DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1384SNC-BD (Switch Node Clock Circuit Pack)
9
database. Once the firmware failure database is cleared, the failure audit test
(#777) will pass. If problems still exist, the firmware will increment its error
counters and the failure audit test will begin failing again.
This command should not be used as a replacement for the repair procedures
associated with the hardware error log entries. This command may be useful if a
problem has been fixed and off-board alarms associated with the problem are
still active.
Replacing SNC Circuit Packs
!
WARNING:
Do not power down a Switch Node carrier to replace a circuit pack.
Replacing an SNC on a system with unduplicated SNCs disrupts service.
Standard Reliability System (Simplex SPE, PNC
and SNCs)
This procedure is destructive. Any links through the switch node carrier will
go down.
1. Pull out the SNC circuit pack to be replaced.
2. Insert a new SNC circuit pack.
3. Wait for the SNC to reset. (The red and green LEDs light and then go out.
The yellow LED should be on solid.)
4.
Test alarm long clear
category
exp-intf
.
Do not busyout the Expansion
Interface circuit packs.
5. Wait 5 minutes for SNI-BD, SNI-PEER, FIBER-LK, and DS1 CONV-BD
alarms to clear, or enter
clear firmware-counters
.
High Reliability System (Duplicated SPE and
SNCs, Simplex PNC)
This procedure is non-destructive.
1. If the SNC circuit pack to be replaced is the active SNC in the switch node
carrier (yellow LED is on solid), first set the standby SNC to active via the
set switch-node-clock command.
2. When the SNC circuit pack is in standby mode (yellow LED is off), pull out
the SNC circuit pack to be replaced.
3. Insert a new SNC circuit pack.
4. Wait for the SNC to reset. (The red and green LEDs light and then go out.)
The yellow LED should be off since the SNC circuit pack is in standby
mode.
