ZyXEL zyxel Prestige100 User Manual download pdf (Page 122)

110 Troubleshooting

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.

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ZyXEL zyxel Prestige100 User Manual Page 122