Lightwin 155 Mbps SFP BIDI-transceiver, 1550nm TX / 1310nm RX, 20km, DDM, LC-simplex, singlemode (LWO-SFP100-5531-20)

Most SFP modules force you to run two fibres for a single link, but the Lightwin LWO-SFP100-5531-20 collapses that into one LC simplex connection. By transmitting at 1550 nm and receiving at 1310 nm over the same strand, it halves your fibre infrastructure while keeping full 155 Mbps Fast Ethernet throughput up to 20 km. Digital diagnostics are built in, so you can monitor temperature, voltage, laser bias and optical power in real time from the switch CLI or your NMS. This is not a generic clone: it is an MSA-compliant, hot-pluggable BIDI module with a DFB laser and PIN photodiode, factory-coded for seamless integration into most major switch and router platforms.

Highlights

• Single-fibre BIDI operation: 1550 nm TX / 1310 nm RX on LC simplex
• 20 km reach on standard 9/125 µm single-mode fibre
• 155 Mbps Fast Ethernet data rate, MSA compliant and hot-pluggable
• DDM/DOM support for live optical and electrical monitoring
• DFB laser + PIN photodetector for stable, low-jitter transmission
• Commercial temperature range 0 °C to 70 °C, 3.3 V supply

In daily use

Deploy this module wherever you need to extend a Fast Ethernet link across a campus, between buildings, or along a metro fibre ring without burning two strands. The LC simplex connector makes patching quick and foolproof, while the 20 km budget gives you plenty of margin for splices and patch panels. Because it is hot-pluggable, you can insert or remove it without powering down the switch, and the DDM interface lets your network team spot degrading links before they cause outages. It works with any MSA-compliant SFP slot, so it drops straight into existing Cisco, Juniper, HP, Huawei, MikroTik and other platforms that accept standard SFPs.

Full specifications

• Brand: Lightwin
• Model: LWO-SFP100-5531-20
• Form factor: SFP (Small Form-Factor Pluggable)
• Transceiver type: BIDI SFP
• Data rate: 155 Mbps (Fast Ethernet)
• Wavelength: 1550 nm TX / 1310 nm RX
• Fibre type: Single-mode (SMF), 9/125 µm
• Connector: LC simplex (single fibre)
• Max distance: 20 km
• DDM: Yes (Digital Diagnostic Monitoring)
• Laser: DFB (Distributed Feedback)
• Photodetector: PIN
• Supply voltage: 3.3 V
• Operating temperature: 0 °C to 70 °C
• Compliance: MSA, RoHS
• Hot-pluggable: Yes
• Duplex mode: Simplex (bi-directional)

Final note

For networks where fibre count is limited or you simply want to cut cabling costs, the Lightwin LWO-SFP100-5531-20 is a dependable, standards-based BIDI SFP that delivers full Fast Ethernet performance over a single strand with the visibility you need from DDM.