Overview
The XGS-PON & GPON Combo OLT SFP+ Transceiver is a cutting-edge optical module designed for Service Providers (ISPs) looking to upgrade their networks from Gigabit PON to 10-Gigabit PON without disrupting existing infrastructure. This Multi-Protocol Module (MPM) integrates both XGS-PON and GPON technologies into a single SFP+ form factor, allowing for simultaneous transmission over the same Passive Optical Network (ODN).
Rated Class C+, this module offers a high optical power budget suitable for high split ratios (up to 1:128) and long distances (20km). The Industrial Temperature (I-Temp) rating of -40°C to +85°C ensures reliability in harsh environments, such as unconditioned outdoor street cabinets.
Key Features
- Dual-Mode Operation: Supports XGS-PON (10G Symmetrical) and GPON (2.5G Down/1.25G Up) concurrently.
- Form Factor: SFP+ (Small Form-factor Pluggable Plus).
- Optical Class: Class C+ (High transmit power and sensitivity for 32dB+ link budget).
- Wavelengths (4-Channel WDM):
- XGS-PON: Tx 1577nm / Rx 1270nm
- GPON: Tx 1490nm / Rx 1310nm
- Temperature Range: Industrial (-40°C to +85°C).
- Connector: Simplex SC/UPC.
- Distance: 20km over Single Mode Fiber (SMF).
Applications
- Smooth Migration: Upgrade users to 10G XGS-PON individually while keeping other users on standard GPON on the same fiber tree.
- FTTH/FTTB: Fiber to the Home/Building services delivering Gigabit and Multi-Gigabit speeds.
- Outdoor Deployments: Suitable for street cabinets and non-temperature-controlled central offices due to I-Temp resilience.
- Triple Play Services: High bandwidth for Voice, Data, and High-Definition Video streaming.
Technical Specifications
| Parameter | XGS-PON Channel | GPON Channel |
|---|---|---|
| Data Rate (Downstream) | 9.953 Gbps | 2.488 Gbps |
| Data Rate (Upstream) | 9.953 Gbps | 1.244 Gbps |
| Tx Wavelength | 1577 nm | 1490 nm |
| Rx Wavelength | 1270 nm | 1310 nm |
| Tx Power (Class C+) | +3 to +7 dBm | +3 to +7 dBm |
| Connector Type | Simplex SC/UPC | |
| Max Split Ratio | 1:128 | |
| Operating Temperature | -40°C to +85°C (Industrial) | |
Why Use a Combo OLT Module?
Traditionally, upgrading to 10G PON required adding a separate WDM1r combiner element and new OLT hardware. The Combo PON SFP+ eliminates the need for external WDM combiners by integrating the combiner inside the transceiver itself. This saves rack space, reduces insertion loss, and simplifies cable management. Operators can serve legacy GPON ONUs and new XGS-PON ONUs on the same splitter fiber.
FAQ
1. Do I need to replace my existing GPON ONUs?
No. This Combo module allows you to keep existing GPON ONUs running on the 1490/1310nm wavelengths while simultaneously adding new XGS-PON ONUs on the 1577/1270nm wavelengths. Both coexist on the same fiber.
2. What OLT equipment is this compatible with?
This module is designed for OLT equipment that supports SFP+ Combo interfaces. Common compatible vendors include Huawei, ZTE, Nokia, and FiberHome, provided the specific OLT board supports the Combo MPM mode.
3. What does “Class C+” mean?
Class C+ refers to the optical power budget. It indicates a higher transmit power and receiver sensitivity than Class B+ or C. This allows the signal to pass through more splitters (e.g., 1:64 or 1:128 split) or travel longer distances while maintaining signal integrity.
4. Why is Industrial Temperature important?
OLT equipment is often deployed in outdoor street cabinets or remote nodes where temperatures can drop below freezing or rise significantly. Commercial modules (0-70°C) may fail in these conditions, but this I-Temp module is tested to operate reliably from -40°C to +85°C.
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