User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Reliability Systems: A Maintenance Aid
Page 6-19Repair Procedures for High and Critical Reliability
6
Object Repair Procedures’’ for the procedure to replace the Tone-Clock circuit
pack.
!
CAUTION:
When circuit packs in the Active SPE are to be replaced, this section
provides procedures for performing an SPE-interchange to place the circuit
packs in the Standby SPE mode. SPE circuit packs should never be
replaced while they are located in the Active SPE.
Use this section when:
1. Defective (that is, alarmed) Active or Standby SPE circuit packs are to be
replaced. The procedure begins at the ‘‘
Replacing Defective SPE Circuit
Packs’’ section. Ignore the ‘‘Upgrading SPE Circuit Packs’’ section, as it
does not apply to replacing defective Standby SPE circuit packs.
2. Healthy Standby SPE circuit packs are to be upgraded. The procedure
begins at the ‘‘
Upgrading SPE Circuit Packs’’ section. Ignore the
‘‘
Replacing Defective SPE Circuit Packs’’ as it does not apply to
upgrading Standby SPE circuit packs.
The ‘‘
Circuit Pack Replacement Procedure’’ and ‘‘Additional Tests for Replaced
DATA-CHL, PKT-CTRL, and PROCR Circuit Packs’’ sections apply to both
situations but should be referred to only after reading the appropriate sections
as instructed previously.
Replacing Defective SPE Circuit Packs
Determine that software is running by looking at the G3MT and verifying that it
does not have either the “SPE DOWN MODE” or the “Duplication Interface -
Processing Element Communication Down” message displayed.
Software Not Running
If system software is not running or if it stops running at any point during this
procedure, the suggested order of Processor Complex circuit packs to replace
in an attempt to fix the SPE down problem is:
■ Processor Circuit Pack (TN790)
■ Network Control Circuit Pack (TN777[B])
■ Packet Control circuit pack (TN778)
■ Duplication Interface circuit pack (TN772)
■ Processor Interface circuit pack (TN765)