User manual

DEFINITY ECS Release 8.2 Maintenance for R8.2csi 555-233-119 Issue 1
April 2000
Maintenance Objects
3-274BRI-PORT (ISDN-BRI Port), ABRI-PORT (ASAI ISDN-BRI Port)
3
System Technician-Demanded Tests: Descriptions
and Error Codes
Always investigate tests in the order presented in the following tables when
inspecting errors in the system. By clearing error codes associated with the
NPE
Crosstalk Test
, for example, you may also clear errors generated from other tests
in the testing sequence.
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 Lucent adjuncts.
Order of Investigation
Short Test
Sequence
Long Test
Sequence D/ND
1
1. D = Destructive; ND = Nondestructive
NPE Crosstalk Test (#617) X D
BRI Port Local LAN Loop Around Test (#618) X D
BRI Port Local TDM Loop Around Test (#619) X D
Electronic Power Feed Restoral Test (#620) X X ND
Level 1 Status Inquiry Test (#621) X X ND
Electronic Power Feed Inquiry Test (#622) X X ND
CRC Error Counter Test (#623) X ND
Layer 1 Transmission Error Counter Test (#624) X ND
Receive FIFO Overflow Error Counter Test (#625) X ND
Clear Error Counters (#270) X X ND