User manual

Wide Bank 28 DS3 - Release 2.4 July 2004 7-5
Diagnostics & Troubleshooting
LED Test and Status Indicators
Controller Status (CS) LED
There is a status LED for each Controller. In a protected redundant system with two Controllers, the
active (working) Controller status LED is green and the standby (protection) Controller status LED
is off.
High Speed (HS) Line Condition LED
This LED shows the condition of the high speed DS3 line interface.
State Meaning
GREEN Normal Operation
RED Alarm Condition
RED FLASHING Self-Test Fail
YELLOW Network Loopback
OFF Standby
State Meaning
GREEN Normal Operation
RED Loss of Signal (LOS)
RED FLASHING LOF and/or AIS received
YELLOW RAI Alarm
YELLOW FLASHING Line Code Violation or Frame Bit Errors