User manual

Contents v
Physical Specifications..................................................................................................................................................79
T1 Modem Bank Power Cord Specifications.........................................................................................................79
T1 Modem Bank Environmental Requirements.....................................................................................................80
T1 Modem Bank Rack Specifications....................................................................................................................80
Standalone Unit Specifications.......................................................................................................................80
Rack Specifications.........................................................................................................................................80
4U 19 Inch Rack System .........................................................................................................................80
4U 24 Inch Rack System .........................................................................................................................80
Daisy Chain Cables................................................................................................................................................81
Terminator Plug .....................................................................................................................................................81
T1 Loop Back Plug ................................................................................................................................................81
T1 Modem Bank Certification ...............................................................................................................................82
Glossary.........................................................................................................................................................................83
Appendix A — Memory Conflicts................................................................................................................................85
Contention for Memory Addresses ........................................................................................................................85
ISA Host Adapters ..........................................................................................................................................87
Conflicts Between 8-Bit and 16-bit Memory Devices....................................................................................87
EISA Host Adapters........................................................................................................................................88
Appendix B — Transmission Modes ............................................................................................................................89
Appendix C — Terminal Port Cable.............................................................................................................................91
Appendix D — Specifications and Wiring Pin Diagrams............................................................................................92
Line Card Connector..............................................................................................................................................92
Connector for Sync Channels.................................................................................................................................93
Terminal Port .........................................................................................................................................................93
Appendix E — Generic T1 Modem Bank Wiring Modes.............................................................................................94
Eight-Wire Direct Wiring ......................................................................................................................................94
Four-Wire Direct Wiring........................................................................................................................................95
Restrictions on Daisy Chain Cable Lengths...........................................................................................................96
Eight-Wire Synchronous Modem Wiring ..............................................................................................................97
Appendix F — Modem AT Command Set....................................................................................................................99
Basic AT Commands .............................................................................................................................................99
AT& (Ampersand) Commands .............................................................................................................................105
AT% (Percent) Commands ..................................................................................................................................111
AT\ (Backslash) Commands ................................................................................................................................112
AT- (Dash) Commands ........................................................................................................................................116
AT" (Quote) Commands ......................................................................................................................................117
Class 1 FAX Commands......................................................................................................................................118
Class 2 FAX Commands......................................................................................................................................120
Class 2 FAX Responses ................................................................................................................................127
S Registers............................................................................................................................................................128
S Register Definitions...................................................................................................................................129
Result Codes.........................................................................................................................................................143
Display Format Options................................................................................................................................143
Extended Message Options...........................................................................................................................144
Negotiation Progress Messages ....................................................................................................................146
Index............................................................................................................................................................................149