User's Manual

ADCP-75-130 • Issue 3C • August 2006
Page 43
© 2006, ADC Telecommunications, Inc.
Table 9. Digital Expansion Unit LED Indicators
INDICATOR COLOR DESCRIPTION
UNIT
LED
Green
Yellow
Red
Off
Indicates when the DEU is normal or faulty.
DEU in normal state, no faults detected.
DEU high temperature fault detected. (see Note)
DEU internal fault detected. (see Note)
AC power off to DEU or DEU internal fault.
HOST PORT
LED
Green
Red
(blinking)
Off
Indicates when the optical inputs from the DHU or supporting
DEU are normal or lost.
DHU or supporting DEU in normal state, no faults detected.
No forward path optical signal detected from DHU or supporting DEU or
excessive forward path errors detected from DHU or supporting DEU.
(see Note).
DEU internal fault.
PORT 1–6
OK/NOK
LEDs
Green
Yellow
Red
(steady)
Red
(blinking)
Off
Indicates if any connected DEU or DRU is normal or faulty or if the
optical inputs from any connected DEU or DRU are normal or lost.
DRU or remote DEU in normal state, no faults detected.
High temperature fault detected in connected DEU. (see Note)
Fault detected in a connected DEU or DRU. (see Note)
No reverse path optical signal detected from a connected DEU or DRU or
excessive reverse path errors detected from a connected DEU or DRU.
Port disabled (via front panel switch) or DEU internal fault.
Note: Detection of any fault will generate an alarm. A high temperature fault will generate a minor alarm
(yellow LED). All other types of faults will generate a major alarm (red LED).
Table 10. Digital Remote Unit LED Indicator
INDICATOR COLOR DESCRIPTION
STATUS
LED
Green
Red
(steady)
Red
(blinking)
Off
Indicates if the DRU is normal or faulty or if the forward path optical
inputs to the DRU are normal or lost.
DRU in normal state, no faults detected.
DRU internal fault detected. (See Note)
No forward path optical signal from the DHU or DEU detected.
DC power off to DRU or DRU internal fault.
Note: Detection of any fault will generate an alarm. A high temperature fault will generate
a minor alarm (yellow LED). All other types of faults will generate a major alarm (red LED).