ADC Release 3.1 User Manual page 477

TAP-100
Page 14 of 23
ALARM SEVERITY
MESSAGE
Physical Critical
Layer
Convergen
ce Protocol
Loss of
Frame
PLCP-Lof
Physical Information
Layer al Alert
Convergen
ce Protocol
Severely
Errored
Framing
Seconds
Threshold
Crossing
Alert
PLCP-
SEFSTca
Physical Information
Layer al Alert
Convergen
ce Protocol
Unavailabl
e Seconds
Threshold
Crossing
Alert
PLCP-
UASTca
Physical Minor
Layer
Convergen
ce Protocol
Yellow
Alarm
PLCP-
YellowAlar
m
1152700 Issue 1 February 2001 Section 2 Operations and Maintenance
Table 4-1. Alarm Identifications, continued
IMPACT DESCRIPTION
Service PLCP encoding problem at
Affecting the far end, or line
degradation.
Service PLCP severely errored
Degradation frame seconds threshold
crossing alert.
Service PLCP unavailable seconds
Degradation threshold crossing alert.
Installation PLCP yellow alarm.
Error Remote end has detected a
PLCP Loss of Frame
(LOF).
SUGGESTED COURSE OF ACTION
Check far end encoding and
line levels.
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.
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.
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)
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© 2000, ADC Telecommunications, Inc.