Cisco MGBSX1 Gigabit Ethernet SFP Transceiver

The Cisco MGBSX1 Gigabit Ethernet Mini-GBIC SFP Transceiver is a hot-swappable optical module that provides Ethernet fiber connectivity at 1 Gbps over multimode fiber. Operating at 850 nm, it uses a duplex LC connector and supports IEEE 802.3z 1000BASE-SX. Designed for Cisco switches, routers, and other SFP-enabled devices, it enables reliable fiber uplinks between switches, servers, and core network equipment. Distance performance depends on fiber type: up to 550 m on OM2 MMF, or up to 1,000 m with suitable fiber. Common applications include campus networks, data center connections, and backbone links where multimode fiber is deployed. Replacements include Cisco GLC-SX-MMD, GLC-SX-MM, and GLC-LH-SMD.