Aviat Networks ECLIPSE EDGE, User Manual

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14 Aviat Networks
Probable Cause
Equipment malfunction.
Recommended Actions
1. Check for other alarms, which may indicate a general loss of communications with
the ODU.
2. Check the ODU cable and connectors.
3. If this is the only alarm, and it has been active for at least 5 minutes, reboot (power
off, pause, power on). If the alarm remains, replace the ODU.
Remote Communications Failure
Cannot establish communications with the remote terminal. This is a major alarm.
Probable Cause
Path loss or equipment malfunction.
Recommended Actions
Check for other alarms:
• If Demodulator Not Locked and Rx path failure and path warning alarms are active,
an Rx path or remote Tx failure is indicated.
• If Demodulator Not Locked is not active (traffic is not affected), a process or
component failure in the radio overhead is indicated, which may be at the local or
remote end, and may also be causing loss of NMS, Auxiliary channels, and Alarm I/
O over the link. The problem may be one-way or both-way affecting.
• If there are no traffic affecting path alarms, check NMS operation and ODU alarms:
• If NMS is lost to the remote end, loss of the overhead channel is indicated.
• If an AUX plug-in is configured for the link, check the Auxiliary Channel Clock Fail
alarm(s). If active, it also indicates loss of the overhead channel.
• If there are no RAC/Radio or ODU alarms to indicate a local process or component
failure, check alarms at the remote site.
• Check to see if the communications failure is a both-way or one-way problem. If
both-way, the problem is more likely to be within an IDU. If one-way the problem is
more likely to be within one of the ODUs or RAC/Radios at the mux (Tx) or demux
(Rx) stages.
Additional Information
The Remote Communications Failure alarm signals that internal communication
between link ends is lost. This communication is carried in the overhead channel,
which also carries NMS, Auxiliary channels and Alarm I/O. The alarm is triggered
from the IDU.
RX Synthesiser Not Locked
Receiver not on frequency. This is a critical alarm.
Probable Cause
Equipment malfunction.
Recommended Actions
Replace the ODU.