Adjuncts and Peripherals
DS1/T1 CPE loopback jack
SI Installation and Upgrades
821
June 2004
5
End the test. Enter
test ds1-loop location end cpe-loopback-jack-test.
6
Wait about 30 seconds for the DS1 to reframe on the incoming signal and clear DS1 facility
alarms.
Restoring DS1 administration
1
At the management terminal, open the DS1 administration form. Enter
change ds1 location
.
2
Change 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
on page 819.
4
Press Enter to make the changes, CANCEL to quit without changes.
Releasing the DS1 circuit pack
1
Release the DS1 circuit pack. From the management terminal, enter
release board location
.
2
Leave the loopback jack in place.
Testing the DS1 span from the smart jack to
the network interface termination or fiber
multiplexer (MUX)
1
Have the service provider run a smart-jack loopback test against the network interface wiring that
links the smart jack to the CO (section 3 in
Figure 315
through
Figure 317
).
2
If the tests fails, there is a problem on the network side. Have the service provider correct it.
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 location
.
The test terminated normally.
Proceed with
Restoring DS1 administration
.
