The Cisco 100BASE-FX Small Form-Factor Pluggable (SFP) Fast Ethernet Interface Converter (GLC-GE-100FX=) is a hot-swappable device that plugs into a Gigabit Ethernet SFP port on Cisco Catalyst 3750 Series, 3560 Series, and 2970 Series switches. The Cisco SFP provides full-duplex 100-Mbps connectivity between switches over multimode fiber (MMF) infrastructures. It offers investment protection and an easy migration path for customers moving to Gigabit Ethernet connections in the future. The 100BASE-FX SFP operates on ordinary multimode fiber optical link spans of up to 2 kilometers in length. Customers implementing Cisco 100BASE-FX SFP can use 1000BASE-X SFPs in the future (including SX, LX/LH, ZX, and coarse wavelength-division multiplexing SFPs). Main features include the following Hot-swappable when deployed, the switch or router does not have to reboot Supports the “pay-as-you-populate” model Interchangeable with other 100BASE-X SFPs on the same line card Supports the Cisco quality ID feature that enables the switch or router to identify whether or not the SFP is a Cisco qualified SFP Optically interoperable with respective 100BASE-X Ethernet interfaces on the same link Please note: networking components such as switches, routers, UPS and wireless devices require that speeds & standards be consistent throughout the network to gain optimum performance.