Cisco GLC-SX-MMD Transceiver Module - 1000BASE-SX SFP 850nm 550m MMF DOM Refurbished Cisco

The Cisco GLC-SX-MMD is a 1000BASE-SX SFP transceiver module designed for short-range Gigabit Ethernet connectivity over multimode fiber (MMF). It operates at a wavelength of 850nm and supports distances up to 550 meters over OM2 fiber and up to 1km over laser-optimized OM3/OM4 fiber. This hot-swappable module features a duplex LC interface and is a standard component for connecting switches and routers to local area networks.

The "D" in the product name indicates support for Digital Optical Monitoring (DOM), providing real-time access to operating parameters such as temperature, voltage, and optical power levels. It is an industry-standard solution for reliable, high-speed data transmission within data centers and enterprise wiring closets.