Avaya S8700 Maintenance Manual page 246

Maintenance Object Repair Procedure
Maintenance Loop-Around Test (#886)
This test checks whether an IPSI circuit pack's Packet Interface circuit can send
and receive data correctly. It establishes a LAP-D link from the IPSI's Packet
Interface circuit back to the same Packet Interface circuit, and transmits and
receives test data over that testing link. While timing signals from the packet bus
are used for the data transfer, the data itself is looped around on the circuit pack
at the interface to the packet bus and does not get sent over the packet bus.
NOTE:
In a high-reliability system (duplicated IPSIs), this test does not run on a
standby IPSI's Packet Interface circuit. However, a failure of the
Maintenance Loop-Around test may have caused an IPSI interchange that
reported an alarm (associated with the loop-around failure, error code 769)
against standby IPSI's Packet Interface circuit. If so, and if every other
Packet Interface test in test packet-interface Uc long sequence passes,
enter set ipserver-interface to force the standby IPSI to go active. Then,
enter the test packet-interface Uc command to run the Maintenance
Loop-Around test, and verify that the problem has been cleared.
Table 8-396. Test #886 Maintenance Loop-Around Test
Error Test
Code Result Description / Recommendation
1006, ABORT Since the IPSI circuit pack's Packet Interface circuit is out of service, normal
1137 maintenance tests do not run on that circuit pack.
1. Enter reset packet-interface Uc to reset the Packet Interface circuit.
1139 ABORT The packet bus is alarmed.
1. Try to retire the alarm associated with the packet bus. Refer to the Alarm
2. Retry the command when the alarm associated with the packet bus is
1335 ABORT Internal IPSI error. Since the Packet Interface circuit is on the standby IPSI,
this test is not allowed to execute.
1. To run this test on the standby Packet Interface circuit, enter set
1373 ABORT Could not establish the link loop around link to run this test.
1. Retry the command at 1-minute intervals up to 3 times.
8-942 Issue 1 May 2002
For further action, see the repair procedures in
for the Packet Interface Reset test (#889).
Log via the display alarms command. Refer to the maintenance
documentation for Packet Bus maintenance for further action.
retired.
ipserver-interface Uc to activate it.
Table 8-394 on page 8-938
Continued on next page
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