Uneq; Wkswbk - Fujitsu FLM 150 ADM Maintenance And Trouble Clearing

Maintenance and Trouble Clearing
FJTU-320-515-480
3.77

UNEQ

Table 3-75: UNEQ (Unequipped Code Signal Label Received)—Alarm Event
AID
Direction
Type
STS1 TRMT/RCV
VT1 RCV
3.78

WKSWBK

Condition code that reports the switching from the Protect unit back to the
Working unit in the FLM 150 ADM.
Table 3-76: WKSWBK (Working Facility/Equipment Switched Back to Working)—
AID
Direction
Type
EQPT NA
OC3
OVTG
STS1
VT1
Issue 9, May 1999
Probable Cause
This alarm occurs in path switched
rings only. It is detected as the
signal is dropped:
• An STS-1 cross-connect has been
deleted either at the local node
or at an upstream node. A
deleted cross-connect anywhere
along the SONET path could
cause this alarm.
• The upstream tributary facility
where the signal is added to the
ring has been deleted.
Transient Condition
Probable Cause
• The restoration of
signal to Working
unit after an LOS or
degraded condition
• Working unit plugged
in after it had been
removed
• Faulty Working unit
repaired
FNC and FNC Customer Use Only
Suggested Corrective Action
• Retrieve the cross-connects along the
SONET path for this circuit. Enter any
cross-connect that is missing. The alarm
will clear when all needed cross-connects
have been entered.
• If no circuit is to be carried on the facility
reporting the alarm, the alarm can be
cleared by setting PSWOPT = N for the
STS drop reporting the alarm.
• Retrieve the facility state where the
circuit is added to the ring. Enter the
facility if it is out of service (OOS).
Suggested Corrective Action
No action required. The FLM 150 ADM has two modes
of protective switching, revertive and nonrevertive. In
nonrevertive switching, switching is performed
manually. In revertive switching, switching will occur
after normal conditions have been restored to the
Working unit.
3.77: UNEQ
Vol. ll, Page 480.3-48