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DS1/T1 CPE loopback jack
Issue 9.1 June 2006 425
9. Type test ds1-loop location end-loopback/span-test to end the test.
Wait about 30 seconds for the DS1 to reframe on the incoming signal and clear DS1 facility
alarms. Use Table 30: Evaluation of DS1 loopback test results
on page 425 to evaluate the
test results and to determine the solution.
To restore DS1 administration
1. At the SAT, type change ds1 XXXVS to open the DS1 administration form.
2. Go to page 2 of the DS1 administration form.
3. Change the value of the TX LBO field to the original value that you wrote down when you
were administering the DS1 for the test.
4. Press ENTER to save the changes.
To release the DS1 circuit pack
1. At the SAT, type release board XXXVS.
2. Leave the loopback jack in place.
Table 30: Evaluation of DS1 loopback test results
Condition Solution
Loopback termination fails
with an error code of 1313.
The span is still looped somewhere, possibly at the
loopback jack, at the ICSU, or somewhere in the
network.
The red LED on the loopback
jack is on.
Replace the ICSU, and re-run the test.
Loopback termination still
fails.
Replace the DS1 circuit pack, and repeat the test
The DS1 cannot frame on
the incoming span’s signal
after the loopback jack power
down.
There is something wrong with the receive signal
into the loopback jack from the dumb block or the
smart jack.
The span failed the service
provider’s loopback test.
The problem is in the service provider’s network.
The service provider
successfully loop tested the
span, up to the smart jack.
The wiring between the loopback jack and the
smart jack is suspect. Test, and make repairs, as
needed.
You cannot locate and repair
the problem in the time
available and must terminate
the test.
The test will not terminate normally in the absence
of a good framing signal. You have to reset the
circuit pack. Enter reset board XXXVS.
The test terminated normally. Proceed with To restore DS1 administration
.