DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-780EXP-INTF (Expansion Interface Circuit Pack)
9
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, all LAPD EI link problems must be cleared,
and the SREPN slide switch on the TN2301 (located in the SRPPN carrier)
must be
manually
set to the normal position. See ‘‘Restoring Normal
Service to the SREPN’’ on page 9-788 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—Simplex PNC’’
■ ‘‘Replacing an EI Circuit Pack— Duplicated PNC’’
■ ‘‘Expansion Interface Manual Loopback Procedure’’
The TN570 or the TN776 Expansion Interface (EI) Circuit Pack provides a TDM
and Packet bus to fiber interface for the communication of signaling information,
circuit switched connections, and packet switch connections between endpoints
residing in separate port networks. EI Circuit Packs are located in the Processor
Port Network (PPN) or in Expansion Port Networks (EPNs) and are connected via
optical fiber links. An EI can be connected to:
■ Another EI (direct-connect configuration)
MO Name (in
Alarm Log)
Alarm
Level
Initial Command to
Run
1
1.
UU
is the universal cabinet number (1 for PPN, 2 - 44 for EPNs).
C
is the carrier designation (A,
B, C, D, or E).
SS
is the number of the slot in which the circuit pack resides (01 to 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
