Alcatel MDR-8000 User Manual page 57

SUMMARY ALARM
FOR RCVR.
SEE DS1/E1 RCV
ALARMS, FIGURE 5-5
FUTURE USE
Figure 5-8 Troubleshooting OC3 Radio RCV Alarms
RECEIVER
STATUS
A
Receiver Fault
Receiver On Line
Channel Fail
Eye Closure
Low RSL
Path Distortion
Radio Frame Loss
OC3 Output Online
OC3 Common Loss
OC3 LOF
OC3 AIS-L Detect
OC3 Degrade
I/O CONDITIONER CANNOT RECOVER FRAMING
FROM SIGNAL FROM RCVR MODULE.
1. IS OC3 AIS-L Detect ALARM ON?
YES, CHECK FOR UPSTREAM XMTR
OC3 AIS-L Detect ALARM. IF XMTR OC3
AIS Detect ALARM IS ON, TROUBLESHOOT
EXTERNAL MUX EQUIPMENT AT XMT END.
IF NOT, TROUBLESHOOT UPSTREAM XMTR.
B
NO, GO TO 2.
2. IS RADIO HOT-STBY?
YES
A. ARE A AND B ALARMED?
YES, TROUBLESHOOT XMTR
NO, GO TO B
B. REMOVE/REPLACE RCVR MODULE.
C. REMOVE/REPLACE ALARMED OC3 I/O INTFC.
AIS (BLUE SIGNAL), INSERTED AT MUX (EXTERNAL
TO THE RADIO) HAS BEEN DETECTED BY OC3 I/O
INTFC RCV CIRCUITS.
TROUBLESHOOT EXTERNAL MUX EQUIPMENT
(FAULT IS NOT IN RADIO).
SIGNAL FROM RCVR MODULE (INPUT TO OC3
I/O INTFC) HAS EXCEEDED PROVISIONED BER
THRESHOLD (TYPICAL FADE CONDITION).
IS OC3 LOF ALSO ON?
YES, TROUBLESHOOT OC3 LOF.
NO, AND NO-FADE CONDITION CONFIRMED
1. REPLACE RCVR MODULE.
2. REPLACE ALARMED OC3 I/O INTFC MODULE.
LMW-5035-SM
06/27/02
5-13