A Cisco CWDM SFP is a hot-swappable input/output device that plugs into an SFP port or slot of a Cisco switch or router, linking the port with the fiber-optic network. The Cisco CWDM SFPs are multirate parts that support both Gigabit Ethernet and Fibre Channel (1 gigabit and 2 gigabit). We supply the CWDM-SFP-1390 equivalent transceivers that are 100% Cisco compatible..