1. Manuals
  2. Brands
  3. KE Manuals
  4. Modem
  5. LOGEM LGH 28.8D1
  6. Operation manual

KE LOGEM LGH 28.8D1 Operation Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Operation Manual
© Copyright 1997 ke Kommunikations-Elektronik GmbH & Co.
Technical Status 07/97
Changes may be made without further notice.
Editor:
ke Kommunikations-Elektronik GmbH & Co.
Kabelkamp 20
30179 Hannover/Germany
Phone:
++49 (511) 67 47 - 0
Fax:
++49 (511) 67 47 - 376
Internet:
http://www.ke-online.de
T-Online:
*ke #
Ordering Number: 371 977 46
V.34 - Modems
®
LOGEM
®
LOGEM
LGM 28.8D1
®
LOGEM
LGH 28.8D1
928

Advertisement

Table of Contents
loading

Summary of Contents for KE LOGEM LGH 28.8D1

  • Page 1 ® LOGEM ® LOGEM LGM 28.8D1 ® LOGEM LGH 28.8D1 © Copyright 1997 ke Kommunikations-Elektronik GmbH & Co. Technical Status 07/97 Changes may be made without further notice. Editor: ke Kommunikations-Elektronik GmbH & Co. Kabelkamp 20 30179 Hannover/Germany Phone: ++49 (511) 67 47 - 0...
  • Page 2 Attention: ® The versions: LOGEM (standalone version) ® LOGEM LGM 628.8D1 (rackmounted version) ® LOGEM LGH 28.8D1 (top rail version) these versions are not specified with their product name at some parts in the manual due to practical reasons. Specific features of the different versions are described separately in the operation manual.
  • Page 3 Contents Modem Description ........... 15 LOGEM ® A/O Da/Te Chapter 1 Switches Description......... 33 Chapter 2 AT Commands ........... 67 Chapter 3 Register Allocation .......... 105 Chapter 4 V.25 V.25bis Commands ......... 125 Chapter 5 Dial Backup Features ........135 Chapter 6 Applications .............

  • Page 4: Table Of Contents

    Contents Contents General ....................9 Safety Instructions .................. 9 About The Manual ................11 Modem Description ..............15 Transmission Procedures ............ 16 AT Commands ..............17 Compatibility ................ 17 V.25bis Commands .............. 17 Automatic Dialing ..............17 Data Compression and Data Protection ......17 Password Protection and Callback ........
  • Page 5 Contents 2.2.3 LOGEM ® 928/LGM 28.8D1 Synchronous V.25bis .... 48 2.2.4 LOGEM ® 928/LGM 28.8D1 Asynchronous (Software mode/AT and V.25bis) ......... 50 Software Mode Switches Description ......... 52 2.3.1 Loading of Basic Settings 0, 1 or 8 ........52 2.3.2 Basic Setting 0 ..............53 2.3.3 Basic Setting 1 ..............53...
  • Page 6 Contents V.25bis Commands ..............125 Reports ................125 Dialing and Telephone Functions ........127 Modem Configuration with V.25bis ........131 5.3.1 DNL Command for LGM 1200H1 Operation ....132 5.3.2 DNL Command for LGM 2400D2 Operation ....132 Dial Backup Features ............135 Function of the Dial Backup Board ........
  • Page 7 Contents Appendix B3 Telephone Access Cable RJ12/TAE 6N ......178 Appendix B4 Telephone Access Cable FKS8/TAE 6N ......179 Appendix C1 Data Interface LGM 28.8D1 ..........180 Appendix C2 Interfaces LGM 28.8D1 .............181 Appendix C3 V.24 Interface Allocations ..........182 Appendix C4 Asynchronous Standard Connection Connection ....
  • Page 8 Contents Operation Manual V.34 - Modems, Version 07/97...

  • Page 9: General

    General General Safety Instructions Please read the following safety instructions carefully. They are ment for your own safety and for faultless function of your devices: • Electronical devices are sensitive for electrostatical charges. Deflect any electrostatical charges before touching the board with your hands or tools.
  • Page 10 General Operation Manual V.34 - Modems, Version 07/97...

  • Page 11: About The Manual

    General About The Manual This manual presents the features of the modems concerning all functions and meaning of the DIP switches as well as the operational elements and the command language. Operation Manual V.34 - Modems, Version 07/97...
  • Page 12 General Operation Manual V.34 - Modems, Version 07/97...
  • Page 13 Modem Description Modem Description ......15 Transmission Procedures ........... 16 LOGEM ® A/O Da/Te AT Commands ............17 Chapter 1 Compatibility .............. 17 V.25bis Commands ............ 17 Automatic Dialing ............17 Data Compression and Data Protection ....17 Password Protection and Callback ......18 Remote Configuration ..........
  • Page 14 Modem Description LOGEM ® A/O Da/Te Chapter 1 Operation Manual V.34 - Modems, Version 07/97...

  • Page 15: Modem Description

    Modem Description Modem Description The LOGEM ® 928 is a high speed standalone modem for duplex operation that supports all conventional modulation procedures. The LOGEM ® LOGEM ® A/O Da/Te 28.8D1 has identical features and comes as a rackmounted version while Chapter 1 ®...

  • Page 16: Transmission Procedures

    Modem Description product line even allow for reconfiguration during an existing connection. Three operation modes are available for different modem applications. During software mode all modem configurations are performed using AT LOGEM ® A/O Da/Te or V.25bis commands. AT commands should be prefered generally as Chapter 1 V.25bis commands do not allow to set any registers.

  • Page 17: At Commands

    Modem Description AT Commands The AT command set is an international standard developed by the US modem manufacturer Hayes. During command mode any modem LOGEM ® A/O Da/Te commands or modem reports are transfered asynchronously to the data Chapter 1 terminal equipment (DTE).

  • Page 18: Password Protection And Callback

    Modem Description Password Protection and Callback The modems provide password protection with four operation modes LOGEM ® A/O Da/Te that may be combined freely (with/without callback and released callback/ Chapter 1 forced callback). Max. 20 callback numbers are protected individually with a password.

  • Page 19: Front Panel Logem ® 928

    Modem Description ® 1.12 Front Panel LOGEM LOGEM ® A/O Da/Te Chapter 1 LOGEM ® Da/Te Element Description S1 (LED) State of interface line S1 DTE is operational M2 (LED) State of interface line M2 DCE ready to transmit D1 (LED) State of interface line D1 OFF: no DTE connected Green:DTE is active...

  • Page 20: Backpanel Logem ® 928

    Modem Description ® 1.13 Backpanel LOGEM LOGEM ® A/O Da/Te Chapter 1 Element Description telephone access jack (RJ12) for dial line and 2 wire leased line RJ12 jack for 2/4 wire leased line via DBU board (optional) 25pole sub D jack (acc.to ITU-T V.24/V.28) power supply connector (2pole) for power supply cable of the external adapter Operation Manual V.34 - Modems, Version 07/97...

  • Page 21: Front Panel Logem ® Lgm 28.8D1

    Modem Description 1.14 Front Panel LOGEM ® LGM 28.8D1 LOGEM ® A/O Da/Te Chapter 1 LOGEM ® 28.8D1 Da/Te SERV. Element Description Da/Te (button) data/test button SERV. (conn.) earphone connector ANS (LED) indicates channel allocation Blinks:modem occupies the line PM1 (LED) State of interface line PM1 test activated S1 (LED)

  • Page 22: Side View Logem ® Lgm 28.8D1

    Modem Description ® 1.15 Side View LOGEM LGM 28.8D1 LOGEM ® A/O Da/Te Chapter 1 Element Description S1 (switch) DIP switches SET 1/1 ... SET 1/10 S2 (switch) DIP switches SET 2/1 ...SET 2/4 S3 (switch) DIP switches SET 3/1 ... SET 3/6 (bottom) Operation Manual V.34 - Modems, Version 07/97...

  • Page 23: Front Panel Logem ® Lgh 28.8D1

    Modem Description ® 1.16 Front Panel LOGEM LGH 28.8D1 LOGEM ® A/O Da/Te Chapter 1 Element Description D1 (LED) State of interface line D1/TxD receives data from DTE S1 (LED) State of interface line S1/DTR Yellow: DTE operational LB (LED) active during line access D2 (LED) State of interface line D2/RxD...

