User Manual

ADCP-75-126 • Issue B • April 2002 • Section 5: Maintenance
Page 5-3
© 2002, ADC Telecommunications, Inc.
Table 5-1. Host Unit LED Indicators
INDICATOR COLOR DESCRIPTION
POWER
Green
Off
Indicates if the HU is powered or un-powered.
The DC power source is on.
The DC power source is off.
STANDBY
Green (blinking)
Yellow (blinking)
Red (blinking)
Off
Indicates if the HU is in the standby, normal, test, or pro-
gram load mode.
The HU is in the standby mode.
The HU is in the program load mode.
The HU is in the test mode.
The HU is in the normal mode.
HOST UNIT
Green
Yellow
Red
Indicates if the HU is normal, overheated, or faulty.
The HU is normal.
High temperature detected in HU.
Internal fault detected in the HU or HU/RU band mismatch.
REMOTE UNIT
Green
Yellow
Red
Indicates if an alarm is detected at the RU.
No alarms detected at the RU.
A minor alarm is detected at the RU.
A major alarm is detected at the RU.
DRIVE
Green
Yellow
Red
Indicates if the forward path RF signal level is normal,
above overdrive threshold, or below underdrive threshold.
The RF signal level is normal
The RF signal level is below the underdrive threshold.
The RF signal level is above the overdrive threshold.
PORT 1/PORT 2
Green
Red
Indicates if the reverse path optical signal received from
the RU is normal, if no signal is detected, or if errors are
detected.
The reverse path optical signal is normal.
No reverse path optical signal is received, excessive errors are
detected, or HU can’t communicate with the STM.
PORT 3
(diversity units
only)
Green
Yellow
Indicates if the diversity reverse path optical signal
received from the RU is normal, if no signal is detected, or
if errors are detected.
The diversity reverse path optical signal is normal.
No diversity reverse path optical signal is received or exces-
sive errors are detected.