Maintenance-Object Repair Procedures
555-233-143
8-762 Issue 1 May 2002
EXP-INTF (Expansion Interface Circuit
Pack)
!
WARNING:
If the Expansion Interface (EI) circuit pack you are troubleshooting is
associated with a Survivable Remote EPN (SREPN), before the SREPN can
be returned to normal service, every LAP-D EI link problem must be cleared,
and the SREPN slide switch on the TN2301 (located in the SREPN carrier)
must be manually set to the normal position. See ‘‘Restoring Normal
Service to the SREPN’’ on page 8-770 in this section.
Refer also to DEFINITY ECS Installation and Maintenance for Survivable Remote
EPN, Issue 1, 555-230-102.
Following this introductory description of the Expansion Interface (EI) circuit pack
are sections on the following topics:
■ ‘‘EI In-Service Mechanism’’
■ ‘‘Survivable Remote EPN’’
■ ‘‘LEDs’’
■ ‘‘EI and Tone-Clock Interactions’’
■ ‘‘Replacing an EI Circuit Pack—Unduplicated PNC’’
■ ‘‘Replacing an EI Circuit Pack— Duplicated PNC’’
■ ‘‘Expansion Interface Manual Loop-Back Procedure’’
MO’s Name (in
Alarm Log)
Alarm
Level
Initial SAT Command
to Run
1
1. UU is the universal cabinet number (1–64 for ATM PNC, 1–44 for CSS PNC). C is the carrier designation (A,
B, C, D, or E). SS is the number of the slot where the circuit pack resides (01–21).
Full Name of MO
EXP-INTF MAJOR test board UUCSS s Expansion Interface circuit pack
EXP-INTF MINOR test board UUCSS s Expansion Interface circuit pack
EXP-INTF WARNING test board UUCSS s Expansion Interface circuit pack
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