DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-318BRI-PORT (ISDN-BRI Port), ABRI-PORT (ASAI ISDN-BRI Port)]
9
BRI Port Local TDM Loop Around Test (#619)
This test is destructive
.
This test verifies the connectivity of a BRI port across the TDM Bus. It aborts if
calls associated with the port are in progress. Failure of this test indicates an
on-board fault associated with the port hardware on the circuit pack.
This Loop Around Test runs a series of individual tests on the two B-channels (B1
and B2) associated with the port. It is a collection of the following:
■ A Loop Around Test across the TDM Bus for B1.
■ A Conference Circuit Test for B1.
■ A Loop Around Test across the TDM Bus for B2.
■ A Conference Circuit Test for B2.
The tests are run in the above order. If one fails, the remaining tests in the
sequence are not executed. An error code is returned at that point.
This test is not executed for ABRI-PORT/ATT-PORT/LGATE-PT/ATTE-PT because
the B-channels associated with the port are not used by ASAI or Lucent adjuncts.
The dotted lines in Figure 9-15
show how a Loop Around Test is performed for the
B-channels. The figure shows a terminal connected to a BRI line board using a
TN556. If a TN2198 is used the terminal would be connected to a NT1, and the
NT1 to the BRI board.
