9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. VI-B-35
Traffic Path Down
The radio path is down. True for non-protected and for protected/diversity
configurations. This is a critical alarm.
Probable Cause
Path loss or equipment malfunction.
Recommended Actions
1. Check for path loss.
• Traffic will be affected in both directions.
• A complete path loss will almost invariably be preceded by a low RSL and
BER alarms; check CT History and Event Browser screens and associated
event help.
2. Check equipment.
• An equipment related path loss should be signalled by alarms from the
ODU, RAC, or NCC.
• Such alarms may be at the local or remote end and may be one-way or
both-way traffic affecting.
Protection Cable Unplugged
Unable to detect the protection cable. This is a warning alarm.
Probable Cause
Cable not present/disconnected.
Recommended Actions
Check/install the protection cable.
DAC Alarms
LIU Failure
No communications with the LIU (line interface unit). This is a critical alarm.
Probable Cause
Equipment malfunction.
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