Green-GO GGO-INTERFACEX Audio Interface (2x 4-Wire and 1x 2-Wire)The Green GO InterfaceX links 2 wire or 4 wire analog intercom systems into the Green GO digital Ethernet network. This audio in out interface with contact closures connects to an existing matrix or other analog interfacing products. A 4 wire intercom can be connected to the dual in out 3 pin XLR ports. This allows two separate audio signals (or a stereo signal) to be injected into the Green GO network and transmitted to any other location on the same