Cisco SFP (Mini-GBIC) Transceiver Module Single Mode Gigabit / GLC-LH-SMD=

The Industry Standard 1G SFP for SMF and MMF — 10 km Reach

The GLC-LH-SMD serves as a genuine 1000BASE-LX/LH SFP (Mini-GBIC) transceiver module designed for high-performance Gigabit Ethernet deployments. This specific module remains one of the most widely deployed optical transceivers across enterprise campus networks and data centers today. Furthermore, the 1000BASE-LX/LH SFP complies fully with the IEEE 802.3z standard to operate on standard single-mode fiber link spans up to 10 km. Moreover, to ensure your high-speed backbone remains stable, you can view our full range of transceivers for additional hardware options. Consequently, this module bridges both new single-mode infrastructure and existing installations in a single universal transceiver.

Dual-Fiber Flexibility — SMF and MMF in One Module

The GLC-LH-SMD supports 10 km on standard single-mode fiber (SMF) and up to 550 m on any multi-mode fiber (MMF). This delivers the broadest fiber compatibility available in the 1G SFP portfolio. Additionally, the flexibility of media choice supports a pay-as-you-populate model for superior investment protection. Specifically, network architects can mix fiber types across different ports without changing the underlying hardware platform. In addition, the 1310 nm wavelength and duplex LC connector make this module compatible with the vast majority of structured cabling plants already deployed. Choosing high-quality components ensures that you eliminate the need for costly infrastructure changes during your next network expansion.

Digital Optical Monitoring and Hot-Plug Flexibility

The GLC-LH-SMD includes Digital Optical Monitoring (DOM) capability to provide real-time visibility into critical operating parameters. Technicians can monitor transmit power, laser bias current, and module temperature directly through the management interface for proactive fault detection. Furthermore, the module features a hot-swappable design to maximize uptime and simplify serviceability during live operations. Specifically, this enables live insertion and removal without disrupting switch operations or requiring a device reboot. Finally, choosing the GLC-LH-SMD ensures that your Gigabit fiber infrastructure receives the reach and flexibility required for modern business demands. To ensure total compatibility with your existing hardware, you can browse our compatible switches to complete your network setup.

Key Features:

• 10 km SMF / 550 m MMF — Dual Fibre Compatibility — Operates up to 10 km on ITU-T G.652 single-mode fibre and up to 550 m on 62.5/50 µm multimode fibre — the most versatile 1G SFP in the Cisco portfolio
• 1310 nm Wavelength — 1000BASE-LX/LH Standard — Fully compliant with IEEE 802.3z 1000BASE-LX/LH standard, delivering 1.25 Gbps Gigabit Ethernet over duplex LC fibre at a universally compatible 1310 nm wavelength
• Digital Optical Monitoring (DOM/DDM) — Real-time Tx/Rx power, bias current, supply voltage, and temperature monitoring via the switch management interface for proactive optical link diagnostics
• Hot-Swappable — Pay-as-You-Populate — Live insertion and removal without switch downtime, with port-by-port media flexibility to mix SMF, MMF, and copper SFPs in the same chassis
• Cisco Quality ID — Genuine Certified Module — Full Cisco platform EEPROM certification, preserving host device warranty and ensuring zero compatibility warnings on all supported Cisco Catalyst, Nexus, ISR, and ASR platforms