Filter
Top Products
DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-605EXP-INTF (Expansion Interface Circuit Pack)
10
Replace the Active Tone-Clock circuit pack on this network. In a
High or Critical Reliability system, the Active Tone-Clock is the
Tone-Clock circuit pack whose yellow LED is: 1) blinking and 2)
blinking slower if both Tone-Clocks have blinking yellow LEDs. If
the Expansion Interface Link(s) comes up after replacing this
Tone-Clock circuit pack, then this Tone-Clock circuit pack should
be replaced as soon as possible. See Warning.
!
WARNING:
If the defective Tone-Clock circuit pack is left as the Standby
Tone-Clock, then a scheduled Tone-Clock switch causes the same
EPN to go out-of-service again.
If replacing the Active Tone-Clock did not bring up the Expansion
Interface Link(s), then this Tone-Clock circuit pack is not the source
of the problem.
c. On a standard system in which the PPN contains the suspect
Tone-Clock circuit pack:
Replace the PPN Tone-Clock circuit pack at a time when bringing
down the system is most convenient to the customer.
!
WARNING:
Replacing the PPN Tone-Clock circuit pack stops call processing on
that network and also brings down stable calls. This action
eventually causes a Reset System 2 (Cold 2 restart).
If replacing the Tone-Clock circuit pack restores the Expansion
Interface Link(s), then the Tone-Clock circuit pack is defective and
should be replaced. Otherwise, the problem is not with the PPN
Tone-Clock circuit pack.
Expansion Interface Manual Loop Back Procedure
This procedure is to be used when an Expansion Interface circuit pack cannot be
tested by software. This is usually when the Expansion Interface circuit pack is in
the EPN and the EPN is down. A spare length of fiber jumper cable is required for
this procedure.
If this procedure is run on both Expansion Interface circuit packs of a link, and
both check out fine, then the failure is most likely in the fiber itself if neither
Expansion Interface circuit pack is busied out, but the link remains inactive.
1. Busyout the Expansion Interface circuit pack using the busyout board
PCSS command.