  • Page 24: Top Side Logem Lgh 28.8D1

    Modem Description ® 1.17 Top Side LOGEM LGH 28.8D1 LOGEM ® A/O Da/Te Chapter 1 Operation Manual V.34 - Modems, Version 07/97...

  • Page 25: Connection Example

    Modem Description 1.18 Connection Example LOGEM ® A/O Da/Te Chapter 1 LOGEM ® A/O Da/Te TAE 6 NF Datenendeinrichtung Operation Manual V.34 - Modems, Version 07/97...

  • Page 26: Installation And Commissioning (Standalone Versions)

    Modem Description 1.19 Installation and Commissioning (Standalone Versions) ® The items listed below are necessary for commissioning of the LOGEM 928: LOGEM ® A/O Da/Te Chapter 1 • a telephone access • a telephone access jack TAE 6, coding N •...

  • Page 27: Installation And Commissioning (Rackmounted Versions)

    Modem Description 1.20 Installation and Commissioning (Rackmounted Versions) The items listed below are necessary for commissioning of the LOGEM ® LGM 28.8D1: LOGEM ® A/O Da/Te Chapter 1 • a telephone access • a telephone access jack TAE 6, coding N •...

  • Page 28: Installation And Commissioning (Top Rail Versions)

    Modem Description 1.21 Installation and Commissioning (Top Rail Versions) ® The items listed below are necessary for commissioning of the LOGEM LGH 28.8D1: LOGEM ® A/O Da/Te Chapter 1 • a telephone access • a telephone access jack TAE 6, coding N •...

  • Page 29: Loading Of Basic Settings

    Modem Description 1.22 Loading of Basic Settings If you have any doubts concerning modem configuration during AT mode and the modem seems not to accept any commands coming from the LOGEM ® A/O Da/Te DTE you can restore the basic setting without a terminal just by pressing Chapter 1 the button Da/Te during modem startup.
  • Page 30 Modem Description LOGEM ® A/O Da/Te Chapter 1 Operation Manual V.34 - Modems, Version 07/97...
  • Page 31 Switches Description Switches Description ......33 Table Software/Compatible/Mixed Mode ....36 2.1.1 Compatible Mode Switches ........37 2.1.1 LGM 1200H1 Operation ..........38 2.1.2 LGM 2400D2 Operation ..........40 2.2.1 LOGEM ® 914/LGM 14.4D1 Synchronous/V.25bis ... 44 Chapter 2 2.2.2 LOGEM ®...
  • Page 32 Switches Description Chapter 2 Operation Manual V.34- Modems, Version 07/97...

  • Page 33: Switches Description

    Switches Description Switches Description The LOGEM ® 928 and the LOGEM ® LGH 28.8D1 feature 20 DIP switches in two blocks with 10 switches each (S1.1 ... S1.10 and S2.1 ... S2.10). ® The LOGEM LGM 28.8D1 features 20 DIP switches in three blocks with 10, 4 and 6 switches (S1.1 ...
  • Page 34 Switches Description The modems feature special settings for three different operation modes: Compatible Mode If you have selected one of the compatible mode settings the switches S1.1 ... S2.4 correspond to the switches of the modem to be emulated. If you have selected the modem type to be emulated the setting of all other DIP switches can be kept.
  • Page 35 Switches Description Attention: If you have selected the operation mode leased line M1+ the command phase is deactivated automatically (ref. to AT command AT&B) as well as the escape character “+“. The interface line M2/CTS is not active during the offline phase. Further internal configurations suppress the character echo and the modem reports.

  • Page 36: Table Software/Compatible/Mixed Mode

    Switches Description Table Software/Compatible/Mixed Mode compatible mixed software mode mode mode V.25bis sync. V.25bis async. Chapter 2 AT commands (async.) define own user setting password protection direct call leased line async. (no data prot. protocol) leased line async. (data prot. protocol) leased line sync.

  • Page 37: 2.1.1 Compatible Mode Switches

    Switches Description 2.1.1 Compatible Mode Switches If you have selected one of the compatible mode settings (DIP switches S2.6 ..S2.10 or S3.2 ... S3.6) the switches S1.1 ... S2.4 correspond to the switches of the selected modem. Thus the setting of the first14 DIP switches of the modem to emulated can be kept.

  • Page 38: 2.1.1 Lgm 1200H1 Operation

    Switches Description 2.1.1 LGM 1200H1 Operation S1.1 S1.2 S1.3 transmission rate * S1.1 S1.2 S1.3 1200 bit/s hx, V.23, asyn. 1200 bit/s hx, V.23 with clock + SYNC change 1200 bit/s hx, no SYNC change idle Chapter 2 idle 300 bit/s dx, V.21 constant carrier 300 bit/s, S2 (RTS) controlled 300 bit/s, S2-M2 (RTS-CTS) simulation S1.4...
  • Page 39 Switches Description S1.10 channel allocation (only for V.21) S1.10 transmit channel allocation B, receive channel allocation A transmit channel allocation A, receive channel allocation B S2.1 hx: carrier delay S2.1 at V.21: channel alloc.* S2.1 S2.1 ~ 22 ms autom. Chapter 2 V.23 ~30 ms;...

  • Page 40: 2.1.2 Lgm 2400D2 Operation

    Switches Description 2.1.2 LGM 2400D2 Operation S1.1 transmission procedure S1.1 asynchronous synchronous S1.2 S1.3 format V.25bis sync. S1.2 S1.3 data format. asyn. Chapter 2 S1.2 S1.3 S1.2 S1.3 bitoriented ASCII OFF OFF 10 bit/character byteoriented ASCII 9 bit/character bitoriented EBCDIC OFF ON 8 bit/character byteoriented EDCDIC ON 11 bit/character...
  • Page 41 Switches Description S2.1 leased line channel alloc. at S2.2 dialing procedure S2.1 operation without answer tone S2.2 calling mode pulse answer mode tone S2.3 V.25bis S2.4 S2/CTS control S2.3 comm. echo S2.4 no echo perm. ON Chapter 2 echo from DTE S2.5 autom.
  • Page 42 Switches Description Chapter 2 Operation Manual V.34- Modems, Version 07/97...
  • Page 43 Switches Description Mixed Mode Switches Some parameters are selected using DIP switches during mixed mode operation. Further parameters can be adjusted with AT commands. To avoid any collision between AT commands and DIP switches the commands listed below are blocked during mixed mode operation. During synchronous mode operation AT commands are not available as it employs generally V.25bis commands only.

  • Page 44: Logem ® 914/Lgm 14.4D1 Synchronous/V.25Bis

    Switches Description 2.2.1 LOGEM ® 914/LGM 14.4D1 Synchronous/V.25bis S1.1 S1.2 S1.3 transmission rate (bit/s) S1.1 S1.2 S1.3 14400 bit/s/auto (V.32bis, V.32, V22bis, V.22) 14400 bit/s/V.32bis 12000 bit/s/V.32bis 9600 bit/s/V.32 Chapter 2 7200 bit/s/V.32 4800 bit/s/V.32 2400 bit/s/V.22bis 1200 bit/s/V.22 S1.4 S1.5 S1.6 operation mode...
  • Page 45 Switches Description leased line operation (M1+, S1.1): S1.7 S1.8 S1.9 leased line operation mode S1.7 S1.8 S1.9 2 wire via dial line interface 2 wire via dial backup board* 4 wire via dial backup board* S1.10 channel allocation for leased line operation S1.10 Chapter 2 answer...

  • Page 46: (Software Mode/At And V.25Bis)

    Switches Description 2.2.2 LOGEM ® 914/LGM 14.4D1 Asynchronous (software mode/AT and V.25bis) S1.1 S1.2 S1.3 transmission rate (bit/s) S1.1 S1.2 S1.3 14400 bit/s/auto (V.32bis, V.32, V22bis, V.22) 14400 bit/s/V.32bis 12000 bit/s/V.32bis Chapter 2 9600 bit/s/V.32 7200 bit/s/V.32 4800 bit/s/V.32 2400 bit/s/V.22bis 1200 bit/s/V.22 S1.4 S1.5...
  • Page 47 Switches Description S2.1 S.2.2 DTE rate for normal and reliable mode S2.1 S2.2 autobaud for AT commands (default: 9600 bps) 9600 bit/s 19200 bit/s 38400 bit/s S2.3 rate change ** Chapter 2 S2.3 S2.4 hx simulation S3.1 S2.5 dial line S2.5 leased line S3.1...

