X X X 188 CARRIER 42667 X X X X X 189 CARRIER 45333 X X X X X 190 CARRIER 46667 X X X X X 191 CARRIER 49333 X X X X X 192 CARRIER 50667 X X
10. X X X 193 CARRIER 53333 X X X X X 194 CARRIER 54667 X X X X X Notes to the table An X in the column meansthat a message issent either in long form or in short form according to ATV command The numbers 0 to 4 in the heading mean the parameters for the commands ATXO 0 ATX4 If a numberisin a column this meansthat an emor message according to this emor number is put out S Register 41 6 S Register Sregisters can be read and written with the ATS command See chapter 8 AT command set command ars Certain Sregisters can only be read while others can only be set within a limited range of values If a value limit is exceeded the modem will respond even though the value is not accepted Therefore it is recommended to check the contents of a register after changeshave been made by use of the ATSn command 6 1 Overview S Register Register Function Units stored in EEPROM with SO Rings to Auto Answer Rings S1 Ring Counter Rings S2 Escape Character ASCII S3 Retum Character ASCII S4 Line Feed Character ASCII S5 Backspace Character ASCII S6 Wait Time for Dial Tone S 57 Wait Time for Carrier S S8 Pause Time for Dial Delay S Modifier S9 Carrier Detect Response Time 0 15 510 Carrier Loss Disconnect Time 0 15 511 Data Transmit Control 1s 2 S12 Escape Prompt Delay 0 02 s S13 Number of dial attemp
11. X X X X X 2 RING X X X X X 3 NO CARRIER X X X X X 4 ERROR X X X X X 5 CONNECT 1200 1 X X X X 6 NO DIAL TONE 3 3 X 3 X 7 BUSY 3 3 3 X X 8 NO ANSWER 1 X X X X 9 CONNECT 600 1 X X X X 10 CONNECT 2400 1 X X X X 11 CONNECT 4800 1 X X X X 12 CONNECT 9600 1 X X X X 13 CONNECT 7200 1 X X X X 14 CONNECT 12000 1 X X X X 15 CONNECT 14400 1 X X X X 16 CONNECT 19200 1 X X X X 17 CONNECT 38400 1 X X X X 18 CONNECT57600 1 X X X X 19 CONNECT 115200 1 X X X X 20 CONNECT 230400 X X X X X 22 CONNECT 75TX 1200RX 1 X X X X 23 CONNECT 1200TX 75RX 1 X X X X 24 DELAYED 4 4 4 4 X 32 BLACKLISTED 4 4 4 4 X 33 FAX X X X X X 35 DATA X X X X X 40 CARRIER 300 X X X X X 44 CARRIER 1200 75 X X X X X 45 CARRIER 75 1200 X X X X X 46 CARRIER 1200 X X X X X ATCommands Message Message text in long form ATXn number n 0 n 1 n 2 short form 47 CARRIER 2400 X X X 48 CARRIER 4800 X X X 49 CARRIER 7200 X X X 50 CARRIER 9600 X X X 51 CARRIER 12000 X X X 52 CARRIER 14400 X X X 53 CARRIER 16800 X X X 54 CARRIER 19200 X X X 55 CARRIER 21600 X X X 56 CARRIER 24000 X X X 57 CARRIER 26400 X X X 58 CARRIER 28800 X X X 59 CONNECT 16800 1 X X 61 CONNECT 21600 1 X X 62 CONNECT 24000 1 X X 63 CONNECT 26400 1 X X 64 CONNECT 28800 1 X X 66 COMPRESSION CLASS 5 X X X 67 COMPRESSION V 42 bis X X X 69 COMPRESSIO N NONE X X X 70 PROTOCOL NONE X X X 77 PROTO COL LAP M X X X 78 CARRIER 31200 X X X 79 CARRIER 33600 X X X 80 PROTOCOL ALT X X X 81 PROTOCOL ALT CELLULAR X
12. bit AT U1 7 data bits parity ODD 1 stop bit AT U2 7 data bits parity EVEN 1 stop bit AT U3 7 data bits no parity 1 stop bit AT U4 7 data bits parity ODD 2 stop bits AT U5 7 data bits parity EVEN 2 stop bits AT U6 7 data bits no parity 2 stop bits AT U7 8 data bits parity ODD 1 stop bit AT U8 8 data bits parity EVEN 1 stop bit AT U9 8 data bits no parity 2 stop bit ATV Style of modem message This command determines whether the modem sends messages to the PC in long form or short form ATVO Messages to the PC in short form i e only the eror number ATV1 Messages to the PC in long fom i e the error text Form of the connect messages This command enables the display of the connect message in one NV1 or in three vo lines AT amp V Display configurations This command activates the display of cument active configuration of the modem the stored user configurations and stored telephone numbers 0 to 3 ATV Definesthe alam text After you call this command the modem asks for the alam text In the remote mode you can not use this command ATV Requests the alarm text With this command you can check the alarm text 36 OperatorsManual Command Description ATW Eror correction messages This command defines which specification of data transmission rates are made fora CONNECT message ATWO The modem sends the baudrate between the modem and the PC ATW1 The modem sends the speed of the telepho
13. character into the data stream when the XON XOFF protocol isactivated by the command AT G1 Functions 19 New data can be requested by inserting a XON character into the data stream The XON XOFF characters are inserted depending on the fill state of the modem buffer Normally the XON XOFF characters received from the other modem are evaluated by the modem and not forwarded to the PC However there isthe possibility to evaluate XON XOFF characters received from the other modem and to forward them transparently to the PC For this see chapter 8 AT command set command AT amp K Errors may occur when data contains the characters for XON and or XOFF accidentally This is only impossible when pure text files are transferred 4 10 7 Software Data How Control Between Two Modems With Error Conected Data Transmission V 42 MNP4 Emor corrected data transmissions V 42 or MNP 4 have their own method of data flow control A possibly activated XON XOFF data flow control between two modems ATNG1 is ignored 4 10 8 Interface Lines Influenc ed BY ATCommands AT amp C AT amp D AT amp R AT amp K AT amp S 20 OperatorsManual 5 AT Command Set Not all AT commands are available for the different modems see table Technical Data orenclosed short description 5 1 Overview Basic Commands Command Description S
14. is set in the S8 register L Redialthe last number dialed H ATCommands 25 S n Examples ATD12345 ATDP12345 ATDT12345 ATD12345 ATX3D0W12345 Retum to input mode after dialing This is placed at the end of a dialing string and causes the modem to be retumed to input mode when the is reached with response ok This allows AT commands to be entered even with the handset off hook Any additional ATcommandscan be included in the same line as the character or sent as additional input lines The connection can be broken with the ATH command and the handset can be replaced Dial the nth number from the number memory that was entered with the AT amp Z command Flash If the flash character is in a dialing string the modem hangs up afterthe time specified in the S29 register and then goes off hook again If the gt character is in a dialing string the modem acts as though the earth key was pressed thereby putting one of the two phone linesto earth Some telephone systems require this to accessan exchange line Suppresses the transmission of a calling tone Default is Call tone sent on fax operation no call tone for data operation Ignored these are only used to assist clarity Ignored these are only used to assist clarity Spacesare ignored they are only used to assist clarity Dial the telephone number 12345 Dial with pulse dialing the number 12345 Dial with tone dialing the number 12345
15. right input of the password the intrinsic connection is established and data can be transmitted If the password was wrong the modem hangsup It sthe same password asthe one of the remote control and can be set with AT C S register 14 Bit 6 Quiet control This command switches on or off the sending of messages from the modem to the PC ATQO Send messages to the PC ATQ1 Send no messages to the PC AT Q Fall back to V 22bis and V 22 00 prevents fall back to V 22bis and V 22 AT Q1 enables fall back to V 22bis or V 22 respectively Display phone connection qua lity A modem message with a value between 000 and 007 denotes a good quality telephone connection The lowerthe value the betterthe quality High values indicate poor quality These values are constantly updated during a call If the value increases much during a call i e the quality has deteriorated an Autoretrain is executed providing a preceding ATSE command has enabled this facility AT amp R RTS CTS options This command determines how the modem responds to RTS CTS CT105 C T106 flow control connections see also the AT amp K command AT amp RO CTS reaction as V 25bis AT amp R1 RTS signals are ignored CTS only goes to off if required by flow control ATR Tum on off remote control AT RO Tums off remote control AT R1 Tumson remote control 34 OperatorsManual Command Description
