User's Manual

5-18
Figure 5-14 Troubleshooting OC3 Radio Wayside DS1 Alarms
5.7.3
Ring Radio Troubleshooting
The four ring status LEDS on the front panel of the controller module are useful in deter-
mining the status of the ring radios. The four LEDs are divided into two groups: Command
LEDs and Idle LEDs. Each group has an LED for the RF path and a LED for the repeater
link. The command LEDs use a flashing pattern to determine the status of the ring. The Idle
leds are used to determine if ring commands are being received on the corresponding port.
Refer to ring trouble shooting on the attached CD for details.
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
WAYSIDE DS1
Xmtr/Rcvr On Line
Xmtr LOS
Xmtr LOF
Xmtr AIS Detect
1 2 3
1 2 3
1 2 3
1 2 3
Rcvr LOF
Rcvr AIS Detect
LMW-5032
07/17/02
AIS DETECTED ON DS1 INPUT TO RADIO.
FAULT IS EXTERNAL TO RADIO.
CHECK EXTERNAL MUX SUPPLYING DS1/E1 TO RADIO.
AIS HAS BEEN DETECTED ON OUTPUT OF RADIO
RCVR. FAULT IS NOT IN THIS RADIO.
CHECK UPSTREAM XMTR/HOPS FOR ALARMS.
INABILITY TO RECOVER CLOCK
OR BIPOLAR VIOLATION DETECTED
ON DS1/E1 INPUT TO RADIO.
1. CHECK QUALITY OF DS1 INPUT
TO RADIO.
2. REPLACE I/O INTFC MODULE.
INABILITY TO RECOVER CLOCK OR
BIPOLAR VIOLATION DETECTED ON
OUTPUT OF RADIO RCVR.
1. CHECK XMTR END OF HOP FOR
ALARMS.
2. REPLACE ALARMED I/O INTFC
MODULE.
LOSS OF INPUT SIGNAL TO I/O INTFC.
1. CHECK PRESENCE OF DS1 INPUT TO RADIO.
2. REPLACE I/O INTFC MODULE.