Huawei OLT optical module power

Huawei GPON OLT optical modules typically have transmit power ranging from 0.5 dBm to over 7 dBm depending on the module class, with receive power measured at the OLT ranging from approximately -28 dBm to -8 dBm.

Optical Module Classes and Power

Huawei GPON OLT modules are classified into B+, C+, and C++, each with different optical power characteristics:

• B+ Module: Standard GPON module with typical transmit power around 0.5–5 dBm and receive sensitivity suitable for standard GPON distances.
• C+ Module: Higher power module with transmit power slightly higher than B+, typically around 5–6 dBm, designed for longer reach or higher splitting ratios.
• C++ Module: Highest power module, with transmit optical power >7 dBm and receive power at the OLT around 5 dBm, approximately 2 dB higher than the C+ module, suitable for extended reach or high-split GPON networks .

Monitoring Optical Power

Huawei OLTs provide commands to check optical module power:

• Display Transceiver Command: display transceiver [interface interface-type interface-number | slot slot-id] shows detailed information about the optical module, including TX and RX power .
• Diagnostic Command: display transceiver diagnosis interface [interface-type interface-number] provides digital diagnostic monitoring (DMM) data, including real-time transmit and receive optical power, voltage, current, and temperature .
• YouTube Tutorials: Practical demonstrations show how to verify port optical RX and TX power on Huawei OLTs, including SFP details and port statistics .

Recommended Practices

• Always use Huawei-certified optical modules to ensure proper installation, signal quality, and device compatibility. Non-certified modules may cause abnormal data bus behavior, interface damage, or incorrect optical power readings .
• Maintain optical power within the recommended range for the module class to avoid signal degradation or ONU connectivity issues.
• For troubleshooting low or high optical power, check fiber connections, module cleanliness, and ensure the correct module class is used for the network distance and split ratio.

Summary

Huawei OLT optical modules have class-dependent transmit power, with B+ modules around 0.5–5 dBm, C+ around 5–6 dBm, and C++ exceeding 7 dBm. Receive power at the OLT typically ranges from -28 dBm to -8 dBm. Monitoring and diagnostics can be performed using Huawei CLI commands, and using certified modules ensures network stability and optimal optical performance .