SFP Fiber Transceiver Cisco GLC-LH-SMD — 1000BASE-LX/LH, LC, 1 Gbit/s, Hot-swappable

The Cisco GLC-LH-SMD is a hot-swappable SFP fiber transceiver module that supports 1000BASE-LX/LH operation over single-mode fiber. With an LC duplex connector and a maximum data rate of 1 Gbit/s, this module is designed for use with Cisco Catalyst and ME series switches and routers to provide long-distance Gigabit Ethernet links. The module follows the SFP (Small Form-factor Pluggable) industry standard and plugs directly into compatible Gigabit Ethernet ports or slots to enable optical connectivity and routine network upgrades.

Advantages

The GLC-LH-SMD module offers a compact SFP form factor that enables flexible deployment in dense networking environments while remaining hot-swappable to reduce service interruptions. Its single-mode 1000BASE-LX/LH operation provides extended reach compared with multimode optics, making it suitable for longer fiber runs. The LC connector and standard electrical/optical interfaces ensure compatibility with a wide range of Cisco networking equipment and third-party fiber infrastructure components.

Suitable for

• Establishing long-distance Gigabit Ethernet links over single-mode fiber
• Upgrading switch and router ports to optical connectivity in data centers and enterprise networks
• Interconnecting Cisco Catalyst and ME series devices with fiber infrastructure
• Field replacement or hot-swap scenarios to minimise downtime during maintenance

Key specifications

• Form factor: SFP (Small Form-factor Pluggable)
• Optical standard: 1000BASE-LX/LH
• Connector type: LC duplex
• Maximum data transfer rate: 1 Gbit/s
• Fiber type: single-mode fiber (SMF)
• Hot-swappable: yes

How to use

Power down is not required for insertion or removal when using a compatible device that supports hot swapping; align the SFP module with the port and push it into the SFP slot until it clicks into place. Connect LC duplex single-mode fiber cabling to the module, observing correct TX/RX orientation. After insertion, verify link status and configuration via the switch or router management interface and adjust port parameters as needed to match network settings.

Recommendations

Handle the transceiver using ESD-safe procedures and keep protective caps on the optical interfaces until ready to connect. Use single-mode fiber patch cords with an appropriate launch power and attenuation for the required link distance, and verify compatibility with the target Cisco device firmware and optics support list before deployment.