XGS-PON OLT SFP+ Transceiver | 10G Symmetric | Class N2 Optical Budget

Overview

The XGS-PON OLT SFP+ Transceiver (Class N2) is a high-speed optical module designed for next-generation Fiber-to-the-Home (FTTH) and Fiber-to-the-Business (FTTB) networks. Compliant with the ITU-T G.9807.1 standard, this module supports Symmetric 10-Gigabit bandwidth (9.953Gbps downstream and upstream), enabling service providers to offer ultra-fast broadband plans suited for streaming, cloud computing, and enterprise connectivity.

This specific model is rated Class N2, offering a robust optical power budget (typically ~31dB) that bridges the gap between standard N1 class and high-power E1 class modules. It operates within commercial temperature ranges (0°C to 70°C), making it the standard choice for climate-controlled Central Offices (CO) and indoor data centers using modern OLT platforms.

Key Features

• Symmetric 10G Connectivity: Delivers 9.953 Gbps in both upstream and downstream directions, eliminating the upstream bottlenecks associated with legacy XG-PON (asymmetric) or GPON technologies.
• Class N2 Optical Budget: Provides a link budget of approximately 31dB, supporting split ratios of up to 1:64 over 20km, offering a perfect balance of reach and density.
• Standard SFP+ Form Factor: Fits into standard SFP+ ports on XGS-PON OLT line cards, ensuring broad hardware compatibility.
• Single Fiber Operation: Utilizes Wavelength Division Multiplexing (WDM) to transmit and receive data over a single strand of Single Mode Fiber (SMF).
• Digital Diagnostics (DDM): Supports real-time monitoring of transceiver status, including temperature, laser bias, voltage, and optical power levels, facilitating proactive network maintenance.

Applications

• Gigabit Society Infrastructure: Enables ISPs to offer “True 10G” residential packages to complete with cable and 5G fixed wireless.
• Enterprise Passive Optical LAN (POL): Ideal for connecting high-bandwidth endpoints (Wi-Fi 6/7 Access Points, Security Cameras, Workstations) in campus environments.
• 5G Mobile Backhaul: Provides low-latency, high-capacity fronthaul and backhaul connectivity for small cells via the PON infrastructure.
• Central Office Upgrades: Seamless integration into existing OLT chassis to upgrade from GPON to XGS-PON services.

Specifications

Optical Class N1 vs. N2

Understanding the optical class is critical for network planning. The Class N2 rating of this module represents a “Mid-High” power level defined by the ITU-T:

• Class N1: Approx. 29dB budget. Suitable for shorter runs or lower split ratios (e.g., 1:32).
• Class N2 (This Product): Approx. 31dB budget. The industry standard for most XGS-PON deployments, supporting full 1:64 splits at 20km distances without needing extra amplification.

Compatibility

This XGS-PON OLT transceiver uses open-standard MSA coding and is compatible with a wide range of OLT manufacturers that allow third-party optics, including:

• Huawei: SmartAX MA5800 Series (XGSH/XGHD Service Boards)
• ZTE: C300/C600 Series OLTs
• Nokia: ISAM FX Series (FWLT-B)
• FiberHome: AN6000 Series
• Ubiquiti: UFiber OLTs (XGS models)

FAQ (Technical & Product Questions)

1. What is the difference between XGS-PON and XG-PON?

XGS-PON is Symmetric, providing 10G upload and 10G download speeds. XG-PON is Asymmetric, providing 10G download but only 2.5G upload. XGS-PON is the preferred modern standard as it supports high-upload applications like cloud backups, video conferencing, and enterprise hosting.

2. Can I use this OLT module with GPON ONUs?

No. This is a dedicated XGS-PON OLT module. It transmits at 1577nm and receives at 1270nm. It cannot communicate with GPON ONUs (which use 1490nm/1310nm). If you need to support both GPON and XGS-PON on the same fiber, you need a Combo PON Module.

3. Does this module support 1:128 split ratios?

While Class N2 is optimized for 1:64 splits, it can theoretically support 1:128 if the total fiber distance is short and loss is minimal. However, for guaranteed 1:128 splits at 20km, a Class E1 or Combo C+ module is often recommended due to the higher insertion loss of the splitters.

4. Why is the upstream wavelength 1270nm?

XGS-PON uses 1270nm for upstream to avoid interference with GPON upstream (1310nm) and RF Video Overlay (1550nm). This wavelength plan allows XGS-PON to coexist with these other services on the same fiber plant.

5. Is this module hot-swappable?

Yes, like standard SFP+ transceivers, this module is hot-swappable, allowing you to insert or remove it from the OLT line card without powering down the system.