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Communication Manager Maintenance-Object Repair Procedures
1176 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
EXP-INTF (Expansion Interface Circuit Pack)
S8700 | 8710 / S8500
!
WARNING:
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 LAPD 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 1183 in this section.
Refer also to Avaya MultiVantage Solutions Installation and Maintenance for Survivable Remote
EPN, 555-233-121.
Following this introductory description of the Expansion Interface (EI) circuit pack are sections
on the following topics:
● EI In-Service Mechanism on page 1181
● Survivable Remote EPN on page 1182
● LEDs on page 1183
● EI and Tone-Clock Interactions on page 1186
● Replacing an EI Circuit Pack—Unduplicated PNC on page 1189
● Replacing an EI Circuit Pack— Duplicated PNC on page 1190
● Expansion Interface Manual Loop-Back Procedure on page 1191
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-switched connections between endpoints residing in separate PNs. EI
circuit packs are connected via optical fiber links. An EI can be connected to:
● Another EI, in a direct-connect configuration
● A DS1 converter in a DS1 converter complex, used to remote a PN
● A Switch Node Interface (SNI), in a center stage switch (CSS) configuration
● A survivable remote EPN (SREPN)
MO Name in
Alarm Log
Alarm
Level
Initial SAT Command to
Run
Full Name of MO
EXP-INTF MAJ test board location s Expansion Interface circuit pack
EXP-INTF MIN test board location s Expansion Interface circuit pack
EXP-INTF WRN test board location s Expansion Interface circuit pack