Chapter 5 troubleshooting – ADTRAN XRT User Manual
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Express XR/XRT Quick Start Guide
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Chapter 5. Troubleshooting
Chapter 5
Troubleshooting
TROUBLESHOOTING GUIDELINES
This section provides troubleshooting techniques to possible
problems that may be encountered while operating the Express
XR/XRT. If problems persist contact ADTRAN technical support
for assistance (see the back cover of this manual).
Power/Line LED is Off
Indicates a problem with the power to the unit. Verify the power
cord is connected to the Express XR/XRT and is plugged into a
known working 120 volt AC electrical outlet.
Power/Line LED Flashes and B1 and B2 LEDs are Off
This indicates a problem with the physical connection of the
ISDN line from the local telephone company to the Express XR/
XRT.
1.
Verify the large end of the RJ-45 to RJ-11 telephone cable
(included with the Express XR/XRT) is connected to the
ISDN connector on the rear panel of the Express XR/XRT.
2.
Verify the small end of the RJ-45 to RJ-11 telephone cable is
connected to the ISDN telephone wall jack installed with
Basic Rate ISDN.
3.
Contact the local telephone service provider.