EXPRESS DAS
Installation and Operations Manual
EXPRESS DAS Installation and Operations Manual – Version 2.2 November 2013
115
12.7
Alarm Troubleshooting
This section of the manual explains alarm indicators in the management software and provides tips on
resolving alarms.
No
LED Status
Description
1
Normal Status
2
Abnormal or Warning Status
Table 12.5 – Alarm Indicators in Management Software
12.7.1 ODU Alarm Troubleshooting
Unit
ALARM
Cause
Management
DOU
Overload Alarm
Tx input level to DOU is too high
Check output power of MDBU
Check input power of MDBU
LD POWER
Failure of DOU
PSU not at +9V
Replace DOU
Using DVM, check voltage of +9V
PD POWER
Optical loss is too high
Loose optical port
Over-curvature or cut optical cable
MRU power supply turned off
Using optical power meter, check
received optical power level
Check MRU power
Table 12.6 – ODU Alarm Indicators in Management Software
Содержание EXPRESS Single-Carrier DAS
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