User's Manual

5-23
Figure 5 - 11 Troubleshooting DS3 Radio Wayside DS1 Alarms
Figure 5 - 12 Troubleshooting OC3/STM-1 Radio Wayside DS1 Alarms
DS1 Inuput Loss
DS1 XMT ALARM
DS1 AIS INSERT
DS1 RCV ALARM
DS1 ALARMS
LMW-3134
04/07/05
Loss of receive clock, buffer spills, or alarm insertion signal on
the alarmed line. May also be caused by DS1 driver failure.
Replace I/O Interface module.
Transmit hardware failure or buffer spills on alarmed line.
1. Verify quality of TX input data.
2. Replace I/O Interface module.
Loss of input signal to I/O Interface, inability to recover clock on
alarmed line, or bipolar violation detection.
1. Check presence and quality of DS1/E1 input to radio.
2. Replace I/O Interface module.
LOS has been detected at RCV Input of I/O interface
and AIS (All Ones or Zeros) is being inserted.
Check for LOS at XMT end of HOP. If not,
1. Check for upstream XMTR alarms.
Any XMTR alarms?
Yes, troubleshoot XMTR.
No, go to 2.
2. Replace alarmed DS3 I/O INTFC.
WAYSIDE DS1
DS1 Online
DS1 Output Alarm
DS1 AIS Detect
DS1 Input Alarm
LMW-5032
07/12/05
AIS detected on DS1 input to radio.
Fault is external to radio.
Check external device supplying
DS1 to radio.
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.