Why is the optical module transmit power obtained using the MIB different from the transmit power displayed by the display command

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The transmit power value displayed by the display command is expressed in the unit of dBm, whereas the transmit power value displayed by the MIB is expressed in the unit of 10 uW. The relationship between the two units is: dbm = 10 x lg(mW).

Other related questions:
Method used to handle low transmit optical power
Possible cause 1: Any fiber pigtail in a multiplexing part or the optical cable degrades or is physically damaged. As a result, the attenuation of the fiber increases, and the receive optical power decline causes an OSNR decrease. Possible cause 2: The OA board gain at the local or peer site is decreased. For possible cause 1: a. Check the pigtail of the multiplexing part, and replace the pigtail if it is abnormal. b. Verify that the optical cable is normal. Note: A pigtail in a multiplexing part is one between the following units: Equipment and ODF OA and FIU OA and MUX/DEMUX ODFs TDC and RDC of an OAU board For possible cause 2: Check the OA board gain. If the gain is abnormal, replace the board.

Method of querying optical module information on an AR router
Run the display transceiver command on an AR router to query basic information of optical modules, including module type, production SN, and manufacturer. Run the display transceiver verbose command to query detailed information of optical modules, including receive and transmit power of optical modules.

How to determine whether an optical module is identified by the switch or check the transmit power of an optical module
Run the display transceiver command on a switch. If the following information is displayed, the optical module can be identified by the switch. This command can also display the type, wavelength, transmission distance, and power of the optical module. NOTICE: The switch must have Huawei certified optical modules installed. Non-Huawei-certified optical modules cannot ensure transmission reliability and may affect service stability on the switch. Huawei is not responsible for any problem caused by non-Huawei-certified optical modules and will not fix such problems.

Can I view the optical module types of switch and the receiving and transmitting power of the optical modules
You can use commands to view the information. To view the type of an optical module inserted into an optical interface, run the display interface interface-type interface-number command. To view the receiving and transmitting power on all interfaces, run the display transceiver diagnosis interface command. To view the receiving and transmitting power on an interface, run the display transceiver diagnosis interface interface-type interface-number command. For example: The display transceiver diagnosis interface GigabitEthernet 0/0/1 command displays the following information: Port GigabitEthernet0/0/1 transceiver diagnostic information: Parameter Current Low Alarm High Alarm Type Value Threshold Threshold Status ------------- --------- --------- ---------- -------- TxPower(dBm) -4.83 -11.02 -2.00 normal RxPower(dBm) NA -18.01 -1.00 NA Current(mA) 6.38 2.00 14.00 normal Temp.(C) 44.00 -20.00 90.00 normal Voltage(V) 3.31 2.90 3.70 normal

Pump optical power of the Raman board in C-band
1. RPC01 pump wavelength: 1400 nm to 1500 nm; maximum pump power: 28.5 dBm. 2. RPC03 pump wavelength: 1400 nm to 1500 nm; maximum pump power: 29.5 dBm.

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