Overview
The Asymmetric 10G EPON ONU SFP+ Transceiver is a high-performance optical module designed for the subscriber side (ONU/ONT) of next-generation Ethernet Passive Optical Networks. Unlike symmetric modules, this transceiver is optimized for residential and small business applications where download demand significantly outpaces upload requirements, offering a cost-effective path to 10-Gigabit connectivity.
Compliant with the IEEE 802.3av 10G-EPON standard, it supports a downstream data rate of 10.3125 Gbps and an upstream rate of 1.25 Gbps. The module features a PR30 optical power budget, ensuring robust signal transmission over distances up to 20km with high split ratios (typically 1:32 or 1:64). It utilizes a specialized BOSA (Bidirectional Optical Sub-Assembly) to transmit upstream data at 1310nm while receiving downstream data at 1577nm.
Key Features
- Asymmetric Bandwidth: Delivers 10Gbps downstream for bandwidth-heavy content (4K streaming, downloads) and 1Gbps upstream for standard user requests.
- SFP+ Form Factor: Fits into standard SFP+ ports on ONU devices, home gateways, or enterprise switches configured as ONUs.
- PR30 Power Class: High optical budget supports extended reach and reliable connectivity in passive optical networks with multiple splitters.
- Wavelength Filtering: Integrated filters separate the 1577nm downstream signal from the 1310nm upstream transmission.
- Wide Compatibility: Designed for interoperability with major 10G EPON OLT systems adhering to IEEE 802.3av.
- Low Power Consumption: Engineered for efficiency, crucial for customer-premises equipment that operates 24/7.
Applications
This transceiver is the critical link at the user end of a 10G-EPON network:
- FTTH (Fiber to the Home): Enabling gigabit-plus internet tiers for residential subscribers using existing fiber infrastructure.
- FTTB (Fiber to the Building): Connecting MDU (Multi-Dwelling Unit) switches to the main OLT, distributing bandwidth to individual apartments.
- Small Business Connectivity: Providing affordable high-speed downlink for businesses with moderate uplink needs.
- EPON Network Upgrades: Seamlessly upgrading specific high-value customers from 1G EPON to 10G EPON on the same fiber plant (coexistence requires appropriate OLT support).
Specifications
| Parameter | Value |
|---|---|
| Form Factor | SFP+ (ONU Application) |
| Standard Compliance | IEEE 802.3av (10/1GBASE-PRX30) |
| Downstream Rate (Rx) | 10.3125 Gbps |
| Upstream Rate (Tx) | 1.25 Gbps |
| Optical Budget Class | PR30 (High Power) |
| Tx Wavelength | 1310nm (Burst Mode) |
| Rx Wavelength | 1577nm (Continuous) |
| Connector Type | Simplex SC/UPC |
| Distance | Up to 20km |
| Operating Temperature | 0°C to 70°C |
Why Choose Asymmetric 10G EPON?
The Asymmetric 10G EPON ONU SFP+ represents a strategic upgrade choice. Most residential usage patterns are highly asymmetric, with users consuming far more data (video, downloads) than they generate. By deploying asymmetric modules, operators can deliver the “10G Marketing” speed for downloads while keeping CPE costs lower compared to fully symmetric 10G/10G optics.
Furthermore, the PR30 classification ensures that this module can handle the optical loss associated with standard PON splitters, making it a “drop-in” upgrade for many existing fiber distribution networks.
FAQ (Technical & Product Questions)
1. What is the difference between Symmetric and Asymmetric 10G EPON?
Symmetric 10G EPON provides 10Gbps for both download and upload. Asymmetric provides 10Gbps download but only 1Gbps upload. This module is Asymmetric, making it more cost-effective for residential use cases where high upload speeds are less critical.
2. Can I plug this into a regular 10G switch?
You can plug it into an SFP+ port on a switch, BUT the switch must support EPON ONU functionality or “MAC bypass” mode. Standard Ethernet switches usually do not speak the EPON protocol. This is typically used in specific ONU devices or carrier-grade switches designed for FTTx access.
3. Does this work with a GPON OLT?
No. EPON and GPON are incompatible standards. EPON uses IEEE standards (Ethernet based), while GPON uses ITU-T standards. You must connect this to a 10G EPON OLT.
4. What wavelengths does this use?
It transmits (upstream) at 1310nm and receives (downstream) at 1577nm. This 1577nm downstream wavelength is specific to 10G-EPON, allowing it to coexist with legacy 1G EPON (which uses 1490nm downstream) on the same fiber.
5. Is the connector SC/APC or SC/UPC?
The standard interface for the transceiver module itself is usually SC/UPC (Blue). However, the fiber wall plate in a home might be APC (Green). Always check the specific part number and your fiber patch cable to ensure the connector polish matches.
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