Paradyne Comsphere 3920Plus Installation And Operation Manual page 213

COMSPHERE 392xPlus Modems
Symptom
The modems do not train-up on
leased lines.
Symptom
The dial backup line is present, but
the modems cannot connect.
The modem does not switch back to
leased-line operation.
B-2
Table B-2
Leased-Line Operation
Verify that the correct cabling is used for your application. Refer to Chapter 2,
Modem Installation .
Verify that one modem is configured for Answer mode and the other is
configured for Originate mode. (For TMp operation one modem must be
configured as a control modem and the other as a tributary modem.)
Verify that both modems are using the same modulation scheme.
Verify that both modems are configured for the appropriate leased-line mode.
For example, if you have a 4-wire leased line, then the modems must be
configured for 4-wire operation.
Table B-3
Dial Backup Operation
Verify that the correct telephone number for the remote modem is stored in
directory location 1.
Verify that both modems have the Auto Dial Backup configuration option set to
Enable. Refer to Leased Line in Chapter 4.
Call the answering modem with a handset and verify that the modem's answer
tone is transmitted.
Verify that the Auto Dial Standby configuration option is enabled. Refer to
Leased Line in Chapter 4.
April 1995
Action
Action
3920-A2-GN31-10