DMCO cards for the DM-MD16X16 must be installed by a Crestron-authorized technician, and new DM-MD16X16 switchers are shipped with the desired DMCO output card(s) installed.To configure a DM switcher complete with input and output cards, cables, and other peripherals, please use the DigitalMedia?? Switcher Configuration Tool.Are you upgrading an existing DM switcher that has older ???multi-gang???