What should I do if I want a By-me control unit to function as a video intercom?

The By-me control unit can function as either a control unit for home automation+SAI burglar alarm, or as a simple video intercom monitor (only on ELVOX video intercom systems), and with both functions, depending on whether the electronic board to manage one or the other function is purchased, or both are purchased and applied to the display. For the By-me wall-mounted unit (not the flush-mounted unit) the monitor already has one of either boards, or both boards (according to the part number, i.e., 01950, 01951, etc.).