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Troubleshooting Tips
Before you call technical support organization for assistance, check the following :
1. The power supply is connected and the power LED is on.
2. Turn the power off and on again, observe the alarm (ALM) LED
During power-up self-test, the ALM LED flashes.
If the ALM LED flashes and remains on for more than 10 seconds, there is an internal hardware
failure. Notify your reseller that the ISDN router has failed the self-test, and order a replacement.
If the LED goes off after the test has been completed, the power-up self-test has been successful.
3. Verify that the ISDN cable (RJ45, 8 pin position) is connected to the ISDN router and make
sure that it is an ISDN connection, not a plain old telephone connection.
The ISDN router will not operate if connected to an analog telephone wall jack. If your ISDN
router is equipped with U interface, make sure that the ISDN router is connected directly into the
ISDN wall outlet. If your ISDN router is equipped with a S/T interface, make sure that the ISDN
router is connected to an intermediate telephone device called NT-1.