光口总是闪断，能否看下是否存在尾纤光衰

<H3C>display transceiver diagnosis inter

<H3C>display transceiver diagnosis interface 

GigabitEthernet1/0/1 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/2 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/3 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/4 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/5 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/6 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/7 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/8 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/9 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/10 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/11 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/12 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/13 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/14 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/15 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/16 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/17 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/18 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/19 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/20 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/21 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/22 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/23 transceiver diagnostic information:

The transceiver is absent.

GigabitEthernet1/0/24 transceiver diagnostic information:

The transceiver is absent.

Ten-GigabitEthernet1/0/25 transceiver diagnostic information:

The transceiver is absent.

Ten-GigabitEthernet1/0/26 transceiver diagnostic information:

  Current diagnostic parameters:

    Temp.( Voltage(V)  Bias(mA)  RX power(dBm)  TX power(dBm)  

    28         3.38        4.70      -5.38          -5.53          

  Alarm thresholds:

          Temp.( Voltage(V)  Bias(mA)  RX power(dBm)  TX power(dBm)  

    High  88         3.80        17.00     0.00           -2.00          

    Low   -23        2.80        1.00      -16.99         -12.50         

Ten-GigabitEthernet1/0/27 transceiver diagnostic information:

  Current diagnostic parameters:

    Temp.( Voltage(V)  Bias(mA)  RX power(dBm)  TX power(dBm)  

    29         3.38        4.33      -6.19          -5.49          

  Alarm thresholds:

          Temp.( Voltage(V)  Bias(mA)  RX power(dBm)  TX power(dBm)  

    High  88         3.80        17.00     0.00           -2.00          

    Low   -23        2.80        1.00      -16.99         -12.50         

Ten-GigabitEthernet1/0/28 transceiver diagnostic information:

The transceiver is absent.