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15.5dbm是多少毫瓦_:...

手机信号强度asu多少最好

魅族信号强度 -69 dbm 22asu 什么意思?

华为交换机S5700问题,

Jan 14 2014 18:51:28-05:13 Quidway %%01SRM/3/RXPOWER_EXCEEDMINOR(l)[21]:Optical module in interface GigabitEthernet0/1/4 exception, RX power too low. Jan 14 2014 18:51:48-05:13 Quidway SRM/4/OPTPWRRESUME:OID 1.3.6.1.4.1.2011.5.25.129.2.17.... 1.(EntityPhysicalIndex=67125518.129:OID 1:52:30-05:13 Quidway %%01SRM/ Default lower threshold is -18.17.1 Optical module power is abnormal.3, BaseTrapProbableCause=67697, BaseTrapEventType=9;1/: The current Rx power is -39.43dBM; Set lower threshold is -18.99dBM; Set higher threshold is -3.00dBM.)
Jan 14 2014 18:52;3/.6.99dBM, RelativeResource=Interface GigabitEthernet0/1/4 optical module Rx Power, ReasonDescription=Rx power has resumed. The detail information is as follows: The current Rx power is NaNdBM; Set lower threshold is -18.99dBM; Set higher threshold is -3.00dBM.)
Jan 14 2014 18:52.4: The current Rx power is NaNdBMJan 14 2014 18, BaseTrapProbableCause=67697, BaseTrapEventType=9.6:OID 1:30-05:13 Quidway %%01SRM/3/RXPOWER_EXCEEDMINOR(l)[22].1.

这个是怎么回事, BaseTrapProbableCause=67697, BaseTrapEventType=9:Optical module in interface GigabitEthernet0/1/4 exception, RX power too low.
Jan 14 2014 18;4.6.3, RX power too low, EntPhysicalName=GigabitEthernet0/RXPOWER_EXCEEDMINOR(l)[21]:Optical module in interface GigabitEthernet0/, RelativeResource=Interface GigabitEthernet0/1/4 optical module Rx Power, ReasonDescription=Rx power is too low, EntPhysicalName=GigabitEthernet0/. The detail information is as follows;1/.(EntityPhysicalIndex=67125518.
Jan 14 2014 18:51:52:30-05:13 Quidway SRM/4; Set lower threshold is -18, EntPhysicalContainedIn=0;1/.5.2011.5.25;4 optical module Rx Power:51:28-05:13 Quidway %%01SRM/:48-05: The current Rx power is -39.43dBM; Set lower threshold is -18.99dBM; Default lower threshold is -18.99dBM)
Jan 14 2014 18.25.129.2.17, RelativeResource=Interface GigabitEthernet0/1/4 optical module Rx Power, ReasonDescription=Rx power is too low;4.2 Optical module recovered from power abnormal.(EntityPhysicalIndex=67125518, BaseTrapSeverity=6, BaseTrapProbableCause=67697, EntPhysicalContainedIn=0:09-05.129.1.1;1/:13 Quidway SRM/3/OPTPWRABNORMAL, ReasonDescription=Rx power has resumed.2011.5.25;4/, BaseTrapEventType=9, EntPhysicalContainedIn=0, EntPhysicalName=GigabitEthernet0/1/4, RelativeResource=Interface GigabitEthernet0/:13 Quidway SRM/3/OPTPWRABNORMAL?怎么能取消这个.17.1 Optical module power is abnormal;3/.2011.5.25:09-05;1/.129.2.3:OID 1:13 Quidway SRM/4/OPTPWRRESUME, RX power too low, EntPhysicalName=GigabitEthernet0/OPTPWRRESUME:OID 1.3.6.1.4.1.2011.2;4 exception.17.2 Optical module recovered from power abnormal. The detail information is as follows, EntPhysicalContainedIn=0.4.99dBM)
Jan 14 2014 18:52.2;RXPOWER_EXCEEDMINOR(l)[23]:Optical module in interface GigabitEthernet0/.1, BaseTrapSeverity=5;4 exception, BaseTrapSeverity=5.1.(EntityPhysicalIndex=67125518, BaseTrapSeverity=6. The detail information is as follows.4;1/

已知光纤通信系统光纤损耗为0.6dB/km,有6个接头,平均每个接头损耗为0.15 dB,光源入纤功率为–4dBm,接

(52-4-6-6×0.15)/0.6=68.5公里
另:此题有问题,68.5公里怎么会只有6个接头?系统损耗怎么可能达到0.6dB/km?


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