Class C+ modules offer higher optical power, better receiver sensitivity, and longer transmission distances than Class B+, making them the preferred choice for Huawei GPON networks.

Key Differences

• Optical Power and Receiver Sensitivity: Class B+ modules have a lower transmit power (up to +5 dBm) and less sensitive receivers, while Class C+ modules provide higher transmit power (up to +7 dBm) and improved receiver sensitivity. Class C++ modules go even further, with transmit power up to +10 dBm and the most sensitive receivers, supporting long-distance links up to 60 km .
• Transmission Distance: Class B+ typically supports distances up to 20 km, suitable for short-range deployments. Class C+ also supports up to 20 km but with better performance in higher-loss networks. Class C++ is ideal for long-span or high-split networks .
• Network Suitability: Class C+ and C++ modules are recommended for high-loss or long-distance GPON deployments, while B+ is generally not recommended due to higher fault rates and lower performance .
• OLT Compatibility: Huawei MA5600T and MA5800 OLT boards (e.g., GPBD, GPFD, GPUF, GPSF, GPHF) are typically equipped with C+ modules. C++ modules can be used if higher performance is required, but B+ modules are less reliable for these platforms .
• Cost Considerations: B+ modules are cheaper but come with higher risk of faults. C+ modules offer a balance of performance and cost, while C++ modules are the most expensive but provide the highest optical budget and reliability .

Summary Recommendation

For most Huawei GPON deployments:

• Use Class C+ for standard OLT boards and medium-to-long distance networks.
• Use Class C++ for high-split ratios, long-distance links, or high-loss environments.
• Avoid Class B+ unless cost constraints are critical and network distances are short, as it has higher fault rates and lower performance . Choosing the right module ensures optimal network performance, reliability, and scalability for GPON, XG-PON, or XGS-PON deployments.