Avaya DEFINITY Server CSI Maintenance Manual page 1650

Maintenance Objects
ISDN Test Call Test (#258)
This test performs a far-end loop around to a far-end switch over an ISDN trunk.
The trunk's service state must be in-service, maint-NE, or out-of-service/NE, and
no call can be active on the trunk.
A test call connection is established to a far-end switch over the ISDN trunk to be
tested. The digital port on a TN711D Maintenance/Test circuit pack generates a
test-pattern bit stream which is sent to the far-end switch and echoed back. The
received pattern is then compared to the sent pattern and checked for errors that
indicate a loss of integrity on the communications path.
If a test call is running when scheduled maintenance starts, the green LED is
turned off. To determine if a test call is still running, use the list isdn-testcall and
status isdn-testcall commands. A lit yellow LED on the Maintenance/Test circuit
pack also indicates that a test call is running.
There are two methods available to place an outgoing ISDN Trunk-side BRI trunk
test call:
1. The test call connection is established over the TDM Bus of the transmit
and receive sides of the ISDN Trunk-side BRI trunk to a data channel.
2. The test call connection is established over the TDM Bus of the transmit
and receive sides of the ISDN Trunk-side BRI trunk to a digital trunk testing
port on the Processor circuit pack. The Processor Digital Port generates a
pseudo bit stream.
A test is run periodically to check if the call is hung. If so, it gracefully tears down
the call to release the resources.
Synchronous Commands
You can demand a synchronous outgoing test call by using the following
maintenance commands:
test trunk trunk-group-no/member-no long [repeat number]
test board board-location long [repeat number]
test port port-location long [repeat number]
Whenever a circuit translates to an ISDN Trunk-side BRI trunk during a Long Test
Sequence, an outgoing test call is invoked, and the duration of the test call is 8.6
seconds. The outgoing ISDN Trunk-side BRI trunk test call is established over a
high speed data channel on the Processor circuit pack (DATA-BD). A bit error rate
greater than zero is reported as a failure to the Manager I terminal (MGRI). A
failure indicates the need to run further diagnostics.
Asynchronous Commands
NOTE:
Only one trunk can be tested in a given port network, until the test call is
canceled or completes.
1650
Issue 5 October 2002