FEATURES.
Up to 1.25Gb/s Data Links
Hot-Pluggable
Single LC connector
Up to 120 km on 9/125μm SMF
1550nm DFB laser transmier
1310nm PIN photo-detector
Single +3.3V Power Supply
1.25 Gbps SM SF 120 km SC BIDI SFP Transceiver
The 1.25 Gbps SM SF 120 km SC BIDI SFP Transceiver is a high-performance, cost-effective optical transceiver module specifically designed for long-distance fiber optic communication. Built for single-mode fiber (SMF) using single-fiber bidirectional (BiDi) transmission, this module offers a remarkable reach of up to 120 kilometers, making it ideal for telecom, carrier-grade Ethernet networks, and other wide-area networking (WAN) applications.
Featuring a compact Small Form-Factor Pluggable (SFP) design and an SC connector, this BiDi transceiver supports Gigabit Ethernet and 1.25 Gbps optical interfaces. It uses Wavelength Division Multiplexing (WDM) technology to send and receive signals on different wavelengths over a single strand of fiber, reducing infrastructure costs while maximizing performance and efficiency.
Key Features
1. High-Speed 1.25 Gbps Transmission
This transceiver delivers 1.25 Gbps full-duplex data rates, supporting:
Gigabit Ethernet (1000BASE-BX)
Fiber Channel
Switch, router, and media converter applications
It ensures smooth and stable performance in environments demanding reliable high-speed data connectivity.
2. Extended Transmission Distance – 120 km
Designed for long-haul networking, this module can transmit data up to 120 kilometers over single-mode fiber. This makes it ideal for:
Telecom networks
City-wide surveillance
Campus or metropolitan area networks (MAN)
Remote base station backhaul
3. Wavelength Division Multiplexing (WDM) Technology
The module uses bidirectional WDM, enabling transmission and reception over a single fiber strand by utilizing two separate wavelengths—commonly:
TX: 1550nm
RX: 1490nm (or vice versa depending on the model)
This innovative approach allows for two-way communication on a single fiber, saving cost and space while maintaining signal quality.
4. SC Simplex Optical Interface
Equipped with an SC simplex connector, this transceiver simplifies installation and integration. SC connectors offer:
Push-pull latching
Stable performance
Compatibility with various SFP ports and patch panels
The SC design is known for durability and ease of use in both indoor and outdoor networking environments.
5. Digital Diagnostic Monitoring (DDM)
Built-in Digital Diagnostic Monitoring (DDM) functionality allows users to access real-time information about:
Transceiver temperature
Supply voltage
Laser bias current
Optical transmit and receive power
DDM enhances network reliability through proactive diagnostics and easier troubleshooting.
6. Hot-Pluggable Design
The hot-swappable nature of this SFP module enables seamless upgrades or replacements without powering down the entire system. This ensures:
Reduced downtime
Convenient maintenance
Enhanced network flexibility
7. Compliance and Compatibility
This module is fully compliant with industry standards, including:
SFP Multi-Source Agreement (MSA)
IEEE 802.3z (1000BASE-BX)
RoHS
Class 1 laser safety
It offers broad interoperability with a wide range of networking equipment, including switches, routers, and media converters from leading brands like Cisco, Ubiquiti, MikroTik, D-Link, HP, and more.
Technical Specifications
| Feature | Specification |
|---|---|
| Data Rate | 1.25 Gbps |
| Wavelength (TX/RX) | 1550nm / 1490nm or vice versa |
| Fiber Type | Single-mode (SMF) |
| Connector Type | SC Simplex |
| Transmission Distance | Up to 120 km |
| Interface | SFP (Hot-pluggable) |
| Digital Diagnostic Monitoring | Yes (DDM/DOM) |
| Operating Temperature | 0°C to 70°C (Commercial Grade) |
| Power Supply Voltage | 3.3V |
| Laser Type | DFB (Distributed Feedback Laser) |
| Power Budget | Typically 30 dB |
| Compliance | MSA, IEEE 802.3z, RoHS |
Applications
Conclusion
The 1.25 Gbps SM SF 120 km SC BIDI SFP Transceiver is the ideal choice for extended-distance single-fiber communication. It combines high-speed data transmission, long-range capability, compact design, and advanced diagnostics, offering a reliable and scalable solution for demanding network infrastructures. Whether you are upgrading a telecom backbone or extending your data center reach, this module delivers exceptional performance with cost-effective efficiency.
