SHDSL Network Termination Unit embedded operations
channel failure
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Alarm identifier
NTUcEOCF
Information No communication is possible between the LTU and the NTU.
Alarm category Equipment
ASAP sdsl
Alarm severity
(default setting)
Deferred
Reporting state
(default setting)
Reported
Local indications –
Cause After three tries, no response on a configuration command has been received
from the NTU.
Actions Verify that the correct software image is running on the NTU. If this is not the
case, then download a suitable software image to the NTU, and perform a reset
in order to activate this software image.
If a suitable software image is running on the NTU, then reset the NTU, or
initiate a rediscovery of the SHDSL link, or shortly interrupt the SHDSL link.
EOC communication failures
There is no mechanism at the EOC link layer to guarantee delivery of a message,
except that each message requires at least one prescribed reply message. Reception of
the expected response(s) can be interpreted as a successful completion of an
EOC/EOC-ext. message exchange.
However, in case the expected response(s) are not received, two categories of EOC
communication failures can be differentiated:
• A missing response (no response/confirmation at all, after three tries, while the
SHDSL line itself is operational) indicates a complete break-down of the
communication, leading to an “Embedded operations channel failure” (EOCF)
alarm.
• An invalid response suggests that a configuration command has not been executed.
As a consequence, the configuration stored in the management information base
(MIB) on the LTU and the actual configuration of the connected SHDSL device
might differ. An invalid response leads to a “Configuration command incomplete”
(CNC) alarm.
Alarm messages
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Alcatel-Lucent - Proprietary
See notice on first page
365-312-803R7.2
Issue 4, May 2007
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