Overview
The 10G Symmetric EPON OLT XFP PR30 Transceiver is a carrier-grade optical module designed to drive the next generation of high-bandwidth fiber access networks. Engineered for “Symmetric” operation, it delivers equal 10.3125 Gbps speeds for both downstream and upstream traffic, eliminating the upload bottlenecks common in legacy PON technologies. This module is essential for Service Providers offering gigabit-plus packages to enterprises and high-density residential areas.
Packaged in the robust XFP form factor, this transceiver is designed for Optical Line Terminals (OLTs) that utilize the XFP interface for 10G PON cards. It features a cooled 1577nm EML laser and a high-sensitivity 1270nm APD receiver capable of handling burst-mode traffic from multiple ONUs. With a PR30 link budget, it ensures stable connectivity over passive optical splitters up to 20km.
Key Features
- Symmetric 10G Capability: Provides 10Gbps capacity in both directions (Upload and Download).
- Standard Compliance: Fully meets IEEE 802.3av 10GBASE-PR30 specifications.
- XFP Form Factor: Hot-pluggable XFP footprint with SC/UPC receptacle.
- High Power Budget: PR30 Class (approx 29dB budget) supports 1:32 split ratios at 20km.
- Advanced Diagnostics: Digital Diagnostic Monitoring (DDM) interface compliant with SFF-8472.
- Wavelengths: Transmits at 1577nm (Continuous) and Receives at 1270nm (Burst).
Applications
This module allows operators to maximize the potential of their fiber plant:
- Business Connectivity: Offering symmetric Service Level Agreements (SLAs) (e.g., 2Gbps/2Gbps) to commercial clients.
- FTTH/FTTB: Future-proofing residential networks for 8K video streaming, cloud gaming, and large file backups.
- Mobile Backhaul: Connecting small cells and macro base stations with low-latency, high-capacity fiber links.
- Campus Area Networks: Linking multiple buildings in university or hospital campuses with high-speed symmetric trunks.
Specifications
| Parameter | Value |
|---|---|
| Form Factor | XFP (OLT) |
| Downstream Rate | 10.3125 Gbps |
| Upstream Rate | 10.3125 Gbps |
| Standard | IEEE 802.3av (10GBASE-PR30) |
| Wavelength (Tx) | 1577nm (EML) |
| Wavelength (Rx) | 1270nm (APD) |
| Tx Power | +2 to +5 dBm |
| Rx Sensitivity | < -28 dBm |
| Distance | 20km |
| Connector | SC/UPC |
Optical Budget and Split Ratios
The PR30 classification is critical for network planning. It signifies a high power budget designed to overcome the insertion loss of passive optical splitters. This module typically supports a 1:32 split ratio at a full 20km distance, or a 1:64 split ratio at shorter distances (depending on fiber quality and patch losses). It provides the necessary optical margin to ensure error-free transmission in complex ODN (Optical Distribution Network) environments.
FAQ
1. What is the difference between Symmetric and Asymmetric 10G EPON?
Symmetric 10G EPON provides 10Gbps for both download and upload. Asymmetric 10G EPON provides 10Gbps download but only 1Gbps upload. This module is Symmetric, making it superior for applications requiring high upload speeds.
2. Does this module work with 1G EPON ONUs?
No. This module operates at specific 10G wavelengths (1577nm/1270nm). 1G EPON operates at different wavelengths (1490nm/1310nm). While the standards can coexist on the same fiber, a 1G ONU cannot communicate directly with this 10G OLT module.
3. Why does the Rx wavelength matter?
Symmetric 10G EPON uses 1270nm for upstream. Asymmetric uses 1310nm. You must ensure your ONUs are also “Symmetric” type (Tx 1270nm) to match this OLT. If you use an Asymmetric ONU (Tx 1310nm), the OLT will not see the signal.
4. Is an external power supply required?
No, the XFP module draws power directly from the OLT switch chassis through the XFP edge connector.
5. Can I use this in an SFP+ port?
No, the XFP form factor is physically larger than SFP+ and uses a different electrical pinout. It fits only in dedicated XFP ports.
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