16. save a password for remote control into the modem After the AT C command you are asked for the old password OLD PASSWORD default is QWERTY or BEISPIEL An incorrect input leadsto ERROR If the input was right you can enter the new password It must be between 6 and 12 characters in length Then the modem asks you to confirm the new password CONFIRM AT amp C DCD CT109 options Behavior of RS232 DCD output of the modem AT amp CO DCD isalwayson amp 1 DCD follows the telephone line camer signal 24 OperatorsManual Command Description ATD Dial dialing string The modem lifts up and dials in accordance with the dialing string given by the ATD command After dialing the modem attempts to establish a connection If the ATD command is sent without a dialing string then the modem opens the line and attempts to make a connection with the remote modem without dialing The behavior of the modem is dependent upon whether or not line current detection isactivated see ATX Command Operation of the ATD command is also dependant upon when the last dialing attempt was made see chapter Dial delay In FCLASS 0 mode the modem acts asa data modem It attempts to make contact with another data modem The attempt is continually repeated until the waiting time limit set in the S7 registerhas expired Should this time limit be exceeded then the modem hangs up and displays the emormessage NO CARR
17. the message shown is NO CARRIER ATX3 No dial tone detection this means that an unsuccessful dial attempt leads to the message CARRIER Engaged tone detection active this means that when calling a busy line the message Busy isgiven ATX4 Dial tone detection active this means that a dial attempt without the presence of a dial tone being detected leads to the message NO DIAL TONE Engaged tone detection active this means that when calling a busy line the message BUSY is given ATCommands 37 Command Description Ending the remote configuration The AT X command endsa remote configuration ATY Long space Break This command determines the action of the modem on receipt of a long space BREAK orin what form the modem producesa long space ATYO No break processing ATY1 Break processing active On reliable links the modem sends a break of 4 seconds before hanging up The modem responds to the receipt of a break longer than 1 6 seconds by hanging up AT amp Y Select user configuration for hardware reset AT amp YO On a hardware reset following the command AT amp YO user configuration O produced with the AT amp WO Command is loaded asthe current modem configuration AT amp Y1 On a hardware reset following the command AT amp Y1 user configuration 1 produced with the AT amp W1 Command is loaded asthe curent modem configuration ATZ Software reset load configuration This comma
18. 0 Introduction 2 4 Phone Interface TAE plug with contacts In top vlew RJ12 plug with nose downward Co I O1 RJ12 plug front pem 123456 Layout of the Westem plug and the RJ 45 jack R gt Description NC E LA1 LA LB LB1 W e OperatorsManual 2 5 Transmission Standards Protocols DC 56k V 21 V 22A B V 22bis V 23 V 23 half duplex V 32bis V 34 V 34 V 90 56k flex Bell 212A and 103 V 29 V 27ter V 21 channel 2 V 17 Fax Group 3 send receive Fax Class 1 command set yes yes yes yes no yes yes yes yes yes yes yes yes yes yes up to 14 400 bps yes Fax Class 2 command set yes V 42LAP M errorcorrection yes MNP 2 4 enor conection yes MNP 10 eror correction yes V 42bis data compression yes MNP 5 data compression yes Voice functions yes ASVD no Remote Control yes Automatic callback yes Introduction 5 2 6 TU Standards CCITT Bos represents the number of transmitted bits per second Duplex is simultaneous transmission in both directions standard CCIM Transmission with 300 bps duplex Send with 75 bpsand receive with 1 200 bpsor reverse V 23 Send and receive with 1 200 bps Half duplex Transmission with 1 200 bps duplex V 22bis Transmission with 2 400 bps duplex Transmission with
19. 232 interface SubD9F Powersupply 9 10 V DC Data rate up to 56 kbps Functions Miscellaneous Introduction 2 Technical Data 2 1 Mechanical Features DC 56K Weight 150g Dimensions in mm b xIxh 71x128 x22 Temperature range 09 55 C Protection class Housing IP40 Terminal IP 20 Humidity 0 95 not condensing Note The DC 56K may not be used in wet environments 2 2 Interfaces and Display Elements 2 2 1 DC 56K front view The DC 56K hastwo LEDs for status display These have the following importance Importance Color Description Power green On when power supply exists Off Hook red On when modem is off hook this makes line busy 2 OperatorsManual 2 3 Serial Interface Layout of the 9 pin D Sub jack 9 9 pin D Sub jack Description of the signals at the 9 pin D SUB jack of the DCE SS wa ie 2 rT V 24 RS232 66020 to DIE DCD jDataCamerDetect 19 CF 5 O 5 elo uU 3 JmansetData 13 44 Data TerminalReady 18 cD 59 1 5 GND Ground 2 6 848 DataSetReady 107 cc 0 7 15 ca 2 8 5 16 CB 2 0 9 4 Ring Indication 125 0 Interface speedsof the DC 56K Baudrate in bps 300 600 1 200 2 400 4 800 9 600 14 400 19 200 28 800 38 400 57 600 115 20
20. 9 600 bps or fallback 7 200 4 800 bps V 32bis Transmission with 14 400 bps or fallback 12 000 9 600 7 200 4 800 bps Transmission with 28 800 bps or fallback 26 400 24 000 21 600 19 200 16 800 14 400 bps Transmission with 28 800 bps or fallback 26 400 24 000 21 600 19 200 16 800 14 400 bps V V K56flex Transmission with 56 000 bps or fallback 54 000 52 000 50 000 48 000 46 000 44 000 42 000 40 000 38 000 36 000 34 000 32 000 bps V Eror protection method for DCEs with asynchronous synchronous conversion V 42bis Data compression method V 25bis Altemative command set to set V 90 Transmission with 56 000 bps or 54 667 53 333 52 000 50 667 49 333 48 000 46 667 45 333 42 667 41 333 40 000 38 667 37 333 36 000 34 667 33 333 32 000 30 667 29 333 28 000 bps bis french second extended 34 34 Transmission with 33 600 bps or fallback 31 200 28 800 26 400 24 000 21 600 19 200 16 800 14 400 bps 42 OperatorsManual 3 3 1 Start Up Installation Steps Onthe backofthe extemal modems you find three terminals The power supply jack The phone line jack The 9 pin jack for the connection with the serial interface of your computer Please proceed as follows for starting up the extemal version 1 Connecting the power supply Connect the delivered power supply plug into the modem and then the mains adapter plug into the wall so
21. DYNACORD Operators Manual Modem DC 56K Copyright 2003 EVI Audio GmbH Every copy of this manual as well as the enclosed software is not allowed All rights at this documentation and at the modems lie with EVI Audio GmbH Straubing Germany Restriction of warranty This handbook contains a as concise as possible description of the modem Whilst every care has been taken in compiling the text emors can not be completely ruled out No guarantee can therefore be given forthe accuracy of the contents We accept no legal orother liability for incomect information given and any consequences thereof Suggestions for improvements and notification of emorsare gladly accepted Trademarks The use of a trademark not shown below is not an indication that it is freely available foruse MNP isa registered trade mark of Microcom Inc IBM PC AT XT are registered trade marks of Intemational Business Machine Corporation Windows isa registered trademark of Microsoft Corporation Publisher EVI Audio GmbH Hirsc hberger Ring 45 94315 Straubing Germany Tel 49 9421 706 0 Fax 49 9421 706 265 website www telex com Content l l 1 2 2 1 22 24 2 5 2 6 3 1 3 2 4 1 4 1 1 4 1 2 4 1 3 4 3 4 3 1 4 3 1 1 4 3 1 2 4 3 2 4 3 2 1 4 3 2 2 4 5 4 6 4 6 1 4 6 2 4 6 3 4 6 4 INTRODUCTION SCOPE Or DELIVERY GENERAL TECHNICAL DATA MECHANICAL FEATURES INTERFACES AND DISPLAY ELEMENTS SE