  • Page 48: Logem ® 928/Lgm 28.8D1 Synchronous V.25Bis

    Switches Description 2.2.3 LOGEM ® 928/LGM 28.8D1 Synchronous V.25bis S1.1 S1.2 S1.3 transmission rate (bit/s) S1.1 S1.2 S1.3 28800 bit/s/auto (V.34bis,V32bis, V.32, V22bis, V.22) 28800 bit/s/V.34 26400 bit/s/V.34 24000 bit/s/V.34 Chapter 2 21600 bit/s/V.34 19200 bit/s/V.34 16800 bit/s/V.34 14400 bit/s/V.34 S1.4 S1.5 S1.6...
  • Page 49 Switches Description leased line operation (M1+, S1.1): S1.7 S1.8 S1.9 leased line operation mode S1.7 S1.8 S1.9 2 wire via dial line interface 2 wire via dial backup board** 4 wire vial dial backup board** S1.10 channel allocation for leased line operation Chapter 2 S1.10 answer...

  • Page 50: (Software Mode/At And V.25Bis)

    Switches Description 2.2.4 LOGEM ® 928/LGM 28.8D1 Asynchronous (Software mode/AT and V.25bis) S1.1 S1.2 S1.3 transmission rate (bit/s) S1.1 S1.2 S1.3 28800 bit/s/auto (V.34bis,V32bis, V.32, V22bis, V.22) 28800 bit/s/V.34 26400 bit/s/V.34 Chapter 2 24000 bit/s/V.34 21600 bit/s/V.34 19200 bit/s/V.34 16800 bit/s/V.34 14400 bit/s/V.34 S1.4 S1.5...
  • Page 51 Switches Description S2.1 S.2.2 DTE rate for normal and reliable mode* S2.1 S2.2 autobaud for AT commands (default: 38400 bps) 38400 bit/s 57600 bit/s 115200 bit/s S2.3 rate change** Chapter 2 S2.3 S2.4 hx simulation S3.1 S2.5 dial line S2.5 leased line S3.1 dialing procedure...

  • Page 52: Software Mode Switches Description

    Switches Description Software Mode Switches Description Any configurations during software mode are performed using AT commands. The generated user setting may be stored permanently in the EEPROM with the command AT&W(n) (n=0...2). The modems feature three different predefined configurations for the software mode that are stored in the ROM.

  • Page 53: Basic Setting 0

    Switches Description 2.3.2 Basic Setting 0 In delivery state the modems come with basic setting 0. All DIP switches are in OFF position. Connection: dial line Operation mode: automatical detection of modulation (V.22 ... V.34) DTE interface: autom. detection of transmission rate at 8 data Chapter 2 bits, no parity Data protection:...

  • Page 54: Basic Setting 8 (User Setting 2)

    Switches Description 2.3.4 Basic Setting 8 (User Setting 2) Here DIP switch S2.9 (S3.5) is ON and all other switches are in position OFF to select basic setting 8. This setting may be overwritten with AT&W2. This allows for generating of an individual default setting that can be recalled using the DIP switches.

  • Page 55: Switches Table Basic Setting 0 (Software Mode)

    Switches Description Switches Table Basic Setting 0 (Software Mode) Switches S2.6 S2.7 S2.8 S2.9 S2.10 S3.2 S3.3 S3.4 S3.5 S3.6 autom. detection of modulation procedure, V.42bis, btx operation Chapter 2 with transmission rates > 2400 bit/s possible, AT commands, autobaud, asynchronous F255 E1 L1 M1 Q0 X4 V1 P \Q2 \G0 \A1 \C3 \L0 \N3 \X0 \K3 \B3 %C1 %E1 %M0 %R0 &L0 &I0 &X0 &G0 &M0 &C2 &D2 &H0 &R1 &S1 &T5 S00=001 S01=000 S02=043 S03=013 S04=010 S05=008 S07=100...

  • Page 56: Switches Table Basic Setting 1

    Switches Description 2.4.1 Switches Table Basic Setting 1 Switches S2.6 S2.7 S2.8 S2.9 S2.10 S3.2 S3.3 S3.4 S3.5 S3.6 V.22bis, btx, AT commands, 2400 bit/s, asynchronous Chapter 2 F3 E1 L1 M1 Q0 X4 V1 P \Q2 \G0 \A1 \C0 \L0 \N1 \X0 \K0 \B3 %C1 %E1 %M0 %R0 &L0 &I0 &X0 &G0 &M0 &C2 &D2 &R1 &H0 &S0 &T5 S00=000 S01=000 S02=043 S03=013 S04=010 S05=008 S07=100 S08=002 S10=004 S12=045 S20=255 S26=004 S28=000 S37=000...

  • Page 57: Switches Table Basic Setting 8 (User Setting 2)

    Switches Description 2.4.2 Switches Table Basic Setting 8 (User Setting 2) Switches S2.6 S2.7 S2.8 S2.9 S2.10 S3.2 S3.3 S3.4 S3.5 S3.6 autom. detection of modulation procedure, V.42bis, btx operation with transmission rates > 2400 bit/s possible, AT commands, autobaud, Chapter 2 asynchronous F255 E1 L1 Q0 X4 V1 P \Q2 \G0 \A1 \C3 \L0 \N3 \X0 \K3 \B3 %C1 %E1...

  • Page 58: Transmit And Receive Levels (Standalone Versions)

    Switches Description Transmit and Receive Levels (Standalone Versions) Transmit and receive levels may be adjusted if necessary using jumpers at the positions ST1 and ST2. Attention! Any transmit level changes are not permitted within the network of the German Telekom! Chapter 2 Sendepegel Pegel...

  • Page 59: Board Of The Logem 928 (Standalone Version)

    Switches Description ® Board of the LOGEM 928 (Standalone Version) Chapter 2 The switches ST1 and ST2 are accessible from the bottom of the devices. If changes at the jumpers are necessary the modem has to be opened at the marked spots using a screwdriver. 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 910 Operation Manual V.34- Modems, Version 07/97...

  • Page 60: Transmit And Receive Level (Rackmounted Version)

    Switches Description Transmit and Receive level (Rackmounted Version) Transmit and receive levels may be adjusted if necessary using jumpers at the positions ST1 and ST2. Attention! Any transmit level changes are not permitted within the network of the German Telekom! Chapter 2 transmit levels level...

  • Page 61: Board Of The Lgm 28.8D1

    Switches Description Board of the LGM 28.8D1 Chapter 2 Operation Manual V.34- Modems, Version 07/97...

  • Page 62: Transmit And Receive Level (Top Rail Version)

    Switches Description Transmit And Receive Level (Top Rail Version) Transmit and receive levels may be adjusted if necessary using jumpers at the positions ST1 and ST2. Attention! Any transmit level changes are not permitted within the network of the German Telekom! Chapter 2 transmit levels levels...

  • Page 63: Board Of The Lgh 28.8D1

    Switches Description 2.10 Board of the LGH 28.8D1 Basiskarte ....Chapter 2 ... . Steuerkarte .

  • Page 64: Country Setting For Lgh 28.8D1

    Switches Description 2.11 Country Setting for LGH 28.8D1 Due to different network accesses the LGH 28.8D1 may be set to country specific adjustments using jumpers. In delivery state the jumpers are set for operation in the network of the Federal Republic of Germany. basic control Chapter 2...
  • Page 65 AT Commands AT Commands ........67 General ............... 67 Command Description ..........68 Telephone and Dialing Features ......... 69 3.3.1 Test Loops ..............77 3.3.2 Storing and Displaying of Telephone Numbers ..78 Report Codes ............. 79 Changing of Register Contents ........83 Activation of Control and Report Lines ......
  • Page 66 AT Commands Chapter 3 Operation Manual V.34 - Modems, Version 07/97...

  • Page 67: At Commands

    AT Commands AT Commands General The AT command set is an international standard developed by the US modem manufacturer Hayes (Hayes standard). All commands (AT commands) of the Hayes standard begin with an AT (ATTENTION). The AT command set is used only for asynchronous serial mode operation. You must run a terminal software on your computer to send AT modem commands.

