Cisco GLC-SX-MM Transceiver

Cisco GLC-SX-MM – High-Performance 1G SFP Transceiver for Short-Range Fiber Networks

The Cisco GLC-SX-MM is a 1000BASE-SX multimode fiber SFP transceiver designed to provide high-speed, short-range Gigabit Ethernet connectivity across enterprise, campus, and data center environments. Operating at a wavelength of 850nm, this compact and efficient transceiver enables reliable data transmission over OM1, OM2, OM3, or OM4 fiber, making it ideal for short-distance deployments of up to 550 meters.

As part of Cisco’s trusted optical module portfolio, the Cisco GLC-SX-MM integrates seamlessly with a wide range of Cisco networking hardware, including Catalyst switches, Nexus series, and UCS platforms. It ensures robust interoperability, real-time performance monitoring, and consistent uptime.

Key Features of Cisco GLC-SX-MM

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

• Speed: 1 Gigabit Ethernet (1000 Mbps)

• Standard: IEEE 802.3z 1000BASE-SX

• Fiber Type: Multimode Fiber (OM1 to OM4)

• Wavelength: 850nm

• Connector Type: LC duplex

• Maximum Distance:

  • 550 meters on OM2

  • 300 meters on OM1

  • 750+ meters on OM3/OM4 (with optimized setup)

• DOM Support: Optional (Digital Optical Monitoring)

• Hot-swappable: Yes

• Power Consumption: Low (<1W)

Optimized for Short-Range Enterprise Connectivity

The Cisco GLC-SX-MM is optimized for short-range fiber deployments where copper cables can’t deliver consistent signal quality or are prone to electromagnetic interference (EMI). It’s ideal for linking switches within the same building, across floors, or between closely located data rooms. Its small form factor allows for high port density on Cisco switch blades, saving valuable rack space and maximizing scalability.

Thanks to its hot-swappable nature, the Cisco GLC-SX-MM can be inserted or removed without disrupting operations, making it perfect for production environments that require minimal downtime.

Use Cases of Cisco GLC-SX-MM

• Fiber uplinks from Cisco Catalyst 2960 or 3750 access switches

• Short-range connections between switches within wiring closets

• Server-to-switch links in data centers

• Access layer aggregation in campus networks

• Connecting high-speed storage within the same zone

Whether you’re upgrading to fiber for noise reduction, increasing reliability, or meeting distance limitations of copper, the Cisco GLC-SX-MM fits seamlessly.

Reliable Cisco Compatibility

One of the most valuable benefits of the Cisco GLC-SX-MM is its full compatibility with Cisco IOS software, hardware platforms, and diagnostic tools. When deployed, the transceiver is instantly recognized by Cisco devices, eliminating compatibility concerns often associated with third-party optics.

With support for Digital Optical Monitoring (DOM), network admins can track real-time data such as temperature, signal power levels, and operating voltage. This proactive monitoring helps ensure the optical link’s integrity and allows you to prevent failures before they affect users.

Energy Efficiency and Low Operational Cost

The Cisco GLC-SX-MM is engineered with energy efficiency in mind. It consumes less than 1 watt of power while delivering consistent performance. Over time, this helps reduce your overall energy footprint—particularly beneficial for organizations managing hundreds of optical ports across large networks.

Additionally, its longevity and resilience mean fewer replacements, fewer support tickets, and lower TCO (Total Cost of Ownership).

High Scalability for Growing Networks

As your organization scales, the Cisco GLC-SX-MM provides a reliable path to expand fiber infrastructure without needing drastic architectural changes. Because it operates within standardized fiber lengths and connector types, it supports rapid deployment and easy replacement.

From supporting core-to-distribution switch links to direct device uplinks, it provides foundational connectivity that meets the performance needs of today and the scalability demands of tomorrow.

Why Choose Cisco GLC-SX-MM?

• Field-Proven: Deployed globally across millions of enterprise networks

• Reliable Cisco Support: Backed by Cisco’s warranty and customer service

• Simple Deployment: Plug-and-play installation

• Flexible Fiber Compatibility: Works with OM1 to OM4 MMF

• Ideal for Expansion: Perfect for phased upgrades from copper to fiber

• Cost-Effective: Affordable option with high long-term value

Whether you’re replacing aging optics or deploying a new network, the Cisco GLC-SX-MM gives you confidence, speed, and performance—without the complexity.