Severity Levels

Not Alarmed (NA)

AID Type

OC-3 line

OC-12 line

OC-48 line

OC-192 line

Date

Month/day/year that the condition was detected

Time

Hour:minute:second that the condition was detected

Probable Cause

WKSWPR-1 (Working facility/equipment switched to protection unit 1)

WKSWPR-2 (Working facility/equipment switched to protection unit 2)

Effect on Service

Standing Condition (SC)

Alarm Entity Type

OC3

OC12

OC48

OC192

Description

manual reference switch

Likely Cause

User selected Fault → Timing/Sync Protection Switch → System Timing Reference/Source Switch and the Switch Command Manual. The synchronization reference protection switching has been provisioned to revertive.

Visible Indication

Lighted ABN LED on the SYSCTL faceplate.

Action

Proceed to Procedure 5-94: Clear "manual reference switch" condition.