Cisco GLC-SX-MMD 1000BASE-SX SFP Transceiver Module, MMF (850nm), DOM
$ 62.71
Description Cisco GLC-SX-MMD 1000BASE-SX SFP Transceiver Module, MMF (850nm), DOM Cisco GLC-SX-MMD is a high-performance, hot-swappable SFP (Small Form-factor Pluggable) transceiver module designed for Gigabit-Ethernet deployments over multimode fiber. It supports the IEEE 802.3z 1000BASE-SX standard and enables cost-effective fibre links within enterprise, data-centre and wiring-closet environments. With a nominal wavelength of 850 nm, LC-duplex fibre connector, digital-optical monitoring (DOM) capability and support for link spans up to 550 m on 50 µm MMF, this module lets network administrators extend or upgrade their fibre connectivity while maintaining robust Cisco-platform compatibility. Product Features Hot-Swappable SFP Form Factor The GLC-SX-MMD module can be inserted or removed from a compatible host device without powering down the system, minimizing network downtime and simplifying serviceability. Multimode-Fibre (MMF) Support at 850 nm This transceiver operates on the 850 nm wavelength over multimode fibre (MMF) and supports link distances of up to 220 m on 62.5/125 µm FDDI-grade fibre, up to 275 m on 62.5/125 µm OM1, and up to 550 m on 50 µm OM2 fibre. Digital Optical Monitoring (DOM) / Digital Diagnostics Supports Digital Optical Monitoring (DOM) capability (also known as DDM) to provide real-time access to operating parameters such as optical output power, receive power, transceiver temperature and supply voltage — useful for proactive link monitoring. Broad Platform Compatibility Designed to be compatible with a wide range of Cisco switches, routers and other network equipment that support SFP ports — enabling flexibility in media type choice (copper, MMF, SMF) on a port-by-port basis. Product Specifications Form factor: SFP (Small Form-factor Pluggable) Standard: IEEE 802.3z 1000BASE-SX Wavelength: 850 nm nominal Fibre type: Multimode fibre (MMF) Connector: LC duplex (dual LC/PC) Supported link distances (example specifications): ~220 m on 62.5 µm FDDI-grade MMF ~275 m on 62.5 µm OM1 MMF ~500-550 m on 50 µm OM2 MMF (may vary depending on fibre quality) Power supply: 3.3V typical (SFP standard) Operating temperature: Standard 0 °C to 70 °C; extended/industrial variants (-40 °C to 85 °C) may exist. Usage & Deployment Tips Ensure the host SFP port supports the GLC-SX-MMD or equivalent Cisco-certified optics; verify compatibility via the switch/router vendor compatibility list. Use appropriate MMF cabling: verify fibre type (OM1, OM2, OM3) and end-face cleanliness and ensure patch cords/connectors are in good condition to achieve the specified distances. For runs beyond ~550 m or for future-proofing, consider single-mode fibre (SMF) transceivers instead. Monitor the module via DOM/diagnostics to catch issues such as signal degradation or overheating. Insert the module into the host while the port is disabled or idle if possible, and verify link establishment and speed negotiation once connected.
