Avaya Definity SI Maintenance Manual page 1815

MAINT (EPN Maintenance Circuit Pack)
Table 10-372. TEST #229 Serial Channel Local Loop Around Test — Continued
Error
Code Result
FAIL
PASS
555-233-123
Test
The on-board circuitry associated with the Standby serial link is
defective. Since the EPN Maintenance circuit pack reported this
failure, the on-board circuitry associated with the Active serial link
is functional.
1. This test checks the circuitry on the EPN Maintenance circuit
pack associated with the Standby Expansion Interface link.
In a switch without duplicated Expansion Links, current
service is not affected because the circuitry failing is not
being used. Nevertheless, a Minor alarm remains in the
Alarm Log against MAINT. Therefore, the EPN
Maintenance circuit pack must be replaced.
In a switch with duplicated Expansion Links, service is not
affected as long as you DO NOT SWITCH LINKS;
otherwise, the connection to the EPN Maintenance circuit
pack is lost. Losing the EPN Maintenance circuit pack
connection means loss of the EPN Manager I (G1) or
G3MT and EPN Environment maintenance. If an
Expansion Links switch does occur, the software probably
switches the links back, based on the relative health of
each link. The EPN Maintenance circuit pack must be
replaced to correct this problem.
The on-board circuitry associated with both Expansion Interface
circuit pack serial links is good. If there is still a problem
communicating with the EPN Maintenance circuit pack, check the
following:
1. The cable comprising the serial link (B carrier Expansion
Interface circuit pack to EPN Maintenance circuit pack only)
may be defective.
2. The EPN Maintenance circuit pack may actually be
defective.
NOTE:
This test may not be 100 percent accurate.
3. The Expansion Interface circuit pack on the Standby link may
be defective.
Description/Recommendation
Continued on next page
Issue 4 May 2002 10-1029