XGS-PON OLT XFP Transceiver N1 Class | 10G/10G & 10G/2.5G | ITU-T G.9807.1

Overview

The XGS-PON OLT XFP N1 Transceiver is a carrier-grade optical module designed for the service provider’s headend (Optical Line Terminal). Engineered to comply with ITU-T G.9807.1 standards, this module provides a cost-effective entry point for deploying 10-Gigabit Passive Optical Networks. It is specifically rated as an N1 Class device, providing a standard optical link budget suitable for typical urban fiber deployments and moderate split ratios.

Operating in the XFP form factor, this module serves as the central hub for your PON network, transmitting data downstream at 1577nm and receiving upstream traffic at 1270nm. It is fully capable of supporting dual-rate operations: symmetrical XGS-PON (10G/10G) for enterprise or premium residential tiers, and asymmetrical XG-PON (10G/2.5G) for standard high-speed broadband. This versatility allows Internet Service Providers (ISPs) to mix and match service levels on the same fiber infrastructure.

Key Features

• Standard N1 Optical Class: Optimized for standard reach and split ratios (typically 1:32), offering a balance of performance and cost.
• Multi-Rate Support: Seamlessly handles XGS-PON (9.953Gbps symmetric) and XG-PON (9.953Gbps/2.488Gbps) traffic.
• Wavelength Management: Tx 1577nm / Rx 1270nm configuration ensures coexistence with legacy GPON on the same fiber.
• XFP Form Factor: Industry-standard footprint compatible with a wide range of OLT chassis line cards.
• Digital Diagnostics: Integrated DDM/DOM allows for real-time monitoring of laser output, receiver sensitivity, and temperature.
• Interface: Single SC/UPC connector for bidirectional communication.

Applications

This N1 Class OLT transceiver is ideally suited for FTTx architectures where the optical path loss is within the standard 29dB range. Common deployment scenarios include:

• Urban FTTH: Connecting high-density residential areas where fiber runs are short to medium in length.
• Enterprise Access: Providing dedicated 10G symmetrical links to business parks or campus environments.
• Mobile Backhaul: Supporting 5G small cell connectivity with low-latency optical transport.

Specifications

Advantages

Choosing the XGS-PON OLT XFP N1 offers a strategic advantage in network planning. By utilizing N1 class optics where the extra power of N2 is not required, operators can reduce overall capital expenditure (CAPEX) without sacrificing service quality. The module’s inherent ability to support both 10G and 2.5G upstream speeds means you can upgrade subscribers from XG-PON to full XGS-PON services via software configuration, eliminating the need for future truck rolls to the central office.

Furthermore, the specific wavelengths used (1577nm/1270nm) allow this technology to overlay existing GPON networks. By employing passive coexistence elements (C-WDM), ISPs can introduce 10G services to high-value customers while maintaining legacy 1G services for the bulk user base on the same physical fiber plant.

FAQ (Technical & Product Questions)

1. What is the main difference between N1 and N2 Class OLT modules?

The primary difference is the Optical Power Budget. N1 class modules typically support a budget of around 29dB, which is sufficient for split ratios of 1:32 or shorter distances. N2 class modules offer a higher budget (approx. 31dB), enabling higher split ratios (like 1:64) or longer fiber reaches.

2. Can I replace an N1 module with an N2 module later?

Generally, yes. If you need to extend your network reach or increase the split ratio, swapping an N1 OLT transceiver for an N2 version is a common upgrade path, provided your OLT chassis supports the specific module.

3. Is this transceiver compatible with standard SFP+ ports?

No. This module uses the XFP form factor, which is physically larger than SFP+. It is designed specifically for OLT line cards that require XFP interfaces. It will not fit into a standard SFP+ switch port.

4. How do I clean the optical connector on this OLT module?

Since this is a high-power laser device, proper cleaning is essential. Use a dedicated one-click cleaner for SC connectors or an optical grade lint-free wipe with isopropyl alcohol. Never look directly into the optical bore, as the 1577nm laser is invisible and can cause eye damage.

5. Can I use MPO/MTP® cables with this transceiver?

This transceiver has a simplex SC interface, so you cannot plug an MPO/MTP® connector directly into it. However, in the central office, these modules typically connect to a breakout panel or ODF, which then aggregates traffic into high-density MPO/MTP® trunk cables for routing between racks.