How do desktop videoconferencing systems use the B and D channels of ISDN?
A. Voice, video and application data are transmitted and received by the videoconferencing systems using the B channels. The B channels are not split (application data on one, video on the other), but rather are essentially one large data path which the videoconferencing system uses to transmit and receive all three data types. The D channel is used solely for call setup and management. No end-to-end user data is transmitted over the D channel.
