Avaya Definity SI, Maintenance Manual, Page: 1062 / 2968

Maintenance Object Repair Procedures
555-233-123 10-276 Issue 4 May 2002
BRI Port Local LAN Loop Around Test (#618)
This test is destructive.
This test, which verifies the connectivity of a BRI port across the LAN Bus,
executes only if the port is out-of-service. The test aborts if calls associated with
the port are in-progress. Failures of this test indicate either on-board faults
associated with the BRI-PORT hardware on the circuit pack or problems with the
LAN Bus, which is used to form connectivity between the switch and the
BRI-PORT.
The dotted lines in Figure 10-7 show how a Loop Around Test is performed across
the Packet Bus for the D-channel.
Figure 10-7. Path of the BRI Port Local LAN Loop Around
BRI LINE
CIRCUIT
PACK
PACKET
INTERFACE
PACKET BUS
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