GPON OLT SFP Transceiver | Class C+ | 60km Ultra-Long Reach | 2.5G

Overview

The GPON OLT SFP Transceiver (Class C+, 60km) is an industrial-grade optical module engineered for extreme-distance Passive Optical Networks. Surpassing the standard 20km limit of typical GPON deployments, this ultra-long reach transceiver supports link distances up to 60km, making it the ultimate solution for sparse rural networks and long-haul backhaul connections.

Equipped with a high-power DFB laser and a high-sensitivity APD receiver, this module meets and exceeds Class C+ optical budget requirements. It delivers standard asymmetric GPON speeds (2.5Gbps Down / 1.25Gbps Up) and ensures seamless interoperability with major OLT platforms like Huawei, ZTE, and FiberHome.

Key Features

• Ultra-Long Reach (60km): Specialized optics enable transmission distances three times longer than standard GPON modules, ideal for remote subscriber connection.
• High-Power Class C+: Features an enhanced optical power budget (typically >33dB) to overcome significant fiber attenuation over long runs.
• Standard GPON Rates: Full compliance with ITU-T G.984.2, supporting 2.488Gbps downstream and 1.244Gbps upstream.
• SFP Form Factor: Hot-pluggable design with a simplex SC/UPC interface for easy installation in OLT PON ports.
• Real-Time Monitoring: Integrated Digital Diagnostic Monitoring (DDM/DOM) for tracking laser bias, temperature, and optical power.

Applications

• Remote Rural FTTx: Connecting isolated villages or farms located far from the central exchange without active repeaters.
• Network Cascading: Providing backbone connectivity to remote mini-OLTs or optical amplifiers.
• Highway/Pipeline Surveillance: Supporting long-distance daisy-chained monitoring systems.
• Low-Split Long-Haul: Utilizing low split ratios (e.g., 1:8) to maximize distance over fiber.

Specifications

Cross-Platform Compatibility

This 60km GPON OLT SFP is programmed with MSA-compliant firmware and specific manufacturer codes to ensure plug-and-play recognition in leading OLT chassis. It serves as a high-performance alternative for:

Technical Note on 60km Deployment

While this module is capable of driving signals up to 60km, the Passive Optical Network (PON) physics requires a trade-off between distance and split ratio. The substantial fiber attenuation over 60km (approx. 21dB loss) consumes much of the optical budget.

Deployment Guideline: To achieve the full 60km reach, operators must reduce the split ratio significantly (e.g., 1:4 or 1:8). Standard 1:64 splits are generally not possible at maximum range. Always calculate your total link loss including fiber, splices, and splitters against the module’s 33dB+ budget.

FAQ

1. Can I use this 60km module with a 1:64 splitter?

Only at shorter distances. If you are deploying at the full 60km range, a 1:64 splitter (which adds ~18dB loss) combined with 60km of fiber loss (~21dB) would exceed the total power budget. For 60km runs, we recommend 1:8 or 1:16 splits maximum.

2. Will this work in a Huawei MA5608T OLT?

Yes, this transceiver is fully compatible with the Huawei MA5608T and other MA5600T/MA5800 series OLTs, provided the port is configured for standard GPON operation.

3. Is special ONU equipment required for 60km?

Generally, standard ONUs can be used, but the OLT system parameters (specifically the logical reach or differential distance settings) must be adjusted in the software configuration to account for the longer signal propagation delay associated with 60km.

4. How does this differ from the 40km Class B+ module?

The 60km Class C+ module has a higher transmit power and better receiver sensitivity than the 40km Class B+ version. This provides a larger optical budget, allowing for either longer distances or slightly higher split ratios at medium distances.