Description

Cisco GLC-SX-MMD Transceiver – 1000BASE-SX 850nm

The Cisco GLC-SX-MMD Transceiver is a Gigabit Ethernet SFP module designed for connecting compatible network switches and other networking equipment over multimode fiber-optic cable. Operating at an 850nm wavelength, this 1000BASE-SX transceiver is suitable for short-range fiber links in business networks, server rooms, enterprise environments, and data communication systems.

Whether you are expanding an existing network or replacing a compatible optical module, the Cisco GLC-SX-MMD provides a practical option for Gigabit Ethernet connectivity. Its supported link distance depends on the multimode fiber type, cable quality, and network equipment used.

Key Features of the Cisco GLC-SX-MMD

• Model: Cisco GLC-SX-MMD
• Ethernet standard: 1000BASE-SX
• Data rate: 1 Gigabit Ethernet
• Optical wavelength: 850nm
• Fiber type: Multimode fiber (MMF)
• Maximum distance: Up to 550 meters on supported multimode fiber
• Form factor: Small Form-Factor Pluggable (SFP)
• Connector: Duplex LC, verify the exact product specification before ordering
• Monitoring: Digital optical monitoring (DOM) support on the specified model
• Typical applications: Switch-to-switch links, enterprise networking, and fiber uplinks

Refer to the manufacturer’s documentation to confirm the exact specifications and supported operating conditions for your unit.

Reliable Gigabit Ethernet Fiber Connectivity

The Cisco GLC-SX-MMD Transceiver helps connect compatible networking devices through fiber-optic cabling. Fiber links are useful when network equipment is separated by distances or environments where copper Ethernet cabling is not the preferred option.

This 1000BASE-SX SFP is intended for multimode fiber installations. The achievable distance varies with the fiber grade: Cisco documentation lists distances up to 550 meters for certain 50-micron multimode fiber types, while other fiber types may support shorter distances.

For a successful installation, check the fiber type, connector, optical specifications, and switch compatibility at both ends of the link.

Where Can You Use This 1000BASE-SX Transceiver?

The Cisco GLC-SX-MMD can be used in compatible network environments such as:

• Business and enterprise Ethernet networks
• Network switch fiber uplinks
• Server rooms and equipment racks
• Campus network connections
• Building-to-building links within supported fiber distances
• Network infrastructure upgrades and replacement projects

Always verify the distance and fiber specifications for your particular installation before purchasing.

Compatibility and Installation

Before ordering the Cisco GLC-SX-MMD Transceiver, confirm that your switch or networking device supports this specific SFP model. Not every SFP slot supports every transceiver, even when the physical form factor looks similar.

Also verify that the existing fiber cable is multimode fiber and that its connectors match the transceiver. For a fiber link, both ends must use compatible optical standards and suitable equipment settings.

For technical details, review the official Cisco SFP Modules for Gigabit Ethernet Applications Data Sheet.

Why Choose 52Networks?

52Networks provides networking products for IT teams, businesses, system integrators, and network installation professionals. When selecting an optical transceiver, accurate model identification and compatibility checks help reduce installation delays and avoid ordering the wrong module.

Explore our 52Networks networking products to find additional networking components for your infrastructure requirements.

Frequently Asked Questions

What is the Cisco GLC-SX-MMD Transceiver?

It is a Gigabit Ethernet SFP optical module that uses the 1000BASE-SX standard to transmit data over compatible multimode fiber.

What wavelength does the GLC-SX-MMD use?

The module operates at an 850nm optical wavelength.

What is the maximum supported distance?

The listed reach is up to 550 meters on supported multimode fiber. The actual distance depends on the fiber grade and installation conditions.

Does it work with every Cisco switch?

No. Compatibility depends on the specific switch model, software, and supported transceiver list. Check the manufacturer’s compatibility documentation before ordering.

Can I use it with single-mode fiber?

The GLC-SX-MMD is designed for multimode fiber. Choose a transceiver designed for single-mode fiber if your installation requires it.

What should I check before purchasing?

Confirm the exact model, switch compatibility, fiber type, connector, and required link distance. If you are replacing an existing module, compare its part number and optical specifications.

Order the Cisco GLC-SX-MMD Transceiver from 52Networks when you need a suitable Gigabit Ethernet optical module for a compatible multimode fiber installation.