Paradyne 9126-II, CSU, DSU, 9128-II manual Isdn DBM Problems Symptom Possible Cause Solutions

8. Troubleshooting

ISDN DBM Problems

Table 8-4. ISDN DBM Problems

Symptom	Possible Cause	Solutions
Cannot connect to the	Misconfiguration	Verify that the link profiles are
remote unit		correct in both units, both the
		area codes and phone or ID
		numbers (see Setting Up ISDN
		Link Profiles in Chapter 4,
		Configuration Options).
		For a BRI DBM, verify that the
		SPIDs and local area codes
		and phone numbers are
		correct (see Configuring the
		ISDN DBM Interface in
		Chapter 4, Configuration
		Options).
		Verify that the unit at one end is
		configured to originate and the
		unit at the other end is
		configured to answer a call.
		Verify that the ISDN interface is
		Tenabled.
		Verify that Auto Backup is
		enabled and no time
		restrictions apply.
DBM LMI comes up,	Misconfiguration	Check that the DLCI numbers are
but no data is		correct and are the same at both
transferred		ends.

See Table 7-14, Most Recent and Previous Cause Value Messages, in Chapter 7, Operation and Maintenance, for additional information about ISDN problems. Last Cause Value messages appear on the DBM Interface Status screen.

Main Menu → Status → DBM Interface Status

See Configuring the ISDN DBM Interface and Setting Up ISDN Link Profiles in Chapter 4, Configuration Options, for more information about ISDN DBM configuration.

9128-A2-GB20-80 September 2002 8-17