22. HONE NUMBERS The factory settings of your modem may differ from the shown setting for technical reasons 4 1 2 Storing the Current Configuration Into A User Setting If the modem hasbeen adjusted for specific user requirements it is possible to save this setting in user configuration 0 or 1 by using the commands AT amp WO or AT amp W1 respectively These settings are then automatically loaded as the Current modem configuration at the next reset Fora user configuration 0 or 1 to be loaded on a hardware reset depends upon whether a command AT amp YO Or AT amp Y1 respectively has been previously given A software reset ATZ or ATZO command results loading the user setting 0 an ATZ1 command results loading the user setting 1 4 1 3 Restoring the Initial Delivery State AT amp F Restoring the initial delivery state If the modem is to be reset to delivery state the factory setting has to be loaded to the cument modem configuration first This takes place with the command AT amp F AT amp WO Then the current modem configuration will be transferred to the cument user setting O with the command AT amp WO AT amp W1 cormesponds with user setting 1 AT amp YO An AT amp YO command results finally that the user setting O now identical with the factory setting is loaded to the current modem configuration for every following hardware reset AT amp Y1 Cormesponds with user setting 1 ATZ A software reset is executed 10 OperatorsManual
23. IER In FCLASS 1 or FCLASS 2 the modem acts as a fax modem It will attempt to make a connection to another fax modem or fax machine The modem adopts HDLC V 21 Channel 2 receive status acting as though the AT FRH command had been executed The following characters may be sent as parameters parentheses space and dashesare ignored 0 to 9 Digits 0 to 9 inclusive only with tone dialing only with tone dialing A D Tone dial charactersA B C D P Specify pulse dialing tone or pulse dialing may be necessary depending upon location Specify tone dialing tone or pulse dialing may be necessary depending upon location W Await Dial tone The modem waits for the dial tone before commencing dialing If no dialtone is received within the time limit set in the S6 register the modem hangs up and no eror message is displayed Await silence the modem waits for at least 5 seconds silence on the line before executing the next character in the parameter string If this 5 second silence is not detected and the break off time specified in the S7 register is not exceeded the modem endsthe call with the message NO ANSWER If the engaged tone detection is activated the modem ends the call with the message BUSY If a reply tone is received from the remote modem during the waiting period a connection is made 7 Dialing pause the modem inserts a pause before it executes the next character in a dialing string The pause length
24. IPION AT COMMANDS 22 5 2 1 Overview About AT Commands 22 5 3 OVERVIEW FAX AND VOICE COMMANDS 38 5 4 AT MESSAGES 38 6 S REGISTER 41 6 1 OVERVIEW S REGISTER 41 6 2 DESCRIPTION S REGISTER 43 GLOSSARY 51 FAQS 53 Introduction 1 1 Introduction This manual servesasa basisforoperating the modem type DC 56K from EVI Audio GmbH 1 1 Scope of Delivery Before installation and operation please check that the box contains all of the following parts DC 56K 1x Device 1x TAEcable 1 RS232 cable 9 pin plug jack 1x Powersupply 9 10 V DC 1x UsersManual If the content is incomplete please contact your supplier Please also inspect the modem for transport damage and in the event of damage consult your supplier Please keep packaging forfuture dispatch orstorage 1 2 General You have some advantages with the analogue desktop devices of EVI Audio and you can not think about the past without this unit The Modems support the following functions which are described in detail in the following Password request at connection set up Remote configuration after escape sequence and password entry Security Callbackto definable phone number SMS dispatch via ATcommand 2 OperatorsManual Both desktop devices described in this manual differ from each other in the following features DC 56K Dimensions in mm b xIxh 71x128x22 Status display 2 LEDs RS
25. MNP 5 Data Compression The modem supports Microcom Networking Protocol Level 5 data compression MNP5 data compression can only be used on an enor comected MNP4 connection MNP5 replaces often used characters with shorter tokens Packed data can not be packed again by MNP5 4 4 Dialing Delay Only valid for devices with BZT approval According to the regulations of Deutsche Telekom any further dialing is locked after 12 unsuccessful dialing attempts The modem hasto be switched off fora moment in this case After a successful dialing attempt the counter is reset automatically If the connection is established a dialing pause of 5 seconds will be made 12 OperatorsManual 4 5 Hash Update This function enablesa software update of the modem without changing the EPROM You receive the new software from your service partner if necessary Requirements A PC and a terminal program are required for the flash loading function The terminal program must be capable of conducting an ASCII upload ASCII data transmit protocol It is necessary to set hard flow control Also any interpretation of characters by the ASCII upload protocol must be switched off e g interpretation of TAB CR BS The baudrate must be set between 9 600 baud and 57 600 baud Any other baudrates can cause errors or damages Loading lasts approximately 2 3 minutes with a baudrate of 57 600 baud longer with lowerbaudrates Activation and process The
26. Problem The modem doesnot reacton an ATZ command Possible The Com port number or the interrupt number set in the software does not reason fit match with the modem interface number The modem has power supply oris switched off The modem is not connected to the PC PIC interface See chapter 3 Start Up Problem The modem does not dial after the dial command and displays an enor message Possible The modem is operated at a PABX The PABX requires that a O or 9 must be reason dialed first orthe ground key must be pressed before getting a dial tone But the modem requires a dial tone before dialing any digit The solution is to activate blind dialing dialing without dial tone with the ATX3 command or by adding the gt sign to the dial string see chapter 5 AT Command Set ATX command ATD command After dialing the first digit without dial tone or after executing the ground function you can reactivate the dial tone detection by adding a w to the dial string Example ATD0W12345 Problem The modem does not dial immediately afterthe ATD dial command Possible The dialing delay of 30 secondsisactive reason See chapter 4 4 Dialing Delay Problem The modem can send data but notreceive Possible The setting of the hardware handshake line DTR is not correct In most cases reason the setting AT amp D2 is correct See chapter 4 10 6 Data Flow Control Problem The modem does not work with a particu
27. RIAL INTERFACE PHONE INTERFACE TRANSMISSION STANDARDS PROTOCOLS ITU STANDARDS C CITT STARF UP INSTALLATION STEPS OPTIMIZNG THE MODEM CONNECTION FUNCTIONS SETTINGS Factory settings Storing The Curent Configuration Into A User Setting Restoring The Initial Delivery State RESET ERROR CORRECTION AND DATA COMPRESSION Error Correction V 42 Enor Correction MNP 2 3 4 Enor Correction Data Compression V 42bis Data Compression MNP 5 Data Compression DIALING DELAY FLASH UPDATE REMOTE C ONHGURATION Functionality Starting The Remote Configuration Proceeding Of A Remote Process Reduced Command Set During Remote Configuration OperatorsManual 4 6 5 Terminating The Remote Configuration Proc ess 13 4 7 SECURITY CALLBACK 14 4 7 1 Functionality 14 4 8 PASSWORD FOR CONNECTION SET UP 15 4 9 SMS FUNCTIONALITY 15 4 10 SERIALDATA TRANSMISSION 16 4 10 1 Automatic Baudrate Detection 16 4 10 2 Data Buffering For Serial Data Transmission 16 4 10 3 Direct Mode 16 4 10 4 Hardware Data How Control With RTF CTS CT133 CT106 17 4 10 5 Software Data How Conto With The ASCII Contol Characters XON And XOFF CHR 17 And CHR 19 18 4 10 6 Data How Control Between Modems 18 4 10 7 Software Data How Control Between Two Modems With Corrected Data Transmission V 42 MNP4 19 4 10 8 Interface Lines Influenced BY ATCommands 19 5 ATCOMMAND SET 20 5 1 OVERVIEW BASIC COMMANDS 20 5 2 DESC R
