Zhone 3920Plus Manual de instrucciones descargar pdf (Pagina 270)

COMSPHERE 392xPlus Modems

B-2 October 1998 3920-A2-GH30-40

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 5, Configure Branch.

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 5, Configure Branch.

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Zhone 3920Plus Manual de instrucciones Pagina 270