FEATURES
Up to 1.25Gb/s Data Links
Hot-Pluggable
Single LC connector
Up to 120 km on 9/125μm SMF
1490nm DFB laser transmier
1550nm PIN photo-detector
Single +3.3V Power Supply
1.25 Gbps SM SF 120 km LC BIDI SFP Transceiver
The 1.25 Gbps SM SF 120 km LC BIDI SFP Transceiver is a highly reliable and long-distance optical transceiver module, engineered to meet the growing demands of high-performance networks. Designed for use over single-mode fiber (SMF), this transceiver supports bidirectional (BIDI) data transmission and achieves impressive reach of up to 120 kilometers, making it ideal for long-haul connectivity in telecom, enterprise, and ISP environments.
This module is compliant with IEEE 802.3z Gigabit Ethernet and SFP MSA (Multi-Source Agreement) standards, ensuring broad compatibility with various switches, routers, and optical networking equipment.
Key Features
1. High-Speed 1.25 Gbps Transmission
The transceiver supports data transmission at 1.25 Gbps, offering seamless and efficient network performance. It is ideal for:
Gigabit Ethernet (1000BASE-BX)
Fiber Channel applications
FTTx networks
Data center interconnects
This high-speed capability ensures low latency, high throughput, and reliable operation in mission-critical scenarios.
2. Long-Distance Reach – Up to 120 km
Engineered for long-haul communication, the transceiver supports data transmission over 120 kilometers of single-mode fiber. It is perfect for:
Inter-building connectivity
Metropolitan Area Networks (MAN)
Telecom backbone links
Remote monitoring and control systems
This long reach helps eliminate the need for repeaters or intermediate devices, resulting in cost savings and easier network deployment.
3. Bi-Directional (BIDI) WDM Technology
Using Wavelength Division Multiplexing (WDM), the transceiver transmits and receives data on a single fiber core by using two different wavelengths:
TX: 1550 nm
RX: 1490 nm
(or reversed depending on the pairing model)
This BIDI design:
Reduces fiber usage by 50%
Lowers cabling costs
Simplifies network infrastructure
4. LC Simplex Connector Interface
The module features a compact LC simplex connector, known for:
High-density deployments
Secure and durable connection
Easy installation in standard SFP slots
The LC connector is a widely accepted interface across telecom and enterprise-grade networking systems.
5. Digital Diagnostic Monitoring (DDM)
The transceiver includes Digital Diagnostic Monitoring (DDM) capabilities, which provide real-time information about:
Module temperature
Supply voltage
Laser bias current
Transmit and receive power levels
These diagnostics help in performance optimization and predictive maintenance.
6. Hot-Pluggable SFP Design
Conforming to SFP MSA, this module is hot-pluggable, meaning it can be inserted or removed without powering down the host device. This feature allows:
Easy maintenance
Quick upgrades
Minimal system downtime
7. Interoperability and Compatibility
The transceiver works seamlessly with equipment from top networking brands such as:
This wide compatibility ensures effortless integration into existing infrastructure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Data Rate | 1.25 Gbps |
| Transmission Distance | 120 km |
| Fiber Type | Single-mode (SMF) |
| Connector | LC Simplex |
| TX Wavelength | 1550 nm or 1490 nm |
| RX Wavelength | 1490 nm or 1550 nm |
| Power Budget | Up to 30 dB |
| Power Supply | +3.3V |
| Digital Diagnostics | Supported (DDM) |
| Operating Temperature | 0°C to 70°C (Commercial) |
| Standards | IEEE 802.3z, SFP MSA, RoHS |
Applications
Conclusion
The 1.25 Gbps SM SF 120 km LC BIDI SFP Transceiver is the ultimate solution for ultra-long-range, high-speed, single-fiber communications. Its use of BIDI WDM technology saves fiber resources, reduces operational costs, and simplifies network management. With robust performance, wide compatibility, and smart diagnostics, this module is a trusted choice for service providers, enterprises, and telecom operators seeking reliable and scalable optical connectivity.
