Overview
The Asymmetric 10G EPON ONU SFP+ Transceiver is a cost-effective optical module designed to upgrade network speeds without the higher cost of full symmetrical hardware. It adheres to the IEEE 802.3av (10/1GBASE-PRX30) standard, delivering ultra-fast 10 Gbps downstream bandwidth while maintaining a standard 1 Gbps upstream link. This configuration is ideal for residential broadband and typical office use where download demand significantly outpaces upload needs.
Operating with a robust PR30 optical power budget, this module supports split ratios up to 1:64 and distances up to 20km. It utilizes a 1310nm DFB laser for the 1.25Gbps upstream channel and a high-sensitivity 1577nm APD for the 10.3Gbps downstream channel. This distinctive wavelength plan allows it to coexist with legacy EPON networks while providing a massive boost in download capacity.
Key Features
- Asymmetric Bandwidth: Delivers 10Gbps Download / 1Gbps Upload, perfectly matching typical internet usage patterns (streaming, downloading).
- Cost-Effective Upgrade: Provides 10G downstream capability at a lower price point than symmetric modules.
- Standard Compliance: Fully compliant with IEEE 802.3av 10/1GBASE-PRX30 specifications.
- Wavelength Plan: Tx 1310nm (1G) / Rx 1577nm (10G).
- High Power Budget (PR30): Ensures reliable connection through multiple splitters (1:32 or 1:64) and up to 20km range.
- SFP+ Form Factor: Hot-pluggable design for quick installation into ONUs, gateways, or customer-premises equipment.
Applications
This module is the workhorse for next-generation broadband deployment:
- Residential Gigabit+ Services: Enabling ISPs to offer “10 Gigabit” marketing speeds (downstream) to homes.
- IPTV & 8K Streaming: Providing the massive downstream pipe required for multiple high-definition video streams.
- SME Internet Access: Suitable for small businesses that need fast downloads for data retrieval but have standard upload requirements.
- Hybrid Network Migration: Allows operators to upgrade customers to 10G downstream gradually without replacing the entire upstream infrastructure immediately.
Specifications
| Parameter | Value |
|---|---|
| Form Factor | SFP+ (ONU Stick) |
| Downstream Speed | 10.3125 Gbps (Rx) |
| Upstream Speed | 1.25 Gbps (Tx) |
| Standard | IEEE 802.3av (10/1GBASE-PRX30) |
| Optical Class | PR30 (High Budget) |
| Tx Wavelength | 1310nm (DFB Laser) |
| Rx Wavelength | 1577nm (APD Receiver) |
| Connector | Simplex SC/UPC |
| Max Distance | 20km |
| Operating Temperature | 0°C to 70°C |
Asymmetric vs. Symmetric
The primary difference lies in the upstream (upload) speed. While the Symmetric version offers 10G up/10G down, this Asymmetric model offers 10G down/1G up. This design simplifies the laser optics (using mature 1G 1310nm technology), significantly reducing the cost per unit. For most residential users, whose ratio of download to upload traffic is often 10:1 or higher, this provides the most economical path to “10G” connectivity.
FAQ
1. Can I use this module if my OLT is Symmetric?
Most modern 10G EPON OLTs are “dual-rate” or capable of supporting both symmetric and asymmetric ONUs on the same PON port. However, you must verify that your OLT line card supports 10/1GBASE-PRX30 mode. The OLT must be able to receive the 1310nm (1G) signal.
2. Does this work with a standard 1G EPON OLT?
No. A standard 1G EPON OLT transmits at 1490nm. This module listens at 1577nm. You cannot connect this ONU module to a legacy 1G OLT.
3. What happens if I speed test this connection?
On a speed test, you will see results approaching 10,000 Mbps (10 Gbps) on the download side, but the upload side will be capped at approximately 1,000 Mbps (1 Gbps). This is normal behavior for asymmetric hardware.
4. Is the connector SC/APC or SC/UPC?
The standard interface is SC/UPC (Blue). If your fiber drop cable has a Green (APC) connector, you must use a coupler and a UPC-to-APC patch cord to convert it, or you risk damaging the transceiver’s lens.
5. Why does the URL mention 1270nm?
That is likely a labeling error in legacy listings. Asymmetric 10G EPON strictly uses 1310nm for the upstream to maintain compatibility with the standard. 1270nm is reserved for the 10G upstream in Symmetric mode.
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