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1152700• Issue 1 • February 2001 • Section 2 Operations and Maintenance
Page 2-433
© 2000, ADC Telecommunications, Inc.
TAP-100
Page 14 of 23
Table 4-1. Alarm Identifications, continued
ALARM
MESSAGE
SEVERITY IMPACT DESCRIPTION SUGGESTED COURSE OF ACTION
Physical
Layer
Convergen
ce Protocol
Loss of
Frame
PLCP-Lof
Critical Service
Affecting
PLCP encoding problem at
the far end, or line
degradation.
Check far end encoding and
line levels.
Physical
Layer
Convergen
ce Protocol
Severely
Errored
Framing
Seconds
Threshold
Crossing
Alert
PLCP-
SEFSTca
Information
al Alert
Service
Degradation
PLCP severely errored
frame seconds threshold
crossing alert.
The TCAs signal a problem
with the integrity of the PLCP
overhead in the DS3 frame.
The most probable cause is a
mismatch between the
transmitter and the receiver.
Examine the physical circuit to
determine
if there are any
impairments.
Physical
Layer
Convergen
ce Protocol
Unavailabl
e Seconds
Threshold
Crossing
Alert
PLCP-
UASTca
Information
al Alert
Service
Degradation
PLCP unavailable seconds
threshold crossing alert.
An error rate of 1.6E-5 or
worse for a period of time
more than ten seconds.
Examine the physical circuit to
determine
if there are any
impairments.
Physical
Layer
Convergen
ce Protocol
Yellow
Alarm
PLCP-
YellowAlar
m
Minor Installation
Error
PLCP yellow alarm.
Remote end has detected a
PLCP Loss of Frame
(LOF).
PLCP Yellow alarm indicates
to the near end a problem with
the framing in the PLCP
header at the far end.Examine
the physical circuit to
determine
if there are any
impairments.
(continued)