  • Page 68: Command Description

    AT Commands Command Description Repeat Last Command Line The modem repeats the last command line that was typed. The command A/ is not terminated with a carriage return (CR). The command is very useful whenever a call was not successful as the subscriber was ocupied.

  • Page 69: Telephone And Dialing Features

    Dial Up with Short Name The modem dials the dial character sequence xxx that is registered in the number storage. Example: AT&Z5=0511 xxx / ke-e (CR) ATD/ke-e (CR) The modem dials the telephone number 0511 xxx. Operation Manual V.34 - Modems, Version 07/97...
  • Page 70 AT Commands ATD xxx Dialing Command The command ATD is utilized to transfer a dialing command to the modems. The dial character sequence xxx is dialed automatically. The line editor accepts the parameters listed below as dialing modifiers: parameter description 0 ...
  • Page 71 The modem dials the dial sequence (XXX) that was saved in the number storage n (ref. to command AT&Z). Example: AT&Z1= 0511 67 47 390/KE-E (CR) ATDS = 1 or ATD/KE-E (CR) Chapter 3 The modem dials the stored number automatically. The “/“ (slash) is only necessary if further commands are being typed.
  • Page 72 AT Commands ATF(n) Transmission Procedure The command ATF(n) is utilized to set the transmission procedure of the modems on the telephone line. The table printed below can be requested with the command ATF??. command description valid switches table for ATSET(n)=x command ATF 0 as ATF255 ATF 1...
  • Page 73 AT Commands Disconnect An existing data connection is terminated (on hook function). ATI(n) Identification This command is employed to check for perfect connection between DTE and modem. command parameter/default description ATI(n) 0...2 modem identification software version Chapter 3 V.42bis/MNP software version modem revision level Switching to Transparent Mode During an existing connection the modems switch back from command...
  • Page 74 AT Commands Pulse Dialing For dial up in public networks the modems must be set to pulse dialing normally. After typing the command ATP all dialing attempts are performed using pulse dialing procedures. Tone Dialing For dial up at PABX systems and digital exchanges operating with multi- frequency dialing the modems must be set to tone dialing.
  • Page 75 AT Commands AT&L(n) Line Selection The command is utilized for modem configuration for switched and leased line operation. command parameter/default description AT&L(n) 0...15 / 0 line selection dial line 2 wire leased line (initiate with ATA or 2 wire leased line, originator (master) 2 wire leased line, answerer (slave) Chapter 3 4 wire leased line, originator (master)
  • Page 76 AT Commands AT&M(n) Selection of Transparent Operation Mode command parameter/default description AT&M(n) 0, 1 / 0 asyn./syn. mode asynchronous operation asynchronous command mode, synchronous transparent mode AT%D(n) Temporarily Blocked Numbers The modems can block telephone numbers temporarily for any dial attempts (command ATD xxx).

  • Page 77: Test Loops

    AT Commands 3.3.1 Test Loops AT&T(n) Test Loops The command AT&T comes with different independent groups of settings. The settings for the different groups have to be typed consecutively. The commands AT&T0 and AT&T1 are processed immediately. With the command AT&T? you can display the current setting and other possible adjustments.

  • Page 78: 3.3.2 Storing And Displaying Of Telephone Numbers

    AT&Z(n)=(x) Store Telephone Number Chapter 3 With the command AT&Z you can store max. 20 numbers (n = 0...19). Example: AT&Z1 = 0511\67 47 390/KE-E (CR) The parameters listed below are applicable with the ATD command: parameter description no parameter data button function “call“...

  • Page 79: Report Codes

    AT Commands Report Codes Report codes are informations that the modems transfer to the DTE e.g. invalid commands are acknowledged with an ERROR report. ATQ(n) Result Codes ON/OFF Display of report codes can be selected using the ATQ command. command parameter/default description ATQ(n)
  • Page 80 AT Commands AT&I(n) CONNECT Reports The modems issue a CONNECT report after successful dialup. As an addition the transmission rate can be displayed with extended result codes. With the command ATI(n) you can select the transmisson rate to be displayed. command parameter/default description...
  • Page 81 AT Commands Report Codes Table: report code text description correct input CONNECT data connection RING incoming call NO CARRIER no/weak receive signal ERROR wrong input CONNECT 1200 data connection 1200 bit/s NO DIALTONE no dial tone BUSY busy tone received NO ANSWER no answer tone received Chapter 3...
  • Page 82 AT Commands report code text description CONNECT 300/COMP data connection 300 bit/s CONNECT 1200/COMP data connection 1200 bit/s CONNECT 2400/COMP data connection 2400 bit/s CONNECT 9600/COMP data connection 9600 bit/s CONNECT 4800/COMP data connection 4800 bit/s CONNECT 7200/COMP data connection 7200 bit/s CONNECT 12000/COMP data connection 12000 bit/s CONNECT 14400/COMP...

  • Page 83: Changing Of Register Contents

    AT Commands Changing of Register Contents ATS(n) = (x) Set Registers The modem registers listed below may be changed: reg. description values default count of rings ESCAPE character 0-255 43 (+) carriage return (CR) 0-255 line feed (LF) 0-255 backspace 0-255 Chapter 3 connect timeout...
  • Page 84 AT Commands The modems store the register contents in the RAM. These register settings are not available after modem deactivation. For further utilization of these register settings they must be stored in the modems (nonvolatile) EEPROM using the command AT&W(n)! The settings can be activated later with the ATZ(n) command or by deactivating and restarting the modem.
  • Page 85 AT Commands AT&Y(n) Load User Setting With the AT&A(n) command you select the user setting to load from the EEPROM after POWER ON. command parameter/default description AT&Y(n) 0...2 / 2 load user setting load user setting 0 load user setting 1 load user setting 2 (identical to basic setting 8) Chapter 3...

  • Page 86: Activation Of Control And Report Lines

    AT Commands AT\S Display Parameters The command AT\S displays the current modem settings. Example: AT\S Konfiguration: F Betriebsart ....Auto \X XON/XOFF-Weitergabe . 1 &T Teststellungen ....5 L Lautstärke ..... 1 %C Kompressions-Mode ..1 &X Taktvariante ....0 M Lautsprecher ....
  • Page 87 AT Commands AT&D(n) S1 Option The command controls the operation of the interface line S1/108 (DTR). command parameter/default description AT&D(n) 0...6 / 2 S1 option S1/108 is ignored by the modems commands are received at inactive S1/108. Incoming calls are not accepted.
  • Page 88 AT Commands AT&R(n) M2 Option The command controls the interface line M2/106 if synchronous operation was selected with AT&M1. command parameter/default description AT&R(n) 0...2 / 1 M2 option the interface line M2/106 follows S2/105with a delay to be specified in register S26 M2/106 is constantly ON M2 is only active during data trans-...

  • Page 89: Data Protection Protocols

    AT Commands Data Protection Protocols AT\A(n) MNP Block Length The max. number of characters can be set when implementing the Microcom Networking Protocol (MNP). Due to compatibility reasons the parameters 2 and 3 are acknowledged with an OK. Internally the parameters are set to “1“ generally. command parameter/default description...
  • Page 90 AT Commands AT\N(n) Error Correction Procedure command parameter/default description AT\N(n) 0...5 / 3 error correction procedure normal mode, no error correction, V.42 or MNP4 deactivated, data compression with V.42bis or MNP5 is not possible direct mode*, V.24 interface rate corresponds to modem transmission rate, no error correction, V.42 or MNP4 deactivated, data compression with Chapter 3...
  • Page 91 AT Commands AT\O Initiate MNP The modems initiate reliable mode from normal mode. Then the modems send two reliable link sequences. If the modem does not respond after 20 secs. the data connection remains as it was before. If the remote modem accepts the request the current connection is displayed with a CONNECTxxx report.

  • Page 92: Break Handling

    AT Commands AT%C(n) Select Data Compression Select an error protocol with or without data compression. command parameter/default description AT%C(n) 0...3 / 1 select data compression no data compression data compression active (V.42bis or MNP5) V.42bis for transmit data only V.42bis for receive data only Chapter 3 BREAK Handling AT\B(n)

  • Page 93: Handshake

    AT Commands AT\K(n) BREAK Handling The command controls the BREAK signal handling and is not applicable during direct mode. command parameter/default description AT\K(n) 0...3 / 3 BREAK handling ignore BREAK erase data buffer, transfer BREAK transfer BREAK immediately transfer BREAK with transmit/ receive data Chapter 3 Handshake...
  • Page 94 AT Commands AT\X(n) XON/XOFF Transfer The AT\X command controls the transfer of XON/XOFF characters in connection with the commands AT\G and AT\Q. If the command AT\G1 is active the devices perform modem to modem flow control. command parameter/default description AT\X(n) 0, 1 / 0 XON/XOFF transfer no XON/XOFF transfer...

