StarTech SFP Transceiver Module GLC-LH-SMD Compatible 1000BASE-LH 1GbE LC 20km 1310nm DDM

The StarTech SFP Transceiver Module GLC-LH-SMD Compatible 1000BASE-LH 1GbE LC 20km 1310nm DDM is a single-mode fiber SFP designed for 1 GbE networks. It supports 1000BASE-LH operation over LC duplex connectors at a wavelength of 1310 nm and provides a link reach up to 20 km. The module is hot-swappable and includes Digital Diagnostics Monitoring (DDM) to report operating parameters. It is compatible with Cisco-style GLC-LH-SMD ports and is supplied in a silver housing with low typical power consumption.

Advantages

This transceiver delivers predictable single-mode fiber connectivity for 1 GbE links with a maximum data transfer rate of up to 1.25 Gbps while consuming under 1 W of power. The 1310 nm wavelength and LC duplex interface provide standard interoperability for long-reach fiber runs up to 20 km. Built-in DDM allows remote monitoring of optical power, temperature and other key parameters. The hot-swappable SFP form factor facilitates maintenance and upgrades without powering down equipment.

Suitable for

• Connecting switches and routers over single-mode fiber for campus or metro links
• Extending 1 GbE network segments up to 20 km
• Replacing or upgrading Cisco-compatible GLC-LH-SMD ports
• Environments requiring remote optical diagnostics via DDM

Key specifications

• Data rate: up to 1.25 Gbps (1000BASE)
• Fiber type: Single-mode fiber
• Wavelength: 1310 nm
• Connector type: LC duplex
• Maximum reach: 20 km (12.4 miles)
• Power consumption: < 1 W (typical)
• Digital Diagnostics Monitoring: Yes
• Form factor: SFP (hot-swappable)
• Housing color: silver
• MTBF: approximately 2,722,277 hours

How to use

Insert the SFP transceiver into a compatible SFP slot on the switch or router until it latches, then connect LC duplex single-mode fiber patch cables to the module. If replacing an existing transceiver, hot-swap the unit by removing the old module and inserting the new one without powering down the host equipment. Monitor module status and optical parameters through your device management interface or use the module's DDM outputs for real-time diagnostics.

Usage recommendations

For reliable performance, use single-mode fiber rated for 1310 nm and good-quality LC connectors, verify link budgets for runs approaching 20 km, and confirm compatibility with the host device. Avoid bending or stressing fiber near the connector, and ensure proper ESD precautions when handling the module.