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COMSPHERE 392xPlus Modems
B-2 November 1996 3920-A2-GN31-30
Table B-2
Leased-Line Operation
Symptom
Action
The modems do not train-up on
leased lines.
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
Symptom
Action
The dial backup line is present, but
the modems cannot connect.
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.
The modem does not switch back to
leased-line operation.
Verify that the Auto Dial Standby configuration option is enabled. Refer to
Leased Line
in Chapter 4.