  • Page 95: Module Functions

    AT Commands AT&H Halfduplex Simulation A halfduplex simulation for duplex operation modes is defined acc. to ITU-T V.13. If the control line S2 is activated at the local modem the remote modem receives a control sequence. Then the remote modem activates the report line M5.

  • Page 96: Password Protection

    AT Commands ATSET? Inquire DIP Switches Setting The command is employed to inquire the modem settings adjusted with the DIP switches in compatible mode. After reading all 14 (or 18) para- meters the modems issue an ON or OFF. Example: ATSET? (CR) 3.10 Password Protection...
  • Page 97 AT Commands with forced callback user action modem reaction RETURN callback with number specified by password (AT&Z(n)) (number) RETURN callback with phone number • max. 20 callback numbers • protected alterations due to super password • hacker protection. Register S101 counts invalid password inputs. Passwords and callback numbers are stored in the 20 short dial registers Chapter 3 Z00 ...
  • Page 98 AT Commands Additional information operation mode A: The operation mode labeling is available with the software version 4.00. To guarantee for downward compatibility configuration is possible without a prefixed label as well. In this case the modems behave according to operation mode A.
  • Page 99 AT Commands The connection is being deestablished after typing the new calling number. Now the modem generates the dialing command ATD05116747590 and initiates the dialing procedure. The callback number defined in Z9 will not be altered by this procedure! The standard callback number should be stored in the short dial register for this reason! If the new callback number starts with a „...

  • Page 100: Remote Configuration

    AT Commands AT%MP=(x) Define Dial Prefix The command defines the dial prefix (for central office access) employed with PABX systems. This definition is only necessary for password protection with callback numbers to be freely defined. Example: AT%MP=T89W The parameters listed below are valid: parameter description pulse dialing...

  • Page 101: Loudspeaker

    AT Commands be saved with AT&W(n). The connection is terminated with an ATZ(n) command and the new configuration is loaded. If you do not type the ATZ(n) command the remote modem keeps the latest settings until the next POWER ON. Attention: As remote configuration is only applicable for reliable mode the commands ATF(n) (n= 4 or 5) and AT\N1...
  • Page 102 AT Commands Chapter 3 Operation Manual V.34 - Modems, Version 07/97...
  • Page 103 Register Description Register Allocation ......105 Modem Memory Locations ........105 Register Description ..........107 Chapter 4 Operation Manual V.34 - Modems, Version 07/97...
  • Page 104 Register Description Chapter 4 Operation Manual V.34 - Modems, Version 07/97...

  • Page 105: Register Allocation

    Register Description Register Allocation Modem Memory Locations The modems feature integrated data memories for data protection (e.g. configurations, phone numbers, individual labelling etc.). Read Only Memory The internal ROM of the modems is a read only memory containing the basic settings 0 ... 7. These data is being kept even after deactivation of the modems power supply and may not be altered.
  • Page 106 Register Description factory defaults basic settings 0…7 AT&F0 …7 Chapter 4 modem AT&W0 … 2 Einschalten: AT&F8 AT&Y0…2 ATZ0…2 user settings 0…1 EEPROM user settings basic setting 8 Operation Manual V.34 - Modems, Version 07/97...

  • Page 107: Register Description

    Register Description Register Description The modems feature a number of registers to store information and to manipulate the operation of the modem. To adapt the modem to individual applications you can change the default parameters using the command ATS(n)=xxx. With the command AT&W(n) register values may be saved permanently in the EEPROM.
  • Page 108 Register Description Number Of Rings The register specifies the number of rings for automatical answering. If the register is set to 0 the modems do not answer automatically. register values / default description 0...5 / 1 number of rings Count Of Rings The register counts the number of recognized rings.
  • Page 109 Register Description Backspace Backspace character setting for command mode application. register values / default description 0...255 / 8 (08hex) backspace Carrier Delay During dial up the modem waits for a carrier from the remote modem. The carrier delay can be set in register S7. The modem disconnects when the carrier delay time is exceeded.
  • Page 110 Register Description Break Sequence Guard Time The register defines the time (in ms) the modem has to wait before and after a break sequence to be able to detect the break sequence. A break sequence consists of three consecutive break characters to be specified in register S2.
  • Page 111 Register Description Inactivity Timeout The register specifies the period the modem waits for received data or data to be transmitted before disconnecting. If the register is set to 0 the modem does not disconnect. This register is not applicable for direct mode.
  • Page 112 Register Description Modulation and Transmission Procedures The content of register S50 correspond to the setting of AT command ATF(n). command description valid switches table for ATSET(n)=x command ATF 0 as ATF255 ATF 1 V.21 (300/300 bit/s, dx) LGM 1200H1 ATF 2 V.22 (1200/1200 bit/s, dx) LGM 2400D2 ATF 3...
  • Page 113 Register Description V.24 Interface Rate The register is not applicable for direct mode, ref. to command AT\ÁN1. register values / default description 2...15, 20 / 255 V.24 interface rate idle idle 300 bit/s 1200 bit/s 2400 bit/s 4800 bit/s 7200 bit/s 9600 bit/s 12000 bit/s Chapter 4...
  • Page 114 Register Description Function of Da/Te Button The register defines the function of the Da/Te button at the front plate of the modems. The button is designed to perform the functions listed below: register values / default description 0...5 / 1 function of Da/Te button activate test loop data button...
  • Page 115 Register Description Data Format Online Phase register values / default description 0...11 / 0 data format online phase 8 data bits, no parity, 1 stopbit 8 data bits, odd parity, 1 stopbit 8 data bits, even parity, 1 stopbit 8 data bits, no parity, 2 stopbits 8 data bits, odd parity, 2 stopbits 8 data bits, even parity, 2 stopbits 7 data bits, no parity, 1 stopbit...
  • Page 116 Register Description Data Format Command Phase register values / default description 0...11 / 0 data format command phase 8 data bits, no parity, 1 stopbit 8 data bits, odd parity, 1 stopbit 8 data bits, even parity, 1 stopbit 8 data bits, no parity, 2 stopbits 8 data bits, odd parity, 2 stopbits 8 data bits, even parity, 2 stopbits 7 data bits, no parity, 1 stopbit...
  • Page 117 Register Description Dial Backup Reswitching The register defines the duration period that is necessary for faultless V.21 data transmission on the leased line before the modem switches back from switched line to leased line operation. register values / default description 6...255 / 6 dial backup reswitching (unit: 10 secs.)
  • Page 118 Register Description M3 Function at Dial Backup If the register is set to 1 during leased line operation the report line M3 is active constantly thus allowing the DTE to detect any switching to switched line operation. register values / default description 0, 1/ 0 M3 function at dial backup...
  • Page 119 Register Description Command Interpreter register values / default description 0...3 / 0 command interpreter AT commands AT/V.25bis commands (no autobaud!) AT/V.25bis commands and interface lines acc. to V.25bis (no autobaud, ref. to register S51) V.25bis/AT commands and interface lines acc. to V.25bis (no autobaud, ref.
  • Page 120 Register Description Dialing Mode register values / default description 0, 1 / 0 dialing mode with BLACKLISTED with 30 secs. inter digit time Data transmission equipment with automatic dialing are not licensed for unrestricted dialing inside the German network. At dialing modes with BLACKLISTED the modem is blocked after 12 unsuccsessful dial attempts.
  • Page 121 Register Description ECM Mode for FAX Operation register values / default description 0, 1 / 1 ECM mode for fax operation no error correction error correction If your fax software does not support the ECM mode you can activate error correction by typing the command ATS91=x using a terminal. Data protection is disabled if register S91 is set to 0.
  • Page 122 Register Description S102 M3 at Password Protection register values / default description S102 0, 1 / 0 M3 at password protection M3 is not reported M3 is reported The register is important for applications with activated password protection. The terminal equipment does not detect an existing connection if the register is set to 0 unless a valid password was entered after the establishment of the connection.
  • Page 123 V.25bis Commands V.25bis Commands ......125 Reports ................125 Dialing and Telephone Functions ........127 Modem Configuration with V.25bis ........131 5.3.1 DNL Command for LGM 1200H1 Operation ...... 132 5.3.2 DNL Command for LGM 2400D2 Operation ....... 132 V.25 Chapter 5 Operation Manual V.34 - Modems, Version 07/97...
  • Page 124 V.25bis Commands V.25 Chapter 5 Operation Manual V.34 - Modems, Version 07/97...

