Overview
The XG-PON OLT XFP N1 Transceiver is a dedicated optical module for service providers operating 10-Gigabit Passive Optical Networks (XG-PON) on hardware platforms requiring the XFP form factor. While SFP+ is common in newer equipment, the XFP interface remains a vital standard for maintaining and expanding capacity on existing high-density OLT line cards.
Compliance with the ITU-T G.987.2 standard ensures seamless interoperability within XG-PON ecosystems. This module delivers asymmetric 10G performance (9.953 Gbps downstream / 2.488 Gbps upstream). It utilizes the N1 Optical Class, offering a standard power budget of approximately 29dB. This makes it an economically efficient solution for urban and suburban deployments where fiber runs are within the standard 20km range and split ratios are moderate (typically 1:64).
Key Features
- XFP Form Factor: specifically designed for OLT chassis and line cards with XFP interfaces, ensuring continued utility of established hardware.
- N1 Optical Budget: Standard class budget (~29dB) optimized for cost-effective, standard-reach network designs.
- Asymmetric 10G Speed: Provides high-speed 10Gbps downstream to support Gigabit+ service tiers, with 2.5Gbps upstream.
- Dual-Wavelength Operation: Transmits at 1577nm (Continuous) and receives at 1270nm (Burst Mode).
- Digital Diagnostics (DDM): Integrated monitoring for critical parameters including laser bias, temperature, and supply voltage.
- Hot-Pluggable: Allows for easy installation and replacement without disrupting the entire OLT system.
Applications
The XG-PON XFP N1 module is suited for a variety of standard FTTx scenarios:
- Residential FTTH: Delivering high-speed internet and streaming services to homes in densely populated areas.
- Brownfield Upgrades: upgrading existing GPON networks to XG-PON on OLTs that utilize XFP ports.
- Campus Networks: Providing optical backbones for universities or corporate campuses with standard distance requirements.
- Surveillance Networks: Supporting high-bandwidth downstream for IP camera aggregation points.
Specifications
| Parameter | Value |
|---|---|
| Form Factor | XFP (OLT Application) |
| Standard Compliance | ITU-T G.987.2 (XG-PON1) |
| Throughput | 9.953 Gbps Down / 2.488 Gbps Up |
| Optical Class | N1 (Standard Power) |
| Tx Wavelength | 1577nm (EML) |
| Rx Wavelength | 1270nm (APD Burst Mode) |
| Connector Type | Simplex SC/UPC |
| Max Split Ratio | Typically 1:64 |
| Operating Temperature | 0°C to 70°C (Commercial) |
| Voltage | 3.3V |
Advantages
The XG-PON OLT XFP N1 offers a practical balance of performance and cost. By selecting the N1 class, operators avoid paying for the extra amplification of N2a modules when the network topology doesn’t require it. This is ideal for well-planned urban networks where signal loss is predictable and within standard limits.
Additionally, the availability of this module in the XFP form factor is crucial for lifecycle management. It allows ISPs to maximize the ROI on their existing XFP-based OLT chassis, delaying the need for a full hardware fork-lift upgrade while still deploying next-generation 10G broadband services.
FAQ (Technical & Product Questions)
1. What is the difference between this N1 module and an N2a module?
The main difference is the optical power budget. N1 is the standard class (approx. 29dB budget), suitable for typical split ratios (1:64) and distances. N2a is a higher-power class (approx. 31dB budget) used for higher split ratios (1:128) or longer distances.
2. Can I use this XFP module in an SFP+ port?
No. XFP is physically larger than SFP+ and has a different electrical connector. They are not compatible. You must verify that your OLT equipment has XFP slots before purchasing.
3. Does this module work with standard GPON ONUs?
No. XG-PON uses different wavelengths (1577nm/1270nm) compared to GPON (1490nm/1310nm). You must use XG-PON ONUs at the customer premises. However, both services can coexist on the same fiber using external WDM filters.
4. Is this a symmetric 10G transceiver?
No. This is an XG-PON module, which provides 10Gbps download and 2.5Gbps upload. For symmetric 10G/10G, you would need XGS-PON technology (and likely an SFP+ form factor, as XGS-PON XFP modules are rarer).
5. What type of fiber connector does it take?
It uses a simplex SC/UPC connector. Ensure your fiber patch cables are single-mode and terminated with SC/UPC (Blue) connectors, not APC (Green) unless specified by your specific network design, though the module interface itself is standard UPC.
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