1.5 Mbit/s Loss of input signal
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Alarm identifier
E11cLOS
Information
There is no incoming signal on a 1.5 Mbit/s tributary port. This is detected by
the absence of transitions in the signal.
Alarm category
Transmission
ASAP
pdhPS
Alarm severity
(default setting)
Prompt
Reporting state
(default setting)
Reported
Local indications
The red fault LED is flashing.
Cause
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.
Actions
•
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.
Note(s)
Depending on the provisioning:
A Tributary Timing Reference Switch Request is generated to switch over to
another timing source.
Alarm messages
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1-20
Alcatel-Lucent - Proprietary
See notice on first page
365-312-803R7.2
Issue 4, May 2007
Содержание 1643 AM
Страница 346: ......