ZyXEL Communications 2864I user manual Problems With the ISDN Line, The ISDN initialization failed

Problems With the ISDN Line

The ISDN initialization failed

This problem occurs when you attempt to save the parameters entered in menu 2, but receive the message, “Save successful, but Failed to initialize ISDN; Press ESC to exit”.

1.Check the error log (in menu 24.3.1), you should see a log entry for the ISDN initialization failure in the format, “ISDN init failed. code<n>...”. Note the code number, n.

2.If the code is 1, the ISDN link is not up. This problem could be either the ISDN line is not properly connected to the Prestige, or the ISDN line is not activated. Verify that the ISDN line is connected to the Prestige and also to the wall outlet (to the telephone company).

3.If the code is 2, this indicates an SPID error. Verify the SPID(s) that you have entered in menu 2. If these are correct, try to initialize again from menu 24.4.3.

4.If the code is 3, this indicates a general failure. Verify the SPID(s) in menu 2. If these are correct, you may also need to verify the provisioning information for your switch by contacting your telephone company.

The ISDN loopback test failed

If the ISDN initialization has passed, then the loopback test should also pass. Verify the phone numbers that have been entered in menu 2. The loopback test will dial the number entered in the 2nd Phone # field (except for switch types with only one phone number). If you need to dial a prefix (e.g., 9) to get an outside line, then you have to enter the phone number as 95551212 or 914085551212. If it is an internal line, you may only need to enter the last four or five digits (according to your internal dialing plan), e.g., 51212.

134 Troubleshooting