Cisco GLC-LH-SM-20 - compatibele SFP-transceivermodule met DOM - 1000BASE-LX/LH SFP 1310nm 20km LC SMF

Network engineers upgrading campus or metropolitan area links often need a reliable optical module that works seamlessly with Cisco switches. The FS.COM GLC-LH-SM-20-C delivers exactly that: a hot-swappable SFP transceiver that matches the Cisco GLC-LH-SM-20 specifications, supporting Gigabit Ethernet over single-mode fiber up to 20 kilometers. With digital optical monitoring (DOM), you can track real-time parameters like optical power, temperature, and voltage, ensuring proactive network maintenance.

Key specifications

• Form Factor: SFP (Small Form-Factor Pluggable)
• Data Rate: 1.25 Gbps (Gigabit Ethernet)
• Wavelength: 1310 nm
• Maximum Transfer Distance: 20 km over single-mode fiber (SMF)
• Connector Type: LC Duplex
• Transceiver Standard: 1000BASE-LX/LH
• Digital Optical Monitoring (DOM): Yes
• Hot-Plug Support: Yes
• Operating Temperature: 0°C to 70°C
• Power Consumption: < 1W, 3.3V supply
• Laser Type: FP Laser
• Receiver Sensitivity: -23 dBm
• Transmit Power: -9.5 dBm to -3 dBm
• Standards Compliance: IEEE 802.3z

Why choose it

This transceiver is fully compatible with Cisco GLC-LH-SM-20, making it a cost-effective alternative without sacrificing performance. It undergoes rigorous testing to ensure compatibility with a wide range of Cisco switches and routers. The DOM feature provides valuable diagnostics, helping you avoid downtime by monitoring link health in real time. Its low power consumption and commercial temperature range make it suitable for standard enterprise environments.

Ideal use cases

• Connecting distribution and core switches in campus networks over single-mode fiber.
• Extending network reach up to 20 km between buildings or remote sites.
• Upgrading existing 1000BASE-SX multimode links to longer-distance single-mode connections.
• Deploying in Cisco-based enterprise, data center, or service provider networks where GLC-LH-SM-20 modules are specified.

Good to know

The module is hot-swappable, so you can insert or remove it without powering down the switch. It supports duplex LC connectors, which are common in single-mode fiber installations. For best performance, use with 9/125 µm single-mode fiber. The transceiver is compliant with IEEE 802.3z and supports digital diagnostics via the I2C interface. It is backed by FS.COM's compatibility guarantee and lifetime warranty.