GLC-SX-MM Cisco 1000BASE-SX SFP Transceiver for MMF

Cisco GLC-SX-MM - Overview

The GLC-SX-MM is one of Cisco’s most widely used Gigabit SFP modules for short-range fiber connectivity. It’s hot-swappable, cost-effective, and compatible with a broad range of Cisco Catalyst, Nexus, and MDS platforms.

🔧 Key Specifications

• Form Factor: SFP (hot-swappable)
• Standard: IEEE 802.3z 1000BASE-SX compliant
• Wavelength: 850 nm (short wavelength laser)
• Connector: Duplex LC
• Fiber Type: Multimode fiber (MMF)
• Reach:
  • Up to 220 m on standard MMF (62.5 µm, FDDI-grade)
  • Up to 550 m on OM2/OM3 MMF (50 µm)
• Data Rate: 1 Gbps line rate
• Compatibility: Supported across Cisco Catalyst, Nexus, and MDS switches/routers
• Hot-Swappable: Yes, without disrupting system operation

🧩 Ideal Use Cases

• Enterprise LANs needing short-range Gigabit fiber uplinks
• Campus networks interconnecting wiring closets within a building
• Data centers for rack-to-rack or row-to-row Gigabit links
• SAN edge connectivity where 1G fiber is still in use