XGS-PON & GPON Combo OLT SFP-DD Transceiver | Class C+ MPM Module

Overview

Maximize your fiber network’s potential with the GPON XGS-PON Combo SFP-DD OLT Module. This advanced Multi-Protocol Module (MPM) is designed to support both legacy GPON and next-generation XGS-PON subscribers on the same optical distribution network (ODN). By combining two technologies into a single SFP-DD (Double Density) form factor, operators can double their port density or upgrade services without changing the underlying fiber infrastructure.

The module operates as a Class C+ device, offering a high optical power budget to support split ratios of up to 1:128. It integrates four wavelengths—transmitting and receiving for both GPON (2.5G/1.25G) and XGS-PON (10G/10G) simultaneously. This “Combo” capability allows Internet Service Providers (ISPs) to offer 10 Gigabit speeds to premium users while maintaining service for existing GPON customers, ensuring a seamless and cost-effective migration path.

Key Features

• Combo Technology: Simultaneous support for GPON (ITU-T G.984) and XGS-PON (ITU-T G.9807.1).
• Form Factor: SFP-DD (Small Form-factor Pluggable Double Density) for high-density line cards.
• Optical Class C+: High power budget (>32dB) for extended reach and high split ratios.
• Wavelengths:
  • GPON: 1490nm Tx / 1310nm Rx
  • XGS-PON: 1577nm Tx / 1270nm Rx
• MPM Design: Integrated WDM multiplexer isolates GPON and XGS signals internally.
• Interface: Single SC/UPC connector.
• DDM Support: Real-time Digital Diagnostic Monitoring for optical power, temperature, and voltage.

Applications

This module is the cornerstone of modern FTTx (Fiber to the x) migrations. It is specifically built for Combo PON OLT line cards that utilize the SFP-DD interface to save faceplate space. Ideal applications include:

• Smooth Migration: Upgrade specific users to 10G XGS-PON without disrupting existing GPON users on the same splitter.
• High-Density Deployments: Utilize SFP-DD slots to maximize the capacity of OLT chassis in constrained central offices.
• Triple Play Services: deliver high-bandwidth data, IPTV, and VoIP with QoS assurance for both network standards.

Specifications

Cross-Platform Compatibility

The SFP-DD Combo OLT transceiver is engineered for compatibility with leading OLT manufacturers that support Multi-Protocol Modules (MPM) and high-density interfaces. Compatibility includes:

Advantages

The primary advantage of the Combo PON SFP-DD is its ability to future-proof your network investment. Instead of replacing entire chassis or running new fiber, you simply plug this module into a compatible OLT port. The built-in WDM filter ensures that 10G signals do not interfere with 1G signals. Furthermore, the Class C+ power budget ensures robust signal strength, reducing the need for optical amplifiers or reach extenders in standard 20km deployments.

FAQ (Technical & Product Questions)

1. What is the difference between SFP+ and SFP-DD?

SFP-DD (Double Density) has an additional row of electrical contacts compared to standard SFP+, allowing for higher bandwidth or dual-channel operations. While physically similar in size, SFP-DD modules require SFP-DD compatible cages to function at full capacity.

2. Can I use this module for just GPON or just XGS-PON?

Yes. Although it transmits both, the OLT can be configured to provision only one type of service if needed. However, its main value is running both simultaneously.

3. Do I need to change my optical splitters?

Generally, no. Standard optical splitters work across a wide band of wavelengths. However, you must ensure your splitters pass the 1270nm and 1577nm wavelengths used by XGS-PON in addition to standard GPON frequencies.

4. What connects to the other end (Subscriber side)?

On the subscriber side (ONU/ONT), you can have a mix of devices. A GPON ONU will lock onto the 1490nm signal, and an XGS-PON ONU will lock onto the 1577nm signal. They coexist on the same fiber strand without interference.

5. Is this module compatible with Huawei MA5600T?

Typically, the MA5600T supports older SFP+ based Combo cards. The SFP-DD form factor is more common in the newer MA5800 series or specific high-density boards. Please check your specific line card model.