28. Reducing information in less information units E G frequent character sequences are replaced with short codesto be transmitted asreplacement Modem intemal module that is responsible for transmission speed Data Camer Detected Data Communications Equipment e g a Modem Data Te mina l Equip ment The DTE speed isthe interface speed between Computer and Modem Date Transmission with Computer Re conversion of analogue signalsto digital signals Opposite of analogue a digit can only have the value of O or 1 Data Set Ready this serial interface control line signals ready to receive to the modem 52 OperatorsManual DIR Data Terminal Ready this serial interface control line signals ready to receive to the modem EPROM Electrically Programmable Read Only Memory a permanent memory chip which can be deleted only with UV light The modem fimware is often stored in EPROMS Eror Transmission emors caused by poor line quality are recognized with the Recognition comection method MNP4 or V 42bis and are corrected through the modem not noticeable forthe PC AFO First In First O ut Puffer included in UART 16550 is recommended for fast transmission rates and or multita sking operating systems Firmware Modem operating software Handshake In orderto establish a data communication the two modemshave to negotiate a common speed and protocol This phase is called Handshake rnm Intemational Telecommunications Union new na
29. S and the serial interface isopened Now a normal data connection exists Outgoing data connections Security callback modem initiated connections with ATD are not influenced by the security callback function Deactivation Deactivation of the callback function is made by deleting the retum phone number with the command amp 71 ATcommands forthe security callback Command Description Set the password in the callback modem 271 Enterthe callback no in the callback modem xxx stands for the phone no Functions 15 4 8 Password for Connection Set Up If the password request is switched on with AT P1 the password request takes place afterthe CONNECT message After entering the password correctly the actual connection is established and data can be transfered If an incomect password has been entered the modem hangs up The password isthe same asforremote control and set with AT C 4 9 SMS Functionality Short description The modem can not only send the alarm message to another analogue modem but also as SMSto a mobile phone At the moment only D1 D2 and E network phonesare supported Proceeding of the SMS dispatch The text is entered with the command AT v the usual way The maximum length of the alarm text is 160 characters To send the message to a mobile phone the following settings must be made depending on your provider D1 network AT M1 AT amp Z0
30. ation is handled when setting up an MNP10 link before the modem goes into MNP10 mode AT HO Set up takes place at highest possible speed AT H1 Set up at 1 200 bps AT H2 Set up at 4 800 bps All Identification The modem sendsan identifier to the PC in accordance with the parameter ATIO Product code ATI1 Previously calculated checksum of the EPROM ATI2 Calculation of EPROM s checksum and comparison with the previously calculated checksum stored in the EPROM Output of OK if comparison cormect ATI3 EPROM firmware version number ATI4 Modem version number ATI5 Country code parameter Germany 006 Europe 253 ATI6 Data pump version number and revision AT amp K Select flow control between modem and PC Default for fax operation is RTS C TS T Online requires AT amp KO AT amp KO AT amp K3 AT amp K4 AT amp K5 AT amp K6 No flow control Select flow control RTY C TS Select flow control XO N XO FF Select transparent flow control XO N XOFF Select CTS and XON XOFF flow control ATCommands 29 Command Description Break control The modem reactsto a break command from a remote modem orfrom the PC orto an AT B command in accordance with the parameter n 1st Situation In the case of a break originating from the PC during a data connection to a remote modem ATNKO Modem goes into command mode does not send a break signal to the remote modem AT K1 Modem clears the data buffer sends break s
31. cket If you switch on the modem now the POWLED hasto be on Important Note Using a different mains adapter may result a damage of the modem the manufacturer can not take any lia bility for this Connecting the PC Connectthe 9 pin jack atthe modem with the serial interface of your computer Now start the terminal program at your PC and set itto the used COM interface The modem adapts automatically to the baudrate of your PC Connecting to phone network Now connect the delivered phone cable to the jack at the back of the modem The plug of the cable hasto snap in Connect the other side of the phone cable into the phone socket When connecting the modem to older phone sockets it may be necessary that you have to buy an adapter in a phone accessories store or request the installation of a multiple TAE N socket from your phone network provider Test of a successful installation The short tet takes place via your terminal program TeraTermPro ProComPlus Enter the command AT and press Enter If the message OK appearsat your screen then the device isinstalled successful Connection test Setup a connection eitherto another modem OR like in this example to Freenet Dial with ATD the following number 0101901929 ATD0101901929 Sta rt Up 7 Attention For PABXs which require a 0 for connection set up please enter ATX3DTO 0101901929 OFF Hook LED ison Modem dials Aftersome time max 1 min th
32. dundancy Check 16 checksums for enor checking In V 42 the possibility exists to make the modem detect whether the partner is a V 42 modem an MNP modem or a modem without error correction Then the modem can adaptto the partnerindependently See chapter 8 ATcommand set command AT N 4 3 1 2 MNP 2 3 4 Enor Conection MNP enor corection can either be operated in block or stream mode In stream mode the maximum block size be set to 64 128 192 or 256 bytes See chapter 8 ATcommand set command AT A Functions 11 MNP enor corection can be either used automatically or activated with AT commands See chapter8 ATcommand set command AT N 4 3 2 Data Compression The modem detects automatically depending on the AT C command the type of data compresson the remote modem is using or it can be set to specific type of compression orno compression Data compression is only possible for error corrected connections The use of data compression assumes that the remote modem supports the same data compression mode 4 3 2 1 V 42bis Data Compression V 42bis data compression can only operate on a V 42 connection LAP M or MNP4 For data compression V 42bis first compiles a so called dictionary with often used character sequences Then subsequently only markers for these sequences are sent to the receiving modem not the complete character sequences Packed data can not be packed again by V 42bis 4 3 2 2
33. e CONNECT message appears Freenet tresto establish a contact now The connection will be terminated after max 1 minute 7 Driver installation When using the modem under operating system Windows 95 98 a comesponding standard driver has to be selected For this refer to the menu entry Start Settings Control Panel and select Modem 3 2 Optimizing the Modem Connection In most of the cases you can leave the connection set up to the automatic functions of the modem If you have a look at the settings with the ATcommand AT MS you get e g 56 1 300 56 000 0 0 33 600 This means that a connection between 300 and 33 600 bps preferably according to V 90 will be established depending on the line quality and the abilities of the partner modem Importance of AT Q and ATSL You can request value for quality with and a value for the receive level with ATSL foran existing connection In case of an existing connection you have to change the modem to command mode before with Quality values between and 10 are good For values above 50 the modem will reduce the data rate forautomatic setting automatically 8 OperatorsManual 4 Functions 4 1 Settings The modem knowsthree different setting sets Factory setting Usersetting 0 Usersetting 1 The user can store configurations in the user settings O and 1 which he wants to use forcertain purposesin future again Each setting stores a part
