The Cisco Coarse Wavelength-Division Multiplexing (CWDM) Gigabit Interface Converter (GBIC) Solution allows enterprise companies and service providers to provide scalable and easy-to-deploy Gigabit Ethernet services in their networks. The product set enables the flexible design of highly available multiservice networks.A Cisco CWDM GBIC is a hot-swappable input and output device that plugs into an 802.3z standard-compliant GBIC port or slot of a Cisco switch or router, linking the port with the fiber-optic network.