User's Manual

ADCP-75-187 • Preliminary Issue 1B • November 2005 • Section 4: MAINTENANCE
Page 4-3
© 2005, ADC Telecommunications, Inc.
Table 4-1. 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 system is in the standby, normal, test, or
program 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
Yel low
Red
Indicates if the HU is normal, over temperature, if an
internal fault is detected, or if there is an equipment mis-
match.
The HU is normal.
The HU is over temperature or detects an internal fault.
The HU detects an internal fault or HU/RU band mismatch.
REMOTE UNIT
Green
Yel low
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 851–869
DRIVE 935–940
(Rear Access HU)
DRIVE
(Front Access HU)
Green
Yel low
Red
Indicates if the specified 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.
FWD/REV
(PORT 1/PORT 2)
Green
Red
Indicates if the reverse path optical signals from the RU
are normal, if errors are detected, or if the optical signal is
not detected.
The reverse path optical signals are normal.
Excessive errors (see Note) are detected in the reverse path
optical signals or the HU is not receiving a reverse path optical
signal.
Note: Excessive errors means the Bit Error Rate (BER) has exceeded 10
–6
(1 bit error per million bits).
Table 4-2. Remote Unit LED Indicator
INDICATOR COLOR DESCRIPTION
STATUS
Off
Red
Indicates if the RU is unpowered, normal, or if an internal
fault is detected.
The RU is unpowered or the RU is normal and no faults are
detected.
The RU detects an internal fault, excessive errors (see Note)
are detected in the forward path optical signals, or the RU is
not receiving a forward path optical signal.
Note: Excessive errors means the Bit Error Rate (BER) has exceeded 10
–6
(1 bit error per million bits).