34. f 300 bps The maximum receive speed is 56 000bps and the maximum send speed is 33 600bps ATM Selection of the remote terminal Determines the protocol with which the alarm string isto be sent to the network provider AT MO remote terminal normal line modem AT M1 remote terminal D1 Net or E Net AT M4 remote terminal D2 Net ANN Select eror correction 32 OperatorsManual This command determines which type of error correction isthe preferred choice to be employed forfuture connections ATNNO Disable error correction AT N1 direct mode only for special data formats ATNN2 Selects V 42 LAPM or MNP4 enor If an emor corrected link can notbe made it causesa hang up ATNN3 Selects V 42 LAPM or MNP4 enor correction If such a link is not possible a reliable link is attempted ATNNA Exclusively selects V 42 LAPM link ATNN5 Exclusively selects MNP4 link ATO Retum to on line data mode ATOO ATO1 If the modem is in online command mode it retums to online data mode If the modem online data mode it sends an ERROR message Causes retrain process before the modem goes into online data mode ATCommands 33 Command Description ATP Password request AT PO tums off the password request after the dial up AT P1 tums on the password request after the dial up If the password request is tumed on the modem asks for it after the CONNECT After the
35. flash load function is started with the command AT The modem reports Download initiated The ASCII upload of the flash load program HS LADER S37 is delivered together with the firmware file for the upload isnow conducted The progression of the transmission is indicated by dots on the monitor screen When the loading process is complete the message Download Flashcode appears Now a new ASCII upload is initiated with the firmware file 00000000537 From this moment onwards the transmission must not be interupted because this would mean that flash EPROM has been fully deleted but not completely reloaded The progresson of this upload processis also indicated by dots Checking the success When the process is complete the message Device successfully programmed appears With this the flash upload isfinished ATcommands forthe flash loading function Command _ Description AT Starting the flash loading function Note When using Telix set the time delay between signs and lines for the ASCII protocol to 0 Furthermore switch off the local echo Functions 13 4 6 Remote Configuration 4 6 1 Functionality To change into remote configuration mode a data connection must exist between the modems A specific protocol is not recommended however it is recommended to use an enor corrected connection to avoid transmission errors with the commands It isn t necessary that the local modem hasa remote confi
36. ged with this command It only changes with automatic speed detection AT FO keep current speed AT F1 300 bps AT F2 600 bps AT E3 1 200 bps AT FA 2 400 bps AT F5 4 800 bps AT F6 9 600 bps 7 19 200 bps 8 38 400 bps AT F9 57 600 bps AT F10 115 200 bps AT amp F Load factory configuration The modem loads the factory configuration from the intemal non volatile memory This allows the modem to be put into defined basic state A portion of the Sregistercan also be stored using the ATsF command Our model range is fitted with two different factory configurations AT amp FO0 and AT amp F1 Data flow control between modems XO N XOFF Disables or enables flow control on non error corected links reliable links Flow control is selected by the ASCII characters XON and XOFF The modem interupts the data transmission upon receipt of an XOFF character and re starts the transmission on receipt of an XON character Eror corrected transmissions employ their own form of flow control On enor corrected links therefore any previously entered flow controls are ignored The XON XOFF flow control should be disabled for BIX operations mode ATNGO Modem modem flow control disabled AT G1 Modem modem flow control enabled via XON XOFF ATH Disconnect The modem hangs up 28 OperatorsManual Command Description AT H Synchronize speed of connection set up protocol AT H specifies the speed at which synchroniz
37. guration can be finished with the commandsAT E und AT X so the modem goes back to data transmission mode ATZ starts a software reset 14 OperatorsManual 4 7 Security Callback The feature security callback is used fora callback of the called modem to a predefined number This function is executed after entering a password and isa safe protection for unauthorized access 4 7 1 Functionality Activation Save the callback number in the register of phone numbers of the remote modem place 1 with the standard ATcommand AT amp Z1 Incoming call When the modem answers an incoming call 50 lt gt 0 isset oracceptance with ATA approximately 2 seconds after the message CONNECT you will see the message SECURITY CALLBACK Und REMOTE PASSWORD NOW the Remote Password must be entered the security callback password is identical with the remote access password that means it is entered with the command AT C Wrong password entry The modem immediately disconnects the connection and stopsa forbidden accessto the attached device Correct password entry The modem reports to the calling terminal disconnects the connection and dialsthe phone number stored with the command AT amp Z1 after approx 10 seconds 3 call attempts are executed at all each with 10 seconds break between this Data connection If the connecttakes place approx 2 secondsafterthe Connectthe callback modem reports CALLBACK IN PROGRES
38. guration function Modem 1 Modem2 local modem remote modem 4 6 2 Starting the Remote Configuration Remote configuration is started by entering the sequence four asterisks with at least 1 second break in the data stream in front of and after the sequence The remote initial character can be changed with s17 4 6 3 Proceeding of a Remote Process If the remote modem is opened for remote configuration AT R1 it reports with the request for the password Default is QWERTY If the entered password and the password stored in the remote modem with the command AT C are equal the remote modem sends the prompt gt Now commands can be sent to the remote modem in the same way asit isa local modem 4 6 4 Reduced Command Set during Remote Configuration Some commands can not be executed during remote configuration and lead to a retum message ERROR ATA ATD ATO AT B AT C AT amp F If the entered password is wrong the modems went back to the data transmission mode 4 6 5 Terminating the Remote Configuration Process The commands AT E AT X Or ATZ can be used to terminate the remote configuration The 3 commands have the same function With ATZ the remote modem executes a software reset and interrupts the connection with this All entered commands which have not been saved with AT amp W before are deleted and the modem loadsthe user configuration 1 Forthe new devices The remote confi
39. haracter Escape character which effects a switch from data mode to online command input mode Values greater than 127 have the effect that an escape character isnot recognized Retum Character Linefeed Character Backspace Character Wait Time for Dial Tone Before Blind Dialing Maximum time to wait fora dialtone Afterthe modem haspicked up it waits fora dial tone forthe set time If a dial tone isdetected during the wait period dialing begins If no dial tone isdetected the modem checks whether dial tone detection isactivated orwhetherthe parameter W chapter8 ATcommand set ATD command is present in the dial string If the dial tone detection isinactive the modem waitsforthe time given in S6 in seconds forthe dialtone S6 can have a value between 4 and 7 Wait for Carmier Waiting for a carrier frequency from the remote modem S7 determines the maximum time that the modem waits for a reply from the remote modem The time begins to run when the modem hasfinished dialing S7 can have a value between 0 and 100 seconds 44 Operator s Manual S10 S12 Pause Time for Dial Delay Modifier Dial pause time if a comma isin the dial string The modem waits during dialing for the time specified in S8 in seconds if a comma is present in the dial string S8 can have a value between 1 and 7 seconds Camier Detect Response Time DCD reaction time fora carierfrequency received from the remote mode
