Chapter 2 Alarm
2.2.30 134239931 Transmission unit invalid
Alarm Property
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Alarm Code: 134239931
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Alarm Information: The transmission unit fails due to alarms 134239928, 134239929,
and 134239930 (1+1 protection and 1+0 protection are distinguished through
subcode)
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Alarm Level: Critical
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Alarm Type: Communications Alarm
Sub-code Description
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Sub-code 0: Trangsmission unit failure (1+1) caused by the RMU alarm (IF loss of
lock; modulation part is not working properly,baseband part is not working properly);
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Sub-code 1: Transmission unit failure (1+0) caused by the RMU alarm (IF loss of lock;
modulation part is not working properly; baseband part is not working properly);
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Sub-code 2: Transmission unit failure (1+1) caused by the ODU alarm (Tx RF PLL
loss of lock;Tx IF PLL loss of lock; Rx RF PLL loss of lock; Rx IF PLL loss of lock);
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Sub-code 3: Transmission unit failure (1+0) caused by the ODU alarm (Tx RF PLL
loss of lock; Tx IF PLL loss of lock; Rx RF PLL loss of lock; Rx IF PLL loss of lock).
Effect on the System
The traffic carried by the transmission unit is interrupted.
Possible Causes
Refer to the probable causes of the alarms 134239928, 134239929, and 134239930.
Handling Procedure
Refer to the handling suggestions of the alarms 134239928, 134239929, and 134239930.
2.2.31 134239935 ODU mute
Alarm Property
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Alarm Code: 134239935
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Alarm Information: The alarm is reported if the transmission power of ODU is set to 0
in LMT.
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Alarm Level: Major
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Alarm Type: Communications Alarm
Sub-code Description
None
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SJ-20111008094748-008|2012–05–30 (R1.1)
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