Troubleshooting ISDN connections

If you have problems with your ISDN configuration:

1. Verify basic hardware functionality and the integrity of your ISDN connection.

2. If available, run any diagnostic utilities that were shipped with your terminal adapter; consult your hardware documentation for more information.

3. Adjust your advanced configuration options (if available) in consultation with your ISDN provider.

4. You can enable debug logging for incoming and outgoing calls; see the isdnmon(1M) and isdndialer(1M) manual pages, respectively.

You must also be aware of these issues:

• ``Missing or incorrect SPIDs''

• ``Network termination problems''

• ``Differing national ISDN standards''