40. ignal to the other modem AT K2 ASAT K1 AT K3 Send back to remote modem immediately AT K4 ASAT KO AT K5 The modem places break signal in the data transmitted to the remote modem 2nd Situation The modem is put into command mode during a data connection with the escape sequence In this condition an AT B command leads to the transmission of a break signal to the remote modem The parameter n has the following effect in this situation AT KO Modem clearsthe data buffer sends break signal to the other modem AT K1 ASAT KO AT K2 Modem sends break signal immediately to the remote modem AT K3 ASAT K2 AT K4 The modem places break sgnal in the data transmitted to the remote modem ATNK5 As AT K4 Retum from Online command mode is achieved with an ATO command 3rd Situation In the case of the reception of a break signal from the remote modem during a non error corrected link the parameter has the following effect ATNKO The modem Clears the buffer send a breakto the PC AT K1 ASAT KO AT K2 The modem sends a break to the PC immediately AT K3 ASAT K2 AT K4 Sends a break to the PC embedded the data received from the remote modem AT K5 ASAT K4 default 30 OperatorsManual Command Description Extended MNP functions MNP10 This command determines whether a V 42 LAP M link can be changed to an MNP1O link AT KO Prevents V 42 LAP M to MNP10 cha
41. ion GSIN cleardown S86 17 inactivity timer timed out S86 18 required speed not supported S86 19 long space disconnect S86 20 key abort characters have been sent during connection set up S86 22 no connection set up possible S86 23 termination after 3 retrains S86 26 remote site hung up Send level In register S91 the value forthe send level of the modem is stored The value can be set between and 15 The connection can be improved by decreasing the send level in some cases S91 0 Send level 1 dBm 591 5 Default setting for DC 56K S91 15 Send level 26 dBm 50 OperatorsManual S95 Result Code Control Bt Sgnification CONNECTmessage with line speed CONNECT ARQ message on emorcorected connection CARRIER message enabled messages 40 47 PROTOCOL message enabled messages 70 80 i Reseved Reserved COMPRESSON message enabled messages 66 69 Glossary 51 Glossary Analogue Answer ARQ ASCII Asynchronous AT Command Auto Answer Baud CD CEPT Class2 COM Port CRC CTS RIS Data compression Data pump DCD DCE DIE Demodulation Digital DSR Opposite of Digital Analogue variablescan represent any value a modem communication always one modem is receiver Answer Mode one issender Originate Mode Automatic Retransmission reQuest Only forerorcorected protocols American Standard Code for Information Interchange assigned to each letter nu
42. lar communication program Possible The communication program expects a certain type of dataflow control reason The modem setting is not accordingly Setting the modem to the required dataflow control type solves this problem Usually the communication program in use allowsan initialization string where the required settings can be added When starting the program this string is transferred to the modem See communications software users manual and chapter 4 10 6 Data Flow Control 54 OperatorsManual Problem The modem can not communicate with another modem or only with failures Possible The other modem usesa communication protocol that the local modem reason doesnotunderstand The solution isto selectthe right data compression type and emor protocol See chapter 4 3 Correction And Data Compression Problem A telephone connection can not be established Possible The modem uses pulse instead of tone dialing reason Change settings with the commands ATDP or ATDT You can determine if your phone uses pulse ortone dialing If you hear it clattering while dialing it is pulse dialing You can change the dialing type with the commands ATDP Or ATDT See chapter 5 ATCommand Set commandsATDP ATDT ATP ATT GmbH Hirschberger Ring 45 D 94315 Straubing Phone 49 0 9421 706 0 Fax 49 0 9421 706 265 Subject to change without prior notice Printed in Germany 16 05 2003 ht
43. m The DCD output of the modem s RS232 interface CT109 goes to on if a camer frequency is detected from the remote modem within the time defined in S9 in tenths of a second S9 must be less than S10 Canier Loss Disconnect Time The time of a camer loss required for the modem to terminate the connection S10 givesthe time in tenths of a second which the modem waits when the camer from the remote modem is no longer detected before disconnecting the connection Escape Prompt Delay Minimum time period in tenths of a second that must be maintained before between and after two characters so that the modem correctly detects an escape sequence nomally Number of dial attempts for ala rm Bt Number of dialing attempts Value range 1 12 Default value 3 613 determines the dial attempts for an alarm message Note The limit to a maximum of 12 attempts is required for reasons of certification blacklisting Bit 4 7 S Register 514 517 521 45 General Bitmapped Options Status Bit Signification pz i Bit 1 Echo input Command echo 0 Echo off 1 Echo on ERI 2 2 Bit 3 Results format Result codes 0 Message numbers ATVO 1 Message texts ATV1 Bit 5 Tone pulse dialing Tone pulse 0 Tone dialing 1 Pulse dialing ATP O 0 Answer mode 1 Call mode originate Remote initial character In
44. mberand special sign an 8 bit value limiting it to 256 Data transmission mode where data bits of each character are transmitted together with additional bits Start Stop Parity bit so that the other side can detect when a new character begins and if the last one was transmitted error free All commandsthat a modem understands start with AT AT for attention Modems ability to answer incoming calls automatically after a preset SO Register number of rings Step speed unit per second on the phone line or between Modem and Computer On the senal Interface this is the transmission rate in bits s On the phone line usually several bits are transmitted perstep Bulletin Board System Mailbox Software that is able to send and receive messages and files over modems or several modems French second or second Revision Bit rate unit Bits per Second Federal German Office for Telecommunication Approvals Comit Consultatif Intemational Telephonique et Telegraphique was replaced with ITU TSS Intemational Telecommunications Union Carrier Detect data camer signal was detected Commission Europ enne Postale et Telephonique The CEPT transmission protocolisbeing used for BIX Datex e g Faxtransmission standard Serial PC interface Cyclic redundancy check A procedure with which emors are detected during transmission Serial interface control linesaccording to RS232 In assistance with those lines Hardware Handshake is
45. me forthe standardizing association CCITT LAPM Link Access Procedure for Modems an enor corrected protocol LED Light Emitting Diode MNP Eror correction and date compression protocol Modem MOdulator DEModulator converts digital computer signals into analogue phone line signals Onto the opposite site analogue in digital offline Modem not connected online Modem connected Parity Test method to check data integrity on asynchronous transmissions Redundant Availability of duplicated data Reset Retum to a defined initial state 5 CTS Interface control lines for dataflow control RXD Received Data interface control line forreceiving data S Register Status register here are the Modem operating parameters stored SRB Selective Reject SRE isan error corection protocol V 42bis expansion ter French three and or third revision Terminal Program that can send an receive date using a modem program X Modem Older but very common protocol Often selected asonly common choice MA Block size only 128 Bytes low transmission rates no transmission of file names XON XOFF See Chapter Serial Data transmission ZModem Standard protocolforcomputer data transmission high transmission speed transmission of file names and paths reconnection of interrupted tra nsmissions ZModem G isan advanced but uncommon version FAQs 53 FAQs In the following some questions are described which may occur at installation
46. n selection 0 No compression 0 1 MNP5 1 2 V 42bis 2 3 MNP5orV 42bis AT C3 Bit 2 Auto retrain Auto retrain control 0 No auto retrain AT EO 1 Auto retrain ATSE1 modem 0 Off AT GO for 56k version reserved 1 ATNG1 for 56k version reserved 0 Stream mode ATNLO 1 Block mode Beck mode AE Bit Bit5 Rese Reserved Bit 6 Fallback fall forward SS forward control 0 No fallback fall forward 1 FB FF eo V 42bis Data Compression S46 136 No data compression 546 138 V 42bisdata compression on S Register 548 591 49 V 42 Negotiation Control S48 0 Only LAP M connection possible S48 7 LAP M or MNP 4 connection 548 128 Connection protocol asspecified in S36 Call Failure reason Code Ona connection break NO CARRIER an occurence ERROR code is written to this register S86 0 normal connection set up no enor S8624 carierlost S865 anenorconected V 42 connection could not be established S86 6 extensionscould not be negotiated 586 7 remote site only supports synchronous mode S86 8 mutual framing found S86 9 protocol atall could be established S86 10 invalid response when negotiating extensions S86 11 no synchronous marks received from remote site S86 12 normal connection termination by remote site S86 13 remote site doesnot react any longer ten attempts S86 14 protocol enor S86 15 DTR drop S86 16 remote site required terminat
