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TAP-103
: Trouble Clearing
Page 1 of 4
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 s may be in
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) or flashing (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.
Clear Multiple Failure
DDM-2000 OC-3 M
Issue 2, February 2000
ULTIPLEXER
363-206-285
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