Cisco 1000BASE-LX/LH SFP transceiver module,

MMF/SMF, 1310nm\ GLC-LH-SMD

The Cisco GLC-LH-SMD is a hot-swappable, 1000BASE-LX/LH Gigabit Ethernet SFP transceiver module designed for both multimode (MMF) and single-mode fiber (SMF) applications. Operating at 1310nm, it delivers robust, long-distance connectivity ideal for a variety of enterprise, data center, and campus deployments.

Backed by Cisco’s renowned quality and compatibility standards, the GLC-LH-SMD is a trusted solution for extending network reach while maintaining efficiency and uptime.

Key Features:

• Standard: 1000BASE-LX/LH

• Form Factor: SFP (Small Form-Factor Pluggable)

• Wavelength: 1310 nm

• Transmission Distance:

  • Up to 10 km over single-mode fiber (SMF)

  • Up to 550 m over multimode fiber (MMF) (with mode conditioning patch cable)

• Connector Type: LC duplex

• Hot-swappable: Enables quick installation or replacement without disrupting the network

• Digital Optical Monitoring (DOM): Provides real-time diagnostics for critical parameters such as temperature, voltage, and optical power

Reliable and Flexible Fiber Connectivity

The GLC-LH-SMD provides enterprise-grade Gigabit Ethernet over long distances, making it ideal for:

• Campus networks with multiple buildings

• Business-critical server and storage connections

• Metropolitan area networks (MAN)

• Fiber-to-the-desk and access-layer uplinks

Its compatibility with both SMF and MMF ensures deployment flexibility, allowing network architects to adapt to existing fiber infrastructure or plan for scalable upgrades.

Built for Cisco Switches and Routers

Fully compatible with Cisco’s vast portfolio of switches, routers, and firewalls, the GLC-LH-SMD integrates seamlessly into:

• Cisco Catalyst switches (e.g., 2960, 3560, 3750, 9200, 9300, etc.)

• Cisco ISR/ASR routers

• Nexus data center platforms

This ensures maximum interoperability, reduced configuration effort, and enhanced lifecycle support.

Enhanced Network Monitoring with DOM Support

The built-in Digital Optical Monitoring (DOM) capability allows real-time monitoring of transceiver operating parameters, giving administrators better visibility into link performance. This proactive monitoring helps prevent outages and simplifies troubleshooting, making the GLC-LH-SMD a valuable asset in mission-critical environments.

Why Choose the Cisco GLC-LH-SMD?

• Enterprise-grade reliability and performance

• Cisco-certified compatibility

• Hot-swappable for minimal downtime

• DOM-enabled for proactive diagnostics

• Cost-effective solution for long-distance fiber connectivity

Conclusion

The Cisco GLC-LH-SMD 1000BASE-LX/LH SFP transceiver is a highly dependable and flexible optical module that supports long-range Gigabit Ethernet over both multimode and single-mode fiber. Designed to meet the needs of modern enterprise and data center networks, it combines performance, efficiency, and ease of use with Cisco’s trusted hardware ecosystem.

Device Type  :  SFP (mini-GBIC) transceiver module

Form Factor :  SFP

Wavelength : 1310nm

Connector : LC duplex

TX Power : -9.5 ~ -3dBm

Cisco GLC-LH-SMD SFP Industrial Temperature Range : -40 to 85°C (-40 to 185°F)

Max Data Rate : 1000Mbps

Max Cable Distance : 10km

Optical Components : FP 1310nm

Receiver Sensitivity : < -23dBm

Protocols : SFF-8472 MSA Compliant, IEEE 802.3ah-2004

Connectivity Technology  :  Wired

Cabling Type  :  1000Base-LX, 1000Base-LH

Data Link Protocol  :  GigE

Data Transfer Rate  :  1 Gbps

Max Transfer Distance  :  6.2 miles

Cisco GLC-LH-SMD SFP Features  :  Digital Optical Monitoring (DOM) support

Interfaces  :  1 x Ethernet 1000Base-LX/1000Base-LH – LC/PC single-mode x 2

SFP Width  :  0.5 in

Depth  :  2.2 in

SFP Height  :  0.3 in

Weight  :  2.65 oz

Service & Support  :  Limited warranty – 90 days

Min Operating Temperature :  23 °F

Cisco GLC-LH Max Operating Temperature  :  185 °F