Repair Procedures for High and Critical Reliability
Issue 4 May 2002
6-21 555-233-123
Repair Procedures for High and
Critical Reliability
This section describes the procedure for installing or replacing Standby SPE
circuit packs. These circuit packs are:
■ Processor Circuit Pack
■ Network/Packet Control Circuit Pack
■ Processor Interface circuit pack(s)
■ Duplication Interface circuit pack
NOTE:
If you are replacing the Processor Circuit Pack, you need to obtain a new
license file.
This procedure does not apply to the TN768 or TN780 Tone-Clock circuit pack.
Refer to ‘TONE-BD”, “TONE-PT”, or “TDM-CLK” in Chapter 10, ‘‘Maintenance
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.
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