Spec Sheet Preview: The Alpha Communications® / Elvox 5556/004 video distributor unit is used with the 5601 and 5651 series video-intercom systems. The 5556/004 is used when the video signal from the lobby entry camera(s) must be split (distributed) to several coaxial cables. T he 5556/004 gets its DC power from the system's power supply. All 5556/004 connections are positive screw terminal and coax clamp connector type. Each 5556/004 has four (4) video outputs. When multiple 5556/004's are used, for systems requiring&nb …