will allow the use of the narrowband call control functionality to create broadband calls and the interleaving with broadband bearer control to establish multiple bearers for the call when the broadband terminal equipment is powered up the driver app in the personal computer pc establishes a signalling connection to the interworking unit for the telephony style functionality this connection will be made to an atm well known address which is stored in the app software driver this connection will be a long hold time switched virtual circuit svc that is a connection which will be held up until either the terminal is powered down or the atm switch network identifies a failure in the event of failure of the network the terminal will re establish another syc to the well known address when a telephony class call voice or voice and video is to be established the app driver will send a place call message to the swd the swd will generate a q931 based set up message to the voice server call processing vs this signalling is based on q931 for the terminal with extensions for broadband requirements such as preferences the call preferences are information such as voice voice and video video and data these.