SDSL Loss of input signal
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Alarm identifier
SDSLcLOS
Information There is no incoming signal on the SHDSL port. This is detected by the
absence of transitions in the signal, that is, only zeros are received.
Alarm category Transmission
ASAP sdsl
Alarm severity
(default setting)
Prompt
Reporting state
(default setting)
Reported
Local indications –
Cause The alarm was generated because of:
• Interconnecting cabling contacts have a problem.
• Receiver fault in indicated tributary unit.
• Transmitter fault in the upstream equipment (not the Transmission System).
• Discontinuity in the intermediate cabling.
• Erroneous routing of intermediate cabling.
Actions Check connections between the indicated tributary unit, the connecting panel,
and the Digital Distribution Frame (DDF).
Check the tributary receiver port of the indicated tributary unit by looping the
data at the DDF.
Check upstream equipment (not part of the transmission system).
Check intermediate cabling.
Note(s) Depending on the provisioning:
A Tributary Timing Reference Switch Request is generated to switch over to
another timing source.
The remote alarm indication (Remote Defect Indicator) is activated towards the
upstream equipment.
Alarm messages
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1-128
Alcatel-Lucent - Proprietary
See notice on first page
365-312-803R7.2
Issue 4, May 2007
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