9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. VI-B-39
Trib n LOS
Loss of signal on a commissioned tributary. This is a critical alarm.
Probable Cause
The failure may be within the attached equipment, the trib cable, or the radio.
Recommended Actions
1. Check for alarms on trib-attached equipment, which may indicate loss of
signal input from this source.
2. Check the trib cable and connectors.
3. Check the configuration of the affected trib. Ensure correct line options are
selected.
4. Run a loop-back test on the affected trib using an external BER tester.
• If the test is OK, the problem is in the attached equipment or cabling.
• If the test fails, replace the DAC/IDU.
Additional Information
This alarm is raised at the affected end of the link only.
For an E1/DS1 trib, AIS will be inserted towards the TDM bus/radio, provided
the trib is ticked as commissioned in its CT plug-ins screen.
Trib n Output Failure
The output to the customer equipment has failed. This is a critical alarm.
Probable Cause
Output device or card error.
Recommended Actions
Withdraw the DAC, pause, then reinsert.
Replace the DAC.
Trib n Uncommissioned Traffic
Signal received on an uncommissioned tributary. This is a warning alarm.
Probable Cause
Traffic has been detected on an uncommissioned tributary. This indicates that the
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