Troubleshooting guide

Section 8, User Interface Guide - TAP-100, MX2820 Troubleshooting Guide
61186003L1-1D 8-5
Table 8-2. MX2820 MUX LED Descriptions
LED State Description
ACT
Solid Green
Alternating Green/Amber
Solid Red
Solid Amber
Alternating Red/Amber
Flashing Red
Normal operation
Normal operation but console is open
Self-test failed
Software update in progress
Self-test failed and console open
MUX Module has failed
ALM
Solid Green
Solid Red
Flashing Red
No critical, major, or minor alarms
Major or minor alarm in progress
Critical alarm in progress
DS3/
NET
STAT
Solid Green
Solid Red
Flashing Red
One-second Red
Alternating Red/Green
Normal (DS3 okay)
AIS, OOF, RAI, Idle alarms
DS3 LOS or DS3 failure (critical)
A single DS3 line code violation or burst of DS3 line code viola-
tions just occurred
DS3 XCV threshold exceeded
DS3/
NET
TEST
Off
Solid Amber
Flashing Amber
No DS3 tests in progress
Locally-originated test
Remote-originated test
DS1
STAT
Off
Solid Green
Solid Red
Flashing Red
One-second Red
Alternating Red/Green
All DS1s are disabled
Enabled DS1s normal (all okay)
Non-critical DS1 alarm in progress
DS1 LOS on some enabled line (critical DS1 alarm; non-critical
system alarm)
Single code violation or burst of code violations just occurred in
some RX DS1
DS1 XCV threshold exceeded
DS1
TEST
Off
Solid Amber
Flashing Amber
No DS1 tests in progress
Locally-originated test
Remote-originated test