  • Page 125: 25Bis Commands

    V.25bis Commands V.25bis Commands The compatible mode operates only with V.25bis commands. At software mode operation you can select either AT or V.25bis commands. Changing from AT to V.25bis is possible by setting register S80 to 1 or 2. V.25bis commands are terminated with LF (line feed) or CR (carriage return).
  • Page 126 V.25bis Commands CFIxy Fault Reports The fault report CFI is followed by the two parameters „xy“ that indicate the fault type: CFIAB Dial up or connection interrupted, as no dial tone was received within 20 secs. or the loop current has failed for more than 1 second.

  • Page 127: Dialing And Telephone Functions

    V.25bis Commands Dialing and Telephone Functions Connect Incoming Call This command deactivates a DIC command given before. Incoming calls are accepted automatically by the modems. Disregard Incoming Call The modems issue an INC report at an incoming call. If the user or the software does not initiate a DIC command to within1 second to ignore the call the modem accepts the call.
  • Page 128 V.25bis Commands CRI xxx;yyy Dial Request with Label = dial character sequence = subscriber phone number with national and area code = parameter separation character The dial character sequence xxx consists of the complete telephone number of the subscriber and further parameters: Valid parameters for dial character sequence xxx: Causes a programmable dial pause.
  • Page 129 V.25bis Commands Example for Automatic Dialing with CRI Command PABX Subscriber CRI = 0 : 0511 < 1234567 ; 49 511 987654 (LF) dial request with label wait for 3 s (programmable pause) central office request (e.g. for PABX systems, with 0 here) dial tone recogniition subscriber telephone number:...
  • Page 130 V.25bis Commands CRN xxx Dial a Phone Number The subscriber telephone number is dialed automatically by the modem: e.g. CRN 1234567890 (LF) The parameters for the CRI command are valid for this dial character string. The L may be typed to dial the last telephone number. CRS (n) Dial Up with Short Dial Register The modem dials the dial character string xxx from the short dial register...

  • Page 131: Modem Configuration With V.25Bis

    V.25bis Commands Modem Configuration with V.25bis With the V.25bis command set the modem is not ready for reconfiguration. If the modem is in software mode (ref. to chapter 2) the modem is prepared for configuration with the comfortable AT command set. This is not possible in command mode.

  • Page 132: 5.3.1 Dnl Command For Lgm 1200H1 Operation

    V.25bis Commands 5.3.1 DNL Command for LGM 1200H1 Operation entry 1: 300/300, 75/1200, 1200/75 entry 2: Asynchronous entry 3: idle entry 4: Equalizer, Normal entry 5: idle entry 6: A channel, B channel (V.21 transmitter) entry 7: not for use entry 8: Normal, Stimulated, Controlled (carrier control for V.21)
  • Page 133 Dial Backup Features Dial Backup Features ......135 Function of the Dial Backup Board ......135 Installation of the DBU Board (Standalone Version) .. 135 Installation of the DBU Board (Rackmounted Version) ..........138 Telephone Access Line Selection ......139 Access Line Alternatives ..........
  • Page 134 Dial Backup Features Chapter 6 Operation Manual V.34 - Modems, Version 07/97...

  • Page 135: Dial Backup Features

    Dial Backup Features Dial Backup Features Function of the Dial Backup Board Attention! The dial backup features are not available for the top rail version LGH 28.8D1! ® Due to the implementation of the dial backup board the LOGEM and the LOGEM ®...
  • Page 136 Dial Backup Features 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 910 ® Fig.: 6.1 Bottom of the LOGEM Place the modem in front of you as shown below and remove the jumpers Chapter 6 BR3...BR5 at the position ST5.
  • Page 137 Dial Backup Features The connectors ST4, ST5 and ST6 (ref. to fig. 6,2) provide the contact to the dial backup board. Remove the DBU board from its black antistatical packaging. At the component side of the board are three connectors that fit into the connectors of the main board.

  • Page 138: Installation Of The Dbu Board

    Dial Backup Features Installation of the DBU Board (Rackmounted Version) Remove all cables from your LGM 28.8D1 and extract the modem from its rack or the switching box. Remove the protective caps (9) to open the housing (ref. to fig. 6.4). Then extract the screws 4 and 5 using a screwdriver.

  • Page 139: Telephone Access Line Selection

    Dial Backup Features The connectors ST4, ST5 and ST6 are designed to contact with the dial backup board. Remove the DBU board from its black antistatical packaging. At the component side of the board are three connectors that fit into the connectors of the main board.
  • Page 140 Dial Backup Features For operation without a dial backup board the connectors La, Lb, E,G, a2 and b2 have to be allocated. A 2 wire leased line operation is possible via the La and Lb connectors as well. The FKS8 jack at the front panel of the LGM 28.8D1 is connected in parallel to the 96pole connector as well.

  • Page 141: Access Line Alternatives

    Dial Backup Features Access Line Alternatives Allocation of the 96pole connector of the LGM28.8D1: operation mode Lb G E a2 b2 Tx(a) Tx()b) Rx(a) Rx(b) dial line* DBU possible b2 b8 c7 a7 b4 2/4 wire leased line acc. to CEPT 2 wire leased line acc.
  • Page 142 Dial Backup Features Chapter 6 Operation Manual V.34 - Modems, Version 07/97...
  • Page 143 Applications Applications ......... 145 Remote Configuration Features ......... 145 Leased Line Operation (Standalone Version) ..... 151 7.2.1 Leased Line Operation (Rackmounted Version) ..152 7.2.2 2 Wire Leased Line ............ 153 7.2.3 4 Wire Leased Line ............ 156 7.2.4 Leased Line Operation with Dial Backup ....157 7.2.5 Leased Line Operation with Manual Dial Backup ..
  • Page 144 Applications Chapter 7 Operation Manual V.34 - Modems, Version 07/97...

  • Page 145: Applications

    Applications Applications Remote Configuration Features The features listed below are of general importance for remote con- figuration of the modems. Register S45: The register determines if the modems are ready for remote configuration which is only possible if register S45=1. Password: During existing connections any modem has to be remotely configured must have a password.
  • Page 146 Applications Application 1: The remote modem is configured from remote by a second modem: Here the local modem has to be switched during the existing connection to command phase using the break sequence “+++“. The remote configuration starts after the modem has issued an OK report and after typing the command AT%F or AT%F/PASSWORD.
  • Page 147 Applications Example 1: Deactivation of Remote Configuration TERMINAL LOGEM ® A/O Da/Te LOGEM ® A/O Da/Te LOGEM 928 LOGEM 928 Bedingung: Benutzereinstellung 2 geladen Eingabe Verbindungsaufbau ATD 12345 Meldung CONNECT 2400/REL Eingabe + + + Meldung Eingabe Fernkonfiguration einleiten AT%F Meldung CONNECT REMOTE Eingabe...
  • Page 148 Applications Application 2: Complete reconfiguration after commissioning During commissioning the user setting 2 or basic setting 8 have to be loaded at POWER ON. Now the terminal adapter is ready for remote configuration. The newly installed modem is called from a central using a terminal or PC.
  • Page 149 Applications Example 2: The remote modem is to be remotely configured by another modem. For this application the local terminal and the local data transmission software must be capable to send a BREAK signal. Procedure: The local terminal has to send a BREAK signal after the establishment of a connection when both modems are in the data transmission phase.
  • Page 150 Applications The commands listed here may not be used during remote configuration. AT\B AT\O AT\Y AT\Z The commands will be acknowledged with a %ERROR report. Attention: • Any changes that have not been stored before terminating a connection are lost and have no further effect. •...

