LogiLink SFP BiDi transceiver-module 1.25G RX1550/TX1310 20 km LC

With a 20 km reach over a single strand of single-mode fiber, this LogiLink SFP BiDi transceiver delivers 1.25 Gbps throughput for long-distance links. It transmits at 1310 nm and receives at 1550 nm, using a single LC connector to halve your fiber infrastructure costs. Digital diagnostics and hot-plug capability make it a practical choice for enterprise and carrier networks.

Overview

The LogiLink SFP004 is a bidirectional (BiDi) SFP transceiver module compliant with the SFP MSA and IEEE 802.3z standards. It is designed for 1000BASE-BX20-U applications, supporting data rates up to 1.25 Gbps over distances up to 20 km on 9/125 µm single-mode fiber. The module operates on a single fiber strand, using wavelength division multiplexing: 1310 nm for transmit and 1550 nm for receive. This eliminates the need for paired fibers, reducing cabling costs and simplifying installation in point-to-point links.

What stands out

• BiDi technology: single-fiber operation with 1310 nm TX / 1550 nm RX
• 20 km maximum transmission distance on single-mode fiber
• 1.25 Gbps data rate for Gigabit Ethernet and Fibre Channel
• LC simplex connector for compact, high-density deployments
• Digital Diagnostic Monitoring (DDM/DOM) for real-time performance tracking
• Hot-pluggable SFP MSA compliant, works with a wide range of switches and routers
• DFB laser and PIN receiver ensure reliable signal integrity over long distances
• Operating temperature range 0°C to 70°C for standard environments

Technical details

• Transceiver type: SFP (Small Form-factor Pluggable)
• Data rate: 1.25 Gbps
• Wavelength: TX 1310 nm, RX 1550 nm
• Fiber type: Single-mode (SMF), 9/125 µm
• Connector: LC simplex
• Max distance: 20 km
• Application standard: 1000BASE-BX20-U
• Compliance: SFP MSA, IEEE 802.3z
• DDM/DOM: Yes
• Hot-pluggable: Yes
• Laser type: DFB
• Receiver type: PIN
• Supply voltage: 3.3 V
• Operating temperature: 0°C to 70°C

Our verdict

The LogiLink SFP004 is a cost-effective solution for extending Gigabit Ethernet over long distances using a single fiber. Its BiDi design, DDM support, and broad compatibility make it a reliable choice for network upgrades and new installations alike.