Paradyne CSU, DSU, 9126-II, 9128-II Verifying Isdn Lines, Verifying That Backup Can Take Place

7. Operation and Maintenance

Verifying ISDN Lines

Use either of the following methods to verify operation of the ISDN lines.

Check the status of the DBM interface:

Main Menu → Status→ DBM Interface Status

Line Status should display Active. If an invalid (Inv) status appears (e.g., Inv

SPID for an ISDN BRI DBM) in the Line Status field, verify that you entered

TISDN physical options correctly. Check the status of the unit:

Main Menu → Status→ System and Test Status→

Health and Status column

System Operational should appear.

If ISDN Network Failed appears, check that both ends of the ISDN cable are seated properly for a good physical connection. If that does not clear the message, verify that you entered ISDN physical option information correctly, then contact the network service provider.

See DBM Interface Status on page 7-38,and Table 7-8, Health and Status

Messages, for additional status information.

Verifying That Backup Can Take Place

As each remote site is installed, verify its backup operation by unplugging the network cable so the system is forced into backup.

Verify the ISDN lines by checking the DBM Interface Status.

Main Menu → Status→ DBM Interface Status

Line Status should be Active. If an invalid (Inv) status (e.g., Inv SPID) is displayed, verify that you entered ISDN physical options correctly.

TCheck backup setup and that data can be passed between DBMs. Reconnect the network cable.

See Table 7-8, Health and Status Messages, Viewing LEDs and Control Leads on page 7-4,and DBM Call Performance Statistics on page 7-67,for additional information.

7-74 September 2002 9128-A2-GB20-80