10G EPON OLT XFP Transceiver | Asymmetric 10G/1G | PR30/PRX30 | Tx 1577nm

Overview

The 10G EPON OLT XFP Asymmetric Transceiver is a specialized optical module designed for the headend (OLT) of passive optical networks. It is engineered to support the Asymmetric 10G EPON standard (10GBASE-PRX30), providing a massive **10.3125 Gbps downstream** link to subscribers while receiving a **1.25 Gbps upstream** link. This asymmetric configuration is the most cost-effective path for upgrading existing 1G EPON networks to 10G download speeds, perfectly matching residential broadband traffic patterns.

Packaged in the XFP form factor, this module is compatible with specific OLT chassis that utilize XFP ports for their 10G interfaces. It features a high-power 1577nm EML laser for long-distance transmission and a high-sensitivity 1310nm burst-mode receiver to handle upstream traffic from multiple ONUs. With a PR30/PRX30 power budget, it supports split ratios up to 1:64 and distances up to 20km.

Key Features

• Asymmetric Bandwidth: 10Gbps Downstream / 1Gbps Upstream, ideal for residential internet services.
• XFP Form Factor: Designed for OLT line cards requiring the XFP mechanical interface (larger than SFP+).
• Standard Compliance: Fully compliant with IEEE 802.3av 10/1GBASE-PRX30 standards.
• High-Power Optical Budget: PR30 Class ensures reliable connections through optical splitters (1:32 or 1:64).
• Wavelength Plan: Tx 1577nm (EML) / Rx 1310nm (APD).
• Backward Compatibility: Uses 1310nm upstream, simplifying coexistence with legacy EPON optics if supported by the OLT system.

Applications

This module allows Service Providers (ISPs) to deploy “10 Gigabit” download speeds without the expense of symmetric 10G hardware:

• Residential Broadband Upgrades: Offering premium tiers (e.g., 2Gbps, 5Gbps, or 10Gbps download) to homes.
• Triple Play Services: Supporting bandwidth-heavy applications like 4K/8K IPTV and high-speed internet simultaneously.
• Cost-Sensitive Deployments: Reducing CAPEX by using less expensive asymmetric ONUs at the customer premises.
• Mixed Network Environments: Serving both high-speed 10G customers and standard 1G customers on similar infrastructure.

Specifications

XFP vs. SFP+ OLT Modules

While both perform the same optical function, they differ in physical size and electrical interface. XFP is an older, slightly larger form factor often found in earlier generations of 10G OLT chassis or specific high-density line cards that require better heat dissipation. You cannot plug an XFP module into an SFP+ slot, or vice-versa. Always check your OLT line card specifications before ordering.

FAQ

1. What is the difference between PRX30 and PR30?

In the context of Asymmetric 10G EPON, PRX30 specifically refers to the power budget for the “10G Down / 1G Up” configuration. PR30 usually refers to the Symmetric “10G Down / 10G Up” configuration. However, the optical power classes are effectively the same regarding link budget (approx. 29dB).

2. Can I use this OLT module with a Symmetric ONU?

No. A Symmetric ONU transmits upstream at 1270nm. This Asymmetric OLT module listens at 1310nm. They are incompatible. You must pair this OLT module with an Asymmetric (10/1G) ONU.

3. Why is the upstream speed only 1Gbps?

This is the “Asymmetric” standard. It allows ISPs to use cheaper optics (1310nm) for the upload path, significantly lowering the cost of the Customer Premises Equipment (CPE/ONU) while still providing 10Gbps download speeds.

4. Does this module support Digital Diagnostics (DDM/DOM)?

Yes, it supports standard digital diagnostics, allowing the OLT to monitor parameters like optical output power, receiver input power, and temperature in real-time.

5. What fiber cable should I use?

It requires Single Mode Fiber (SMF) with a Blue SC/UPC connector. Do not use Green (APC) connectors directly into the transceiver.