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61200.070L1-1 Express XL/XLT User Manual 107
Chapter 4
Troubleshooting
When the Express XL/XLT powers up, it performs an internal self-test. This
takes about 10 seconds. At the end of the test, the PWR LED should remain on.
IF SELF-TEST FAILS
If the PWR LED is not on or continuously flashes, the following steps will ver-
ify whether or not the problem can be fixed locally.
1. Ensure the Express XL/XLT is receiving power.
2. Power off the Express XL/XLT while holding down SELECT and TEST;
then power back up. This will reset all internal settings to their factory de-
fault.
3. Continue holding the SELECT and TEST buttons until the Loop LED
flashes once.
4. If the Express XL/XLT still does not pass self-test, call ADTRAN Technical
Support for assistance. See the inside back cover of this manual for infor-
mation on contacting ADTRAN.
IF THE EXPRESS XL/XLT DOES NOT READ
READY
When the Express XL/XLT has been set up and connected to a line, but the
Loop LED does not remain on after a few minutes, proceed with the following
steps:
1. Cycle power on the Express XL/XLT, leaving it off for a minimum of two
seconds; then turn the power on for one minute to ensure the Loop LED
still doesn’t turn on.