  • Page 151: Leased Line Operation (Standalone Version)

    Applications Leased Line Operation (Standalone Version) The operation modes with the dial backup feature described here are not available with the top rail version LGH 28.8D1. The modem supports the leased line operation modes listed below: • 2 wire leased line (switched line interface) AT commands: AT&L1 (ATA/ATD), AT&L2 (originate), AT&L3 (answer) telephone access:...

  • Page 152: Leased Line Operation (Rackmounted Version)

    Applications 7.2.1 Leased Line Operation (Rackmounted Version) The operation modes with the dial backup feature described here are not available with the top rail version LGH 28.8D1. The modem supports the leased line operation modes listed below: • 2 wire leased line (switched line interface) AT commands: AT&L1 (ATA/ATD), AT&L2 (originate), AT&L3 (answer) switched line:...

  • Page 153: 7.2.2 2 Wire Leased Line

    Applications If the modem is equipped with the optional dial backup board it supports only 2 wire leased line operation via the switched line interface. Please refer to the appendix for further information concerning the telephone access connectors and pin allocations. During AT mode the leased line operation mode is selected using the command AT&L(n).
  • Page 154 Applications Configuration Modem A: AT&F0 : load basic setting AT\N5 : data protection MNP 4 AT\Q2 : data flow control RTS/CTS AT&D3 : line access only at S1=ON ATF40 : modulation acc. to V.34 ATS51=12 : interface rate 38,4 kbps ATS60=0 S61=0 : set data format (N81) AT%C0...
  • Page 155 Applications Example 2: The modems are equipped with the optional dial backup board. The modems are to be adjusted without a terminal for 2 wire leased line operation. The connected terminal equipments operate synchronous with a max. transmission rate of 19200 bit/s. Modem A is connected to the HOST and sets the clock.

  • Page 156: 7.2.3 4 Wire Leased Line

    Applications 7.2.3 4 Wire Leased Line Leased line operation is only possible using the dial backup board that is available as an option. The telephone access connector for 4 wire operation is the „Standleitung“ (leased line) connector of the modems. This operation mode allows for connection of asynchronous and synchronous terminal equipment.

  • Page 157: 7.2.4 Leased Line Operation With Dial Backup

    Applications 7.2.4 Leased Line Operation with Dial Backup Leased lines are implemented with applications that need permanent access to data from a host system. At line failures access to current data might not be possible for a longer period. This is no problem if the modems are equipped with the optional dial backup board as they can backup the operation during failures or breakages on the route.

  • Page 158: 7.2.5 Leased Line Operation With Manual Dial Backup

    Applications During switched line operation the leased line is monitored constantly with an integrated V.21 modem. This modem switches back to leased line operation whenever it is able to transmit test data for the period specified in register S63. Register S64 determines if the switched line connection is terminated immediately after successful handshake on the leased line.
  • Page 159 Applications performed with 19200 bit/s synchronous. Modem configuration: modem A modem B description AT&F AT&F load basic setting AT&Z0= (calling load calling number for switch- number B) ing connection to Z0 ATF48 \N1 &M1 AT&F48 \N1 &M1 modulation procedure (V.34/ 19200 bps), set operation mode and transmission proc.
  • Page 160 Applications A connection is established at activation of the data button of modem A. After a second pressing of the Da/Te button the switched connection is terminated again. At an active switched connection the modem switches back to the leased line connection automatically whenever the leased line is operational again.
  • Page 161 Applications Modem configuration: central remote description (modem B) (modem A) AT&F AT&F load basic setting AZ&Z0= (calling load calling number for dial number modem C) connection in Z0 ATF3\N4%C ATF3\N4%C modulation procedure (V.22bis/2400 bps), V.42 data protection, no data compr. ATS51=4 ATS51=4 V.24/V.28 transm.
  • Page 162 Applications If the remote modem activates the interface line S4/SEL it initiates a dial connection to modem C. The central station can establish a connection to the remote partner via modem C. At an active switched line connection the leased line is reactivated whenever the integrated V.21 test modem detects it operational.

  • Page 163: Leased Line Operation

    Applications Leased Line Operation The modems are designed for operation at 2 wire leased lines (telekom specification: analog G/M1040 or better). At point to point connections without VF regenerators a transmission range of 10 ... 12 km is possible at a wire diameter of 0.8 mm. On good cables a transmission range of max.
  • Page 164 Applications Example 1: Leased line 2400 bit/s, asynchronous, 10 bits/character (sum of start, data, parity and stop bit), no data protection or data compression protocols, 3 wire interface to the terminal equipment (1. transmit data, 2. receive data, 3. operating ground) Switches table LGM 2400D2 (V.22bis): Modem 1 / DIP switches: S1.5, S1.9, S2.9, S2.10 = ON...
  • Page 165 Applications Example 2: For a testing installation the modems are not connected directly at the telephone access side. As the leased line has no attenuation in this case transmission errors might occur due to overdriving of the modem receiver. For this reason a resistor of about 470 ohms should be installed at each wire (ref.
  • Page 166 Applications Tab.: Wiring Plan for Asynchronous Cross Cable The modems 2 and 3 have to be connected for this application with a cross cable (zero modem cable). The cross cable is to be utilized for asynchronous application. Chapter 7 Operation Manual V.34 - Modems, Version 07/97...

  • Page 167: Lightning And Overvoltage Protection

    Applications Lightning and Overvoltage Protection Modem failures can be caused by discharges or overvoltages from the telephone access side or the operating voltage whenever lightning discharges occur. Electronical installations within a distance of 1.5 km are subject to hazards when thunderstorms occur due to electro- magnetical fields and line overvoltages.
  • Page 168 Applications Chapter 7 Operation Manual V.34 - Modems, Version 07/97...
  • Page 169 Appendix Appendix ..........171 Appendix A Appendix B1 .............. 174 Connection to a TAE 6NF Socket (Switched Line Operation) .......... 174 Appendix B2 Telephone Access Jacks..........175 Appendix B3 Telephone Access Jacks..........176 Appendix B4 .............. 177 Telephone Access Jacks..........177 Appendix B3 Telephone Access Cable RJ12/TAE 6N .....
  • Page 170 Appendix Chapter 8 Operation Manual V.34 - Modems, Version 07/97...

  • Page 171: Appendix

    Appendix Appendix Appendix A Basic Settings Basic Setting 0: Switches S2.6 S2.7 S2.8 S2.9 S2.10 S3.2 S3.3 S3.4 S3.5 S3.6 automatical detection of modulation procedure, V.42bis, btx- operation possible with transmission ranges < 2400 bit/s, AT commands, autobaud, asynchronous F255 E1 L1 M1 Q0 X4 V1 P \Q2 \G0 \A1 \C3 \L0 \N3 \X0 \K3 \B3 %C1 %E1 %M0 %R0 &L0 &I0 &X0 &G0 &M0 &C2 &D2 &H0 &R1 &S1 &T5 S00=001 S01=000 S02=043 S03=013 S04=010 S05=008 S07=100 S08=002 S10=050 S12=045 S20=255 S26=004 S28=000 S37=000...
  • Page 172 Appendix Basic Setting 1: Switches S2.6 S2.7 S2.8 S2.9 S2.10 S3.2 S3.3 S3.4 S3.5 S3.6 V.22bis, btx, AT commands, 2400 bit/s, asynchronous F3 E1 L1 M1 Q0 X4 V1 P \Q2 \G0 \A1 \C0 \L0 \N1 \X0 \K0 \B3 %C1 %E1 %M0 %R0 &L0 &I0 &X0 &G0 &M0 &C2 &D2 &R1 &H0 &S0 &T5 S00=000 S01=000 S02=043 S03=013 S04=010 S05=008 S07=100 S08=002 S10=004 S12=045 S20=255 S26=004 S28=000 S37=000...
  • Page 173 Appendix Basic Setting 8 = User Setting 2 Switches S2.6 S2.7 S2.8 S2.9 S2.10 S3.2 S3.3 S3.4 S3.5 S3.6 automatical detection of modulation procedure, V.42bis, btx- operation possible with transmission ranges < 2400 bit/s, AT commands, autobaud, asynchronous F255 E1 L1 Q0 X4 V1 P \Q2 \G0 \A1 \C3 \L0 \N3 \X0 \K3 \B3 %C1 %E1 %M0 %R0 &L0 &I0 &X0 &G0 &M0 &C2 &D0 &H0 &R1 &S1 &T5 S00=001 S01=000 S02=043 S03=013 S04=010 S05=008 S07=100 S08=002 S10=050 S12=045 S20=255 S26=004 S28=000 S37=000...

