User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
3
. Issue 1.6. Date3/2/99
Page 21 of 22 © Copyright Airspan Communications Corporation 1999
2.1.16. Ringer Failure
Message: ‘RingerFail’
Source: ST CRU.
Fault Condition: No ringer output at CRU.
Likely Cause: CRU malfunction.
Consequential Effect: No Ringing to NTU
Repair Actions: Check that the problem is not in the phone by attaching a known
good phone to the circuit.
If ‘Ringer Fail’ change CRU (refer to Detailed Level Procedures
DLP-016 to DLP-020).