User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-653EXP-INTF (Expansion Interface Circuit Pack)
10
Standby. When a problem arises on the Active pair, the Standby pair may be
called upon to take over and provide continuous service with stable calls being
preserved. The Expansion Interface circuit packs must be inserted into fixed
slots. The valid slots for Expansion Interface circuit packs are: 1A01, 1A02, 1B01,
1B02, 2A01, 2A02, 2B02, 2B03, 3A01, 3A02, 3B02, or 3B03. It is also a
requirement that the fiber cables be connected according to the following table:
NOTE:
If Expansion Interface circuit packs are connected in any other way, they
do not function properly.
The Active Expansion Interface Link may be selected by system technician via
the set expansion-link PCSS command, where PCSS is the address of either
Standby Expansion Interface circuit pack. System Technician may prevent the
system from switching Expansion Interface Links by using the busyout board
PCSS command, where PCSS is the address of either Standby Expansion
Interface circuit pack. These two commands are described later in greater detail
in the "Expansion Interface Link Switch Command" section (located at the end of
this EXP-INTF Maintenance documentation).
A G3MT terminal connected to an EPN [G3i] provides the same maintenance
and administrative capabilities as the local administration terminal, but at a
slower transmission speed. The EPN Maintenance circuit pack also provides
Emergency Transfer and environmental monitoring functions for the EPN.
The abbreviations have the following meanings:
■ PROC The TN773 Processor circuit pack (the Active TN773 Processor
circuit pack in a High or Critical Reliability system)
■ NETCON The SW-CTL portion of the Network Control circuit pack (the
Active Network Control circuit pack in a High or Critical Reliability system)
1. G3iV1.1-286 and G3iV2-386 only.
Table 10-189. Expansion Interface Circuit Pack Connections
EXP-INTF
in slot
connected to
EXP-INTF in
slot Description
1A01 2A01 Network 1 to Network 2
1B01 2B02 Network 1 to Network 2 (Duplicated Link)
1A02
1
3A01 Network 1 to Network 3
1B02
1
3B02 Network 1 to Network 3 (Duplicated Link)
2A02
1
3A02 Network 2 to Network 3
2B03
1
3B03 Network 2 to Network 3 (Duplicated Link)