Lucent Technologies DDM-2000 OC-3 User Manual

TAP-103: Trouble Clearing 363-206-285
Page 1 of 4 Issue 2, February 2000
DDM-2000 OC-3 MULTIPLEXER
Clear Multiple Failure
1. !
CAUTION:
Although the FAULT LEDs may be lighted or flashing on an OLIU , service
may be interrupted if the
OLIU is removed. The OLIU smaybein
unidirectional switching mode and transmitting on one
OLIU while
receiving on the other. The state of the switch mode must be analyzed
before removing an
OLIU .
NOTE:
A multiple failure condition exists when a service circuit pack and its
associated protection circuit pack have failed, when two service
DS1/DS1P circuit packs in the same group have failed, or when the
switch mode is inhibited or locked and a failure occurs on a service circuit
pack.
Is the FAULT LED on an OLIU lighted (CP failed)orflashing(inc. OC3
LOS or inc. OC12 LOS, etc.)?
If YES, then do TAP-111 if linear extension.
Do TAP-119 if ring configuration.
If NO, then continue with Step 2.
2. Are the FAULT LEDs on both a service and protection circuit pack of the same
type lighted (not flashing) (CP failed)?
If YES, then continue with Step 3.
If NO, then proceed to Step 7.
3.
!
CAUTION:
Replacement circuit pack may have option switches which must be
properly set before the circuit pack is installed.
Replace the service circuit pack with the lighted FAULT LED.
Reference: DLP-523
4. Is the FAULT LED on the circuit pack just replaced off?
If YES, then continue with Step 5.
If NO, then do TAP-106.
TAP-111
TAP-119
DLP-523
TAP-106

Lucent Technologies DDM-2000 OC-3 Specifications

General

Brand	Lucent Technologies
Model	DDM-2000 OC-3
Category	Multiplexer
Language	English