XG-PON OLT SFP+ Transceiver | 10G/2.5G Asymmetric | N1 Class | 1577nm

Overview

The XG-PON OLT SFP+ N1 Transceiver is the fundamental building block for next-generation Passive Optical Networks (PON). Designed for the Optical Line Terminal (OLT) at the central office, this module enables Internet Service Providers (ISPs) to upgrade their infrastructure from legacy GPON to high-speed 10-Gigabit services.

Adhering to the ITU-T G.987.2 standard, this transceiver provides asymmetric bandwidth, delivering 9.953 Gbps downstream to subscribers and receiving 2.488 Gbps upstream. It utilizes the N1 optical class, offering a cost-effective standard power budget suitable for typical urban and suburban fiber deployments. The module fits into standard SFP+ ports on OLT equipment, making it a flexible solution for scaling broadband capacity.

Key Features

• Asymmetric 10G Performance: Provides 10Gbps downstream and 2.5Gbps upstream throughput.
• N1 Optical Budget: Standard class budget (typically ~29dB) optimized for standard reach and split ratios (e.g., 1:64 at 20km).
• Dual-Wavelength Operation: Transmits data at 1577nm and receives burst-mode traffic at 1270nm.
• SFP+ Form Factor: Hot-pluggable design ensures easy installation and maintenance in high-density OLT chassis.
• Digital Diagnostics Monitoring (DDM): Real-time access to operating parameters such as laser bias, temperature, and supply voltage.
• Robust Design: Built to withstand the rigorous demands of carrier-class central office environments.

Applications

This N1-class OLT module is ideal for a wide range of FTTx scenarios:

• Residential Broadband: Delivering “Gigabit+” service tiers to homes (FTTH) efficiently.
• MDUs (Multi-Dwelling Units): Connecting apartment complexes where fiber runs are within standard distance limits.
• Video & Streaming Services: Supporting high-bandwidth downstream traffic for 4K/8K IPTV.
• Smart City Infrastructure: Providing the optical backbone for connected surveillance and municipal IoT devices.

Specifications

Advantages

The XG-PON OLT SFP+ N1 represents a balanced solution for network operators. It provides the massive bandwidth leap of 10G technology without the premium cost associated with higher-power N2 or N2a optics. For deployments where the fiber plant is well-maintained and distances are within the standard 20km radius, the N1 class provides reliable, error-free transmission.

Furthermore, its adherence to the SFP+ MSA ensures it can be deployed in a variety of OLT chassis from major vendors, provided the software configuration supports third-party optics. This flexibility allows ISPs to manage inventory costs effectively while rolling out next-gen services.

FAQ (Technical & Product Questions)

1. What is the difference between N1 and N2 class optics?

The primary difference is the optical power budget. N1 is the standard class (approx. 29dB budget), suitable for typical deployments. N2 (and N2a) are higher-power classes (approx. 31dB+ budget), designed for longer distances or networks with more splitters (higher attenuation).

2. Can I replace a GPON OLT module with this XG-PON module directly?

Physically, yes, if the OLT port supports SFP+. However, the ONUs (modems) at the customer’s home must also be upgraded to XG-PON ONUs. Standard GPON ONUs cannot read the 1577nm signal sent by this module. To run both simultaneously, you need external WDM coexistence elements.

3. What fiber cable do I need?

This module requires Single-Mode Fiber (SMF), usually OS2, terminated with an SC/UPC connector. Do not use Multi-Mode fiber or LC connectors directly into the module.

4. Does this module support symmetric 10G upload speeds?

No. This is an XG-PON module (10G Down / 2.5G Up). For symmetric 10G/10G speeds, you would need an XGS-PON module, which is a different standard (G.9807.1).

5. Is this module compatible with MPO/MTP® connectors?

No. MPO/MTP® connectors are designed for parallel multi-fiber applications. This OLT module uses a single fiber strand for bidirectional communication and requires a standard simplex SC connector.