47. n tenths of a second that the modem takes to hang up if a flash isincluded in the dial string S30 Disconnect Ina ctivity Timer The time that the modem waits without activity before it hangs up The unit is seconds fax class 1 only S31 General Bitmapped Options Status Bit 0 02680 Bit 0 Bit 1 0 3 line message Nv0 Connect message 1 extended 1 line message Nv1 Bit 2 3 Eror comection messages messages 0 PC baud rate only ATWO 1 PC and phone baud rate ATW1 2 Phone baud rate only ATW2 Bit 4 7 Reserved E S32 XON Character ASCII code ofthe characterthat isrecognized by the modem as XON S Register 47 S33 XOFF Character ASCII code of the characterthat is recognized by the modem as XOFF S36 LAPM Failure Control This register determines what happens when an attempt to set up a V 42 LAPM connection fails It is connected with register S48 Bit Signification This register determines The modem hangs up what happens if an The modem stays online and sets up attempt to set up a V 42 a direct mode connection LAP M connection fails It Reserved is used in conjunction with The modem stays online and sets up the S48 register a normal mode connection The modem tries to set up an MNP connection It hangs up if this fa ils The modem tries to set up an MNP connection A direct mode connection is made if this fa ils Rese
48. nd causes the modem to execute a software reset The modem loads the configuration saved by the user If no parameter is given then user configuration 0 isloaded ATZO Software reset followed by loading user configuration O ATZ1 Software reset followed by loading user configuration 1 AT amp Z Store phone numbers This command saves four entries 0 to 3 permanently in the EPROM Each entry may be up to 35 characters in length The entries can be overwritten and mus correspond to the dial string as specified in ATD command AT amp Zn x n is the number of the entry in the list from O to 3 x is the dial string with the phone number AT amp Z0 xxx sets the service number of the mobile provider xxx stands for number AT amp Z1 xxx entry of the reply phone number into the modem calling back xxx stands forthe phone number AT amp Z2 xxx phone number of the mobile phone xxx stands for number for SMS alam Pause Pause starts the remote configuration of the local modem 38 OperatorsManual 5 3 Overview Fax And Voice Commands Please referto your supplier for more detailed documents about the commandsof Fax Class2 aswell asa documentation of the voice commands 5 4 AT Messages List of the message numbersand textsdepending on the ATX command Message Message text in long form ATXn number 0 n l n 2 n 3 n 4 short form FC ERROR X X X X X 0 OK X X X X X 1 CONNECT
49. ne cable the mistake protection protocol and the PC baudrate ATW2 The modem sends the speed of the telephone cable AT amp W Store configurations This command saves the actual configuration of the modem including the s registers in one of the both user defined defaults AT amp WO Saving in user default 0 AT amp W1l Saving in user default 1 ATX Extended result reporting dial tone detection This command determines which group of messages are sent to the PC by the modem This is important on PBX s asa leading 0 or 9 must be dialed before a dial tone is heard on the line Blind dialing dialing without having a dial tone is activated or deactivated depending on parameter Dial tone detection however can always be forced with the W parameter in an ATD dial string see ATD command AT FCLASS 1 2 mode the modem always sends the CONNECT message to the PC on call set up without giving the transmission speed The table in chapter eleven shows the messages with reference to the ATX parameter ATXO No dial tone detection this means that an unsuccessful dial attempt leadsto the message NO CARRIER No engaged tone detection this means that on a busy line the message shown is NO CARRIER ATX1 ASATXO ATX2 Dial tone detection active this means that a dial attempt without the presence of a dial tone being detected leads to the message NO DIAL TONE No engaged tone detection this means that on a busy line
50. nge AT K1 Allows V 42 LAP M to MNP10 change ATL Speaker volume This command controlsthe speaker volume see ATM ATL1 speakerlow volume ATL2 speaker medium volume ATL3 speaker high volume Note The speaker output is optional and not supported in the standard version ATA Display level of received signal The value indicated by the modem isthe amplified signal in the modem not the level on the phone line Large AT L values indicate a low signal level small valuesa large signal level 009 9dB 043 43 dB Speaker control This command controlsthe activity of the speaker see command ATL ATMO speaker always OFF ATM1 speaker ON when dialing and connection set up ATM2 speakeralways ON ATM3 speaker ON at connection set up Note The speaker output is optional and not supported in the standard version Command Description ATHMS Select modulation type The modulation type isset with the AT ms command The command enablesor disablesautomatic modulation detection and setsthe highest and lowest possible connection speed The command isin the form AT MS MODULATION Automode Receive Minbaud Maxbaud n Law A Law reserved Send Speed Maxbaud AT MS displays the current setting AT MS displays a list of possible parameters Modulation parameter The modulation parameter sets the preferred automode 1 or the specified Automode 0 modulation type The following values are available 0 V 21 300 1 V 22 1 200
51. nterface speed that is the speed between the modem and the computer The modem can communicate with the baudrates according to type 300 600 1 200 2 400 4 800 9 600 19 200 38 400 57 600 115 200 and 230 400 bps with the PC The adaptation to the transmission speed of the phone line takes place automatically as well if not set differently See chapter8 ATcommand set Here both modems try to achieve the highest speed at the phone line togetherat connection set up Possible speeds at the phone line data transmisson up to four times as much by data compression DC 56k 300 to 56 000 Possible speeds at the phone line for fax transmission 2 300 2 400 4 800 7 200 9 600 and 14 400 bps The baudrate to the PC is for fax transmissions always 19 200 bps 4 10 2 Data Buffering for Serial Data Transmission The modem provides fast send and receive intermediate memory so called buffers in order to match the modem to the PC s processing speed It is possible to deactivate this data buffering with the AT N1 command and revert to direct mode When working with buffers handshaking hasto be used because otherwise a overflow of the modem buffer may occur which leads to data transmission failures 4 10 3 Direct Mode In this mode eleven bits are sent They consist of eight data bits a parity bit a start bit and a stop bit Direct mode is activated by the command AT N1 The modem has no influence in direct mode on the
52. of the S registers The registers concemed are marked with a in the description of the S registers 4 1 1 Factory Settings With the factory setting you are able to achieve a defined initial state of the modem From this basis you can adapt the modem according to your requirements If the modem is completely misadjusted some time loading the factory settings enables you to restore a ready to run state without any problems The factory settings of your modem type can be displayed in your terminal program with the AT command ATs amp rsV Here is the example of a type 56k at amp v ACTIVE PROFILE BO E1 11 1 1 00 T V1 WO YO amp C1 amp D2 amp GO amp JO amp K3 amp Q5 amp R1 850 amp T5 amp XO amp YO 500 000 501 000 502 043 503 013 504 010 505 008 506 003 507 060 508 002 509 006 510 020 511 095 512 050 518 000 525 005 526 001 536 007 537 000 538 020 546 138 548 007 595 047 STORED PROFILE 0 BO E1 11 1 1 00 T V1 WO X4 YO 1 amp D2 amp GO amp JO amp K3 amp Q5 amp R1 amp SO amp T5 amp XO 500 000 502 043 506 003 S07 060 4 808 002 509 006 510 020 511 095 512 050 518 000 536 007 537 000 540 104 541 195 546 138 595 047 STORED PROFILE 1 BO E1 11 1 1 00 T V1 WO X4 YO amp C1 amp D2 amp GO amp JO amp K3 amp Q5 amp R1 amp SO amp T5 amp XO Functions 9 500 000 502 043 S06 003 507 060 508 002 509 006 510 020 511 095 512 050 518 000 536 007 537 000 540 168 541 195 546 138 595 000 TELEP
