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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-165BRI-PORT (ISDN-BRI Port), ABRI-PORT (ASAI ISDN-BRI Port)
10
NOTE:
The NPE Crosstalk Test and the BRI Port Local TDM Loop Around Test are
not executed for ABRI-PORT/ATT-PORT/LGATE-PT/ATTE-PT.
NPE Crosstalk Test (#617)
This test is destructive.
One or more NPEs reside on each circuit pack with a TDM Bus interface. The
NPE controls port connectivity and gain and provides conferencing functions on
a per-port basis. The NPE Crosstalk Test verifies that this port’s NPE channel
talks on the selected time slot and never crosses over to time slots reserved for
other connections. If the NPE is not working correctly, one-way and noisy
connections may be observed. This test is part of a port’s Long Test Sequence
and takes approximately 20 to 30 seconds to complete. Crosstalk testing is
performed on both B-channels (B1 and B2) associated with a BRI port. If this test
fails on either channel, any endpoints connected to the port are taken
out-of-service.
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 AT&T adjuncts.
1. D = Destructive; ND = Nondestructive
Layer 1 Transmission Error Counter Test
(#624)
XND
Receive FIFO Overflow Error Counter Test
(#625)
XND
Clear Error Counters (#270) X X ND
Order of Investigation
Short Test
Sequence
Long
Test
Sequence D/ND
1