Lucent Technologies PortMaster, Configuration Manual

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Using ISDN BRI 12-21
Troubleshooting an ISDN BRI Connection
4. If you notice a problem, do the following:
a. Reset the port on the PortMaster in Denver.
b. Change the settings you think are causing the problem.
c. Dial San Francisco again.
d. Repeat this procedure until the connection is made correctly.
5. Repeat Steps 1 through 4, dialing from San Francisco to Denver.
Troubleshooting an ISDN BRI Connection
Most ISDN configurations come up with little trouble if you have configured the
PortMaster using information from your telephone company. However, if you are
having problems, use the information in this section to try to debug your configuration.
To display ISDN debug information on the console, enter the following commands:
Command> set console s1
Command> set debug isdn on
To turn off debugging, enter the following commands:
Command> set debug isdn off
Command> reset console
If you are having trouble with an ISDN connection, verify the following:
• The error counters should be 0 except for a small number of abnormal termination
errors resulting from plugging cables in or out. If your error counters are nonzero,
the problem is external to the PortMaster.
• Verify that you are using the correct cables and that they are attached securely to
the correct port.
• Verify that the ISDN status LED is on solid; otherwise, refer to the hardware
configuration guide for more information. This LED indicates connectivity to the
ISDN switch.
• Verify your configuration as described in this chapter.
• Contact your carrier to review the ISDN switch type, SPIDs, and the status of their
line.