53. rved The modem tries to set up an MNP connection nomal mode connection is made if this fa ils Bit 3 5 Bit 7 1 call answer unlocked 0 call answer locked S38 Delay Before Forced Hang up Maximum time in seconds that remains for the buffers to erase theirdata afterthe command to hang up hasbeen received Only valid for emor corrected links S39 PC Flow ControlModem Selection of the data flow control between PC and modem S39 0 No flow control AT amp KO 3923 RIS CTS flow control AT amp K3 3924 XON XOFF flow control AT amp K4 3925 Transparent XON flow control AT amp K5 3926 RIS CTSand XON XOFF flow control 48 OperatorsManual S41 546 General Bitmapped Options Status Bit Signification Bit 0 V 42 to MNP 10 MNP 10 Extended Service conversion 0 No V 42 MNP 10 0 1 V42to MNP10 AT K1 Powerlevel Power Level Adjustment for Adjustment MNP10 Cellular MNP 10 for 56k version reserved 0 No power adj AT MO Power adjustm AT M1 Bit 2 MNP speed MNP link negotiation speed for 56k version reserved 0 highest speed AT HO 1 1 200 bps AT H1 Break behavior 2 ndling like AT KO like AT K1 like AT K2 like AT K3 like ATNKA like ATNK5 Bit 6 7 MNP block size MNP Block Size 0 64 characters 1 128 characters 2 192 characters 3 256 characters General Bitmapped Options Status Bit Signification Select compression type Compressio
54. sequence The modem goes into input mode without hanging up AT amp D2 A DIR On Off change causes the modem to hang up Automatic pick up isnot possible AT amp D3 A DIR On Off change causes the modem to execute a reset as if an AT amp Y Command had been given A preceding AT amp Y command decides whether one of the two configurations 1 or2 should be loaded ATE Echo command input This command switches on or off the repeat display of commands that the modem carries out in response to commandsgenerated by the PC ATEO Echo off ATE1 Echo on AT The modem executes the retrain process when a transmission problem occurs After three unsuccessful retrain attempts the modem hangs up AT EO Retrain disabled 1 Retrain enabled 2 Fall back fall forward enabled AT E3 Fast fall back fall forward Not supported by all modem models AT E End remote control The command AT E command finishesthe remote control ATCommands 27 Command Description AT Fn Select the transmission speed at the serial interface The speed can be preselected with this command But this does not switch off the automatic detection As soon as an AT is detected the serial interface changesto the detected speed and protocol If no AT issent the selected speed is kept until a hardware reset If the selected speed isto be kept beyond this it hasto be stored with AT amp W Attention The register S23 is not chan
55. tart the flash loading function ATA Answer mode A Repeat last command Select maximum MNP block size AT A Alarm triggering ATB Bell Send break to other modem Enable data compression Remote configuration password AT amp C DCD CT109 behavior ATD Dialing AT amp D 108 2 behavior ATE Command input echo AT E Automatic retrain AT E End the remote configuration AT amp F Load factory settings Data flow control between modems for 56k versions ATH Terminate connection AT H Negotiate speed of set up protocol MNP 10 ATI Identification AT amp K Select data flow control between PC and Modem Break control AT K Extended MNP functions MNP 10 ATL Speaker volume ATAL Display level of received signal ANL Select block or stream mode for MNP connection not for 56k versions Speaker control ATMS Select modulation type AT M Select remote terminal Select enor conection ATO Retum to online data mode ATP Password request ATQ Quiet control AT Q Fallback to V 22bisand V 22 ATCommands AT Q Display quality of phone connection AT amp R RTS CTS behavior ATR Switch remote control on off ATS Write read S register AT amp S DSR behavior ATT Switch on tone dialing ATU Select protocol of serial interface ATV Form of modem messages
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57. transmission format Data is transferred without buffering Functions 17 Data compression or error correction does not function in direct mode Only the disconnect sequence isrecognized by the modem preset 4 10 4 Hardware Data How Control with RTS CTS CT133 CT106 Hardware data flow control via the mode CTS RS232 cable CTS line If the input buffer of the modem exceedsa certain XOFF fill state the modem sets the CTS line to OFF This indicates the PC that he shall send no data anymore Note The CTS line is only served by the modem when the commands AT amp K Or AT amp R are executed accordingly After the modem has worked off the input buffer so far that it falls below a certain buffer XON fill state it sets the CTS line back to ON and indicatesthe PC that is ready to receive data again Hardware data flow control via the PC RTS RS232 cable q4 CTS line The PC sets the RTS line to OFF to request the modem to interrupt the data transmission Note It depends on the respective software of the PC whether the RTS CTS lines are served from the PC The PC sets the RTS line to ON to request data from the modem n depends on the setting of the modem with the commands AT amp K Or AT amp R whether the RTS CTS lines are served from the modem 18 OperatorsManual 4 10 5 Software Data How Control Wit The ASCII Control Characters XON And XOFF CHR 17 And CHR 19 Send Data
58. ts for alam S14 General Bit Mapped Options Status S17 Remote initial character ASCII S21 V 24 General Bit Mapped Options Status 522 Speaker Results Bit Mapped Options Status S25 Delay to DTR Off 0 01 s S26 RIS to CTS Delay 0 015 529 Flash Dial Modifier Time 10 ms S30 Disconnect Inactivity Timer 10s 531 General Bit Mapped Options Status 42 OperatorsManual Register Function Units stored in EEPROM with 532 Character ASCII 33 XOFF Character ASCII 536 Failure control 538 Delay Before Forced Hang up S 539 Flow Control Bit Mapped Options Status 540 General Bit Mapped Options Status 541 General Bit Mapped Options Status S46 Data Compression Control 548 V 42 Negotiation Control S86 Call Failure Reason Code S91 Send level S95 Result Code Messages Control These registers are stored to the EEPROM with the command AT amp W S Register 6 2 Note gagy 43 Description S Register Registers marked with are stored to the user settings with AT amp W Ringsto Auto Answer The number of call ring signals before the modem answers A value of S020 meansthat the modem will not answer SO can accepta value between 0 and 5 Ring Counter Counter for call rings 51 can only be read 51 resetsto zero when the modem is waiting fora call Escape C
59. y effective when the parallel connected telephone is picked up ora call comesin Repeat last comma nd The last command entered isrepeated Select maximum MNP block size Determine the maximum block size foran emor corrected MNP transmission ATNAO 64 characters AT A1 128 characters AT A2 192 characters AT A3 256 characters AT A Alarm triggering Triggers an alarm message SMS dispatch ATB CCITTor Bell ATBO Select CCITT modulation ATB1 Select Bell modulation ATCommands 23 Command Description Send breakto the remote modem On a link without eror correction reliable link the modem sendsa break signal to the remote modem The signal length is the parameter given times 1 10 seconds On a link with emor correction the modem sends a signal according to the active emorcorection protocol without consideration of any parameter given If no link is operational ora fax link isactive an error message is given AT B1 1 10 second break signal up to AT B9 9 10 second break signal Enable data compression Enable or disable a certain type of data compression The modem can only out data compression on an ermorcorrected link 0 No data compression enabled 1 Enable MNP5 data compression AT C2 Enable V 42bis data compression AT C3 Enable MNP5 and V 42bis data compression Remote Control Password With this command you can
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