3Com 3c17131 enterprise networking (SuperStack / LinkBuilder / OfficeConnect / CoreBuilder families) Optical Transmission Module

The 3Com 3c17131 is a SuperStack 3 Switch 4300 1000BASE-SX single-port expansion module, providing a Gigabit multimode-fibre uplink for the SuperStack 3 Switch 4300 chassis. It fits into the 4300’s expansion-module bay, giving the switch a fibre backbone or inter-switch link running at Gigabit speed over short-reach multimode fibre (typically up to 550m), separate from the switch’s standard copper access ports. The SuperStack 3 Switch 4300 was a managed Layer 2/3 stackable switch used as a wiring-closet or small-backbone platform, and fibre expansion modules such as this let it reach beyond copper distance limits to a building’s core or a neighbouring switch. SuperStack 3 deployments of this generation remain in service across many established SME and enterprise networks, and a genuine spare such as this restores a fibre uplink after a module failure. Tech-Star (UK-based, shipped worldwide) stocks 3Com components to support ongoing network maintenance projects.