A Cisco CWDM SFP is a hot-swappable input and output device that plugs into an SFP port or slot of a Cisco switch or router, linking the port with the fiber-optic network.PRODUCT FEATURES:Gigabit Ethernet 1.25-Gbps full-duplex links with an optical link budget of 29 dB;Fiber Channel 1.06-Gbps and 2.12-Gbps full-duplex links with an optical link budget of 28 dB.