365-575-102 TroubleClearing:
Issue 8.0, July 2002 Page 1 of 4
TAP-111
Clear ‘Circuit Pack Failure’
Overview: This procedure is used to replace a circuit pack with a lighted FAULT
LED in response to one of these indicated failures:
DS3 INTFC failure REGENR failure
LNCTL failure STS1E INTFC failure
LSSW failure TG3 failure
OC3 INTFC failure IS3 INTFC failure
OC12 INTFC failure TOHCTL failure
OHCTL failure TRMTR failure.
RCVR failure
!
CAUTION:
A potential service interruption can be avoided for DS3, STS1E, OC3, IS3,
OC12, TRMTR, RCVR, or TG3 circuit packs by following this instruction. After a
replacement circuit pack has been inserted, the FAULT LED should go out
within 35 seconds. If the FAULT LED remains lighted after the 35 seconds,
immediately remove the replacement circuit pack before 110 seconds elapses.
1. From a failure condition above, identify the appropriate shelf using Table A:
Table A - Shelf and Associated Circuit Packs
Failed Circuit
Pack Shelf
DS3
LSSW Low Speed Shelf - Complementary
OC3 or
STS1E Low Speed Shelf - System Controller
IS3
OC12
TG3
TOHCTL
LNCTL High Speed Shelf
OHCTL or
RCVR Enhanced High Speed Shelf
TRMTR
REGENR Repeater Bay/Shelf
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