Avaya S8700 Maintenance Manual page 192

Additional Maintenance Procedures
11. Terminate the test by entering test ds1-loop location end
cpe-loopback-jack-test. Wait about 30 seconds for the DS1 to re-frame
on the incoming signal and clear DS1 facility alarms.
Loopback termination fails under the following conditions:
a. The span is still looped somewhere. This could be at the loopback
b. The DS1 cannot frame on the incoming span's signal after the
12. Restore the "TX LBO" field to the original value recorded in
13. Release the DS1 circuit pack using the release board UUCCSSpp
command.
14. Leave the loopback jack connected to the DS1 span.
Loopback Jack Fault Isolation Procedures
This section describes the possible DS1 configurations in which the loopback jack
may be used. These configurations are when:
The DS1 provider includes a smart jack.
No smart jack is provided at all.
A site uses fiber multiplexers.
These configurations are separated into
''Configurations without a Smart Jack'' on page
5-6 Issue 1 May 2002
jack, at the ICSU, or somewhere in the network. This state is
indicated by a fail code of 1313. If the red LED on the loopback jack
is on, replace the ICSU. Re-run the test and verify that the loopback
test terminates properly. If not, replace the DS1 circuit pack and
repeat the test.
loopback jack is powered down. This means that there is something
wrong with the receive signal into the loopback jack from the "dumb"
block or the smart jack. If the service provider successfully looped
and tested the span, up to the smart jack, this condition isolates the
problem to the wiring between the loopback jack and the smart jack.
Refer to "Loopback Jack Fault Isolation Procedures" for information
about how to proceed in this case. The test cannot be successfully
terminated until a good signal is received. To properly terminate the
test before a good receive signal is available, enter reset board
location.
''Configurations Using a Smart Jack''
5-11.
step 2.
and
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