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61200.153L1-13 Express XR/XRT Quick Start Guide 47

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.

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Adtran XRT Manual de usuario Pagina 59