The Plug-In Optical Add-Drop Multiplexer from MRV provides the simplest CWDM solution on the market. Together with MRV's Colored GBIC Modules, the Plug-In OADM cable provides complete solution for CWDM Networks. Simply plug the GBIC modules into any network switch or router (or transponder module), and interconnect via the OADM cables. With no further effort, a full CWDM system is achieved. This revolutionary new approach to CWDM allows, for simple configurations, the most cost effective solution for wave division multiplexing technology.