RS-366 signaling interface video dialing module (VDM) for video ATM services is one of a components required for the enhanced functioning of the Cisco MC3810 series of multiservice access concentrators.Video over Asynchronous Transfer Mode (ATM) switched virtual circuits (SVCs) expands the capabilities of the Cisco MC3810 multiservice access concentrator to provide cost-effective, dynamic, and flexible videoconferencing system support. Using a plug-in video dialing module (VDM) to provide an RS-366 dialing interface to an H.320 video codec, the Cisco MC3810 automatically accepts dial-out requests from the video system. The codec connects to one of the Cisco MC3810 serial ports and also to the Cisco MC3810 RS-366 dial-up port.