Alcatel-Lucent 1643 AMS Operation Manual page 40

Alarm messages
1.5 Mbit/s Loss of input signal
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Alarm identifier
Information
Alarm category
ASAP
Alarm severity
(default setting)
Reporting state
(default setting)
Local indications
Cause
Actions
Note(s)
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1-20
E11cLOS
There is no incoming signal on a 1.5 Mbit/s tributary port. This is detected by
the absence of transitions in the signal.
Transmission
pdhPS
Prompt
Reported
The red fault LED is flashing.
Possible causes are:
•
Interconnecting cabling contacts have a problem.
•
Receiver fault in the DS1 unit.
•
Fault in the transmitting equipment (for example wrong configuration of the
output power level).
•
Discontinuity in the intermediate cabling.
•
Erroneous routing of intermediate cabling.
•
Check tributary connections between the DS1 unit, the connecting panel, and
the DDF (Digital Distribution Frame).
•
Check the tributary receiver port of the DS1 unit by looping the data at the
DDF.
•
Check the transmitting equipment, including the configuration of the output
power level.
•
Check intermediate cabling.
Depending on the provisioning:
A Tributary Timing Reference Switch Request is generated to switch over to
another timing source.
Alcatel-Lucent - Proprietary
See notice on first page
365-312-803R7.2
Issue 4, May 2007