  • Page 174: Appendix B1

    Appendix Appendix B1 Connection to a TAE 6NF Socket (Switched Line Operation) La Lb b2 a2 RJ12 Belegt- Erkennung Ruf- Erkennung TAE 6N Chapter 8 TAE 6F Telefon Operation Manual V.34 - Modems, Version 07/97...

  • Page 175: Appendix B2

    Appendix Appendix B2 Telephone Access Jacks LOGEM 928 1: switched line and 2 wire leased line 2: 2/4 wire leased line with optional dial backup board Chapter 8 Operation Manual V.34 - Modems, Version 07/97...

  • Page 176: Appendix B3

    Appendix Appendix B3 Telephone Access Jacks LGM 28.8D1 LOGEM ® 28.8D1 Da/Te SERV. Chapter 8 VG Connector FKS8 Jack For switched line operation and 2/4 wire leased line with dial backup the FKS8 jack is connected in parallel to the related pins of the VG connector. Operation Manual V.34 - Modems, Version 07/97...

  • Page 177: Appendix B4

    Appendix Appendix B4 Telephone Access Jacks LGH 28.8D1 Chapter 8 Operation Manual V.34 - Modems, Version 07/97...

  • Page 178: Appendix B3

    Appendix Appendix B3 Telephone Access Cable RJ12/TAE 6N coding N yellow 3 4 green TAE 6N brown 2 5 white grey 6 rosa Chapter 8 RJ12 allocation of the allocation of the switched line cable leased line cable colour descr. RJ12 colour descr.

  • Page 179: Appendix B4

    Appendix Appendix B4 Telephone Access Cable FKS8/TAE 6N coding N 4 yellow green 3 5 grey TAE 6N brown 2 6 rosa white 1 brown grey Chapter 8 green shield FKS8 yellow white rosa connector allocation white brown green yellow grey rosa shield...

  • Page 180: Appendix C1

    Appendix Appendix C1 Data Interface LGM 28.8D1 ITU-T int. name description ground transmit data receive data ready to send clear to send data set ready data terminal ready = S1.1 or DTE operational = S1.2 data carrier detect incoming call test status transmit clock from DCE receive clock from DCE...

  • Page 181: Appendix C2

    Appendix Appendix C2 Interfaces LGM 28.8D1 Lb * La * Tx a (2-w.) Rx a Rx b Tx b (2-w.) b2 * a2 * ext. call generator S1/1 (SET1) S1/2 (SET2) S1/3 (SET3) S1/4 (SET4) S1/5 (SET5) S1/6 (SET6) S1/7 (SET7) ____ (ext.

  • Page 182: Appendix C3

    Appendix Appendix C3 V.24 Interface Allocations Pin No. Direction ITU-T Name Description DTE-Modem name name ISO-2110- Verbinder prot. ground ground transmit data receive data request to send clear to send data set ready data terminal ready S1.1 108/1 DTE ready S1.2 108/2 data carrier detect...

  • Page 183: Appendix C4

    Appendix Appendix C4 Asynchronous Standard Connection Modem prot. ground ground transmit data receive data request tosend ready to send S 1.1 108.1 data terminal ready S 1.2 108.2 DTE ready data set ready ring indicator incoming call remote loop high transm. rate set high transm.

  • Page 184: Appendix C5

    Appendix Appendix C5 Synchronous Standard Connection Modem prot. ground ground transmit data receive date request to send ready to send data terminal ready S 1.1 108.1 DTE ready S 1.2 108.2 data set ready receive level ringindicator remote loop local loop receive clock Chapter 8 transmit clock...

  • Page 185: Appendix C7

    Appendix Appendix C6 Allocation of the 25pole Sub D Jack The LOGEM 928 and the LGH 28.8D1 feature a 25pole sub D jack (acc. to ISO 2110) for DTE connection. A V.24 interface cable is part of the delivered items. The signal, report and data lines come with V.28 levels.

  • Page 186: Appendix C8

    Appendix Appendix C8 Modem Identification Identification of the modem specification (board, software version etc.) is possible from the modem sticker or with a software command. Modem Sticker 377 XXX XX / article number 9308 / production year/week / serial number K.XX / configuration state The so called K number (for configuration state) indicates the modem...

  • Page 187: Ascii Table

    Appendix Appendix D ASCII Table Code Code Code Code Mnem DecHex DecHex DecHex DecHex NULL CTRL A CTRL B " CTRL C CTRL D CTRL E CTRL F & CTRL G ´ CTRL H CTRL I CTRL J CTRL K CTRL L CTRL M CTRL N...

  • Page 188: Appendix E Glossary

    Appendix Appendix E Glossary Dial Backup Unit Data Terminal Equipment Dial Backup Dial backup (switching of a secondary path via switched lines) is activated whenever the leased line is broken. The modem establishes automati- cally a switched line connection to the remote station.
  • Page 189 Appendix normal mode The modem buffers data coming from the DTE. For this reason the transmission rate DTE/modem may differ from the modem to modem transmission rate. To prevent data losses the data flow control has to be activated. The modem processor controls the data transfer from the modem buffer.
  • Page 190 Appendix checksum for each received block and compares it with the received checksum. A block is being positively acknowledged if no errors occur. A retransmission of the block is requested if any errors occur. data compression Due to the data compression the data of the trans- mitting modem is compressed with special algo- rithms and transmitted.

  • Page 191: Appendix F Technical Data

    Appendix Appendix F Technical Data standalone rackmounted top rail LOGEM LOGEM LOGEM LGM 28.8D1 LGH 28.8D1 dimensions (h x w x d) in mm 40 x 114 x 180 130 x 26 x 190 135 x 43 x 124 environmental conditions at operation/storage 0...40 °C / -25 ...
  • Page 192 Appendix Chapter 8 Operation Manual V.34 - Modems, Version 07/97...

  • Page 193: Appendixg Index

    Appendix AppendixG Index Symbols 2 wire leased line ..........153 2/4 wire leased line ..........18 25pole sub D jack ..........185 4 wire leased line ..........156 applications ............145 ASCII table ............187 asynchronous operation ........76 AT command set ..........17, 67 automatic dialing ..........
  • Page 194 Appendix command interpreter ......... 68, 119 command line ............ 67 compatibility ............17 compatible mode ..........16, 34 CONNECT ............80 Country Setting for LGH 28.8D1 ....... 64 Da/Te button ............114 data compression ..........15–16, 17, 92, 190 data flow control ..........93, 189–190 data format ............
  • Page 195 Appendix fax message ............29 fax operation ............18 fax software ............18 FAX transmission rate ........120 FKS8 jack ............176 Front Panel LOGEM ® LGM 28.8D1 ....21 Front Panel LOGEM ® 928 ....... 19 Front Panel LOGEM ® LGH 28.8D1 ....23 glossary .............
  • Page 196 Appendix LOGEM ® 928/LGM 28.8D1 Asynchronous ..50 LOGEM ® 928/LGM 28.8D1 Synchronous V.25bis ......48 LOGEM ® LGH 28.8D1 ........15 loudness ............101 loudspeaker setting ........... 101 manual dial backup ........... 158 mixed mode ............16, 34 Mixed Mode Switches ......... 43 MNP 1...4 ............
  • Page 197 Appendix register description ..........107 reliable mode ............. 100–101, 189–190 remote access ........... 111 remote configuration ......... 15,16, 18, 100, 145ff. result codes ............79 retrain ..............94 ROM ..............105 safety instructions ..........9 secondary path ..........135 short dial register ..........130 Side View LOGEM ®...
  • Page 198 Appendix user setting ............35, 84–87 V.24 interface allocations ........182 V.25bis commands ..........17, 125 V.42 ..............145–150, 190 V.42bis ............... 190 verbose result codes ......... 79 XOFF character ..........111 XON character ........... 111 XON/XOFF character ........... 94 Chapter 8 Operation Manual V.34 - Modems, Version 07/97...
  • Page 199 Appendix Chapter 8 Operation Manual V.34 - Modems, Version 07/97...
  • Page 200 Appendix Chapter 8 Operation Manual V.34 - Modems, Version 07/97...

This manual is also suitable for:

Logem lgm 28.8d1Logem 928

Table of Contents