How many kilometers does a Huawei C optical module cover

Huawei C-class optical modules typically cover up to 20 kilometers, depending on the specific model and deployment scenario.Huawei C-class optical modules, such as the GPON-OLT-CLASS-C+/C++ series, are designed for single-mode fiber networks and are commonly used in GPON access services . These modules generally support transmission distances of up to 20 km, which makes them suitable for connecting optical line terminals (OLTs) to optical network units (ONUs) in metropolitan or suburban areas.Factors Affecting CoverageModule Type: Single-mode modules (SM) can reach longer distances than multi-mode modules (MM). For example, Huawei SFP-FE-LX-SM1310 modules support 15 km, while S-SFP-FE-LH40-SM1310 modules can reach 40 km .Wavelength: C-class modules typically operate at 1310 nm for upstream and 1490 nm for downstream signals in GPON networks.Network Conditions: Fiber quality, splices, connectors, and optical splitters can reduce effective transmission distance.Power Budget: The optical power output and receiver sensitivity determine the maximum achievable distance without signal degradation.Practical ApplicationsGPON Access Networks: Connecting OLTs to multiple ONUs in residential or business areas.Data Center Interconnects: Short- to medium-range connections within or between data centers.Flexible Deployment: Depending on the model, Huawei C-class modules can be used for distances ranging from 10 km to 20 km, with some enhanced models reaching up to 40 km under optimal conditions . In summary, a standard Huawei C optical module is designed to cover approximately 20 km, but the exact distance depends on the module variant, fiber type, and network setup. For precise deployment planning, consulting the module datasheet is recommended to account for optical power and network losses.