KE LOGEM LGH 28.8D1 User manual

Operation Manual
V.34 - Modems
LOGEM ®928
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
Fax: ++49 (511) 67 47 - 376
Internet: http://www.ke-online.de
T-Online: *ke #
Ordering Number: 371 977 46

Attention:
The versions: LOGEM ®928
(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.
The product meets the rules of the conformity
declaration at operational conditions that can be
considered as normal use.

3Operation Manual V.34 - Modems, Version 07/97
Contents
1 Modem Description........................................... 15
2 Switches Description......................................... 33
3 AT Commands ................................................... 67
4 Register Allocation .......................................... 105
5 V.25bis Commands ......................................... 125
6 Dial Backup Features ...................................... 135
7 Applications..................................................... 145
8 Appendix ......................................................... 171
Chapter 8
S1 M2 D1 M5 D2 A/O Da/Te LOGEM®
928
Chapter 1
Chapter 7
AT
Chapter 3
Chapter 6
ON
Chapter 2
REG
Chapter 4
V.25
bis
Chapter 5

4Operation Manual V.34 - Modems, Version 07/97
Contents
Contents
General ...............................................................................................9
Safety Instructions..................................................................................9
About The Manual ................................................................................11
1 Modem Description.................................................................15
1.1 Transmission Procedures ....................................................16
1.2 AT Commands .....................................................................17
1.3 Compatibility........................................................................17
1.4 V.25bis Commands..............................................................17
1.5 Automatic Dialing ................................................................17
1.6 Data Compression and Data Protection .............................17
1.7 Password Protection and Callback.....................................18
1.8 Remote Configuration .........................................................18
1.9 2/4 Wire Leased Line Operation with Dial Backup .............18
1.10 Fax Operation ......................................................................18
1.11 License.................................................................................18
1.12 Front Panel LOGEM ® 928 .................................................19
1.13 Backpanel LOGEM ® 928 ...................................................20
1.14 Front Panel LOGEM ® LGM 28.8D1..................................21
1.15 Side View LOGEM ® LGM 28.8D1 .....................................22
1.16 Front Panel LOGEM ® LGH 28.8D1 ...................................23
1.17 Top Side LOGEM ® LGH 28.8D1........................................24
1.18 Connection Example ...........................................................25
1.19 Installation and Commissioning
(Standalone Versions)..........................................................26
1.20 Installation and Commissioning
(Rackmounted Versions)......................................................27
1.21 Installation and Commissioning
(Top Rail Versions) ...............................................................28
1.22 Loading of Basic Settings ...................................................29
1.23 Event Report System...........................................................29
2 Switches Description ..............................................................33
2.1 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
2.2.2 LOGEM ® 914/LGM 14.4D1 Asynchronous
(software mode/AT and V.25bis)..........................................46

5Operation Manual V.34 - Modems, Version 07/97
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
2.3 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
2.3.4 Basic Setting 8 (User Setting 2) ..........................................54
2.4 Switches Table Basic Setting 0 (Software Mode) ...............55
2.4.1 Switches Table Basic Setting 1 ...........................................56
2.4.2 Switches Table Basic Setting 8 (User Setting 2).................57
2.5 Transmit and Receive Levels (Standalone Versions) ..........58
2.6 Board of the LOGEM ® 928 (Standalone Version) ............59
2.7 Transmit and Receive level (Rackmounted Version)...........60
2.8 Board of the LGM 28.8D1 ...................................................61
2.9 Transmit And Receive Level (Top Rail Version)..................62
2.10 Board of the LGH 28.8D1....................................................63
2.11 Country Setting for LGH 28.8D1.........................................64
3 AT Commands .........................................................................67
3.1 General ................................................................................67
3.2 Command Description ........................................................68
3.3 Telephone and Dialing Features ..........................................69
3.3.1 Test Loops ...........................................................................77
3.3.2 Storing and Displaying of Telephone Numbers ..................78
3.4 Report Codes ......................................................................79
3.5 Changing of Register Contents...........................................83
3.6 Activation of Control and Report Lines...............................86
3.7 Data Protection Protocols ...................................................89
3.7 BREAK Handling..................................................................92
3.8 Handshake...........................................................................93
3.9 Module Functions................................................................95
3.10 Password Protection ...........................................................96
3.11 Remote Configuration .......................................................100
3.12 Loudspeaker......................................................................101
4 Register Allocation................................................................105
4.1 Modem Memory Locations ...............................................105
4.2 Register Description ..........................................................107

6Operation Manual V.34 - Modems, Version 07/97
Contents
5 V.25bis Commands ................................................................125
5.1 Reports ..............................................................................125
5.2 Dialing and Telephone Functions ......................................127
5.3 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
6 Dial Backup Features............................................................135
6.1 Function of the Dial Backup Board...................................135
6.2 Installation of the DBU Board
(Standalone Version)..........................................................135
6.3 Installation of the DBU Board
(Rackmounted Version) .....................................................138
6.4 Telephone Access Line Selection .....................................139
6.5 Access Line Alternatives ...................................................141
7 Applications ...........................................................................145
7.1 Remote Configuration Features ........................................145
7.2 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.............158
7.3 Leased Line Operation ......................................................163
7.4 Lightning and Overvoltage Protection ..............................167
8 Appendix.................................................................................171
Appendix A ........................................................................171
Appendix B1
Connection to a TAE 6NF Socket .....................................174
Appendix B2
Telephone Access Jacks...................................................175
Appendix B3
Telephone Access Jacks...................................................176
Appendix B4
Telephone Access Jacks...................................................177

7Operation Manual V.34 - Modems, Version 07/97
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 ............183
Appendix C5
Synchronous Standard Connection ..................................184
Appendix C7
Modem to Modem Cross Cable (asynchronous) ..............185
Appendix C6
Allocation of the 25pole Sub D Jack.................................185
Appendix C8
Modem Identification.........................................................186
Appendix D
ASCII Table ........................................................................187
Appendix E
Glossary.............................................................................188
Appendix F
Technical Data ...................................................................191
Appendix G
Index ..................................................................................193

8Operation Manual V.34 - Modems, Version 07/97
Contents

9
Operation Manual V.34 - Modems, Version 07/97
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.
• Disable the power supply before removing the housing (standalone)
or the casing of the rackmounted versions.
• Boards may be only extracted after any connections have been
removed.
• Make sure that other units you are going to connect to your device
meet all specifications.

10 Operation Manual V.34 - Modems, Version 07/97
General