User's Manual

5-10
Figure 5-5 Troubleshooting OC3 Radio XMT Alarm
A B
TRANSMITTER
Transmitter Fault
Transmitter On Line
RF Common Loss
PA Temperatore
PA RF Power
Transmitter RF Power
ATPC High Power
ATPC Timeout
OC3 Input Online
OC3 LOS
OC3 LOF
OC3 AIS-L Detect
OC3 Degrade
STATUS
Monday, April 09, 2001 1:58:29 PM
LMW-5034-sm
05/17/03
SEE DS1/E1
XMT ALARMS,
FIG. 5-3
SUMMARY ALARM
FOR XMTR
OC3 I/O INTFC CANNOT RECOVER FRAMING
FROM INCOMING OC3 SIGNAL OR THERE IS
NO OPTICAL INPUT SIGNAL.
IS OC3 AIS-L Detect ALARM ON?
YES, TROUBLESHOOT UPSTREAM
RADIOS AND EXTERNAL MUX
EQUIPMENT.
NO, CHECK OPTICAL INPUT SIGNAL.
IF OPTICAL INPUT SIGNAL IS OK,
REPLACE OC3 I/O INTFC.
IF NOT, TROUBLESHOOT
EXTERNAL MUX EQUIPMENT.
AIS (BLUE SIGNAL), INSERTED AT MUX
(EXTERNAL TO THE RADIO) HAS BEEN
DETECTED ON OC3 INPUT TO OC3 I/O
INTFC.
TROUBLESHOOT EXTERNAL MUX
EQUIPMENT.
OC3 INPUT TO OC3 I/O INTFC HAS
EXCEEDED PROVISIONED BER
THRESHOLD (HIGH ERROR CONDITION).
TROUBLESHOOT EXTERNAL MUX
EQUIPMENT.
TRIGGERS WHEN BOTH A AND B RCVRS
HAVE LOF. THIS INITIATES A REQUEST TO SWITCH
XMTRS AT FAREND. WHEN RSL IS MORE POSITIVE
THAN - 50 DBM, FAREND XMTR SWITCHES IN 5 SE-
CONDS AND THEN SWITCHES EVERY 30 SECONDS
UNTIL ALARM CLEARS. AFTER XMTR SWITCHES 10
TIMES, THE I/O INTERFACE MODULE SWITCHES.
THIS SEQUENCE OF EVENTS CONTINUES UNTIL
ALARM CLEARS. TROUBLESHOOT FAREND XMTRS.
In order to clear a CLA, it must be
acknowledged locally (at radio
indicating alarm) using front panel
control on controller module.
Note