Abstract: Video gateway apparatus, according to the present invention, for interworking between an internet protocol video data network and an integrated services digital network comprises a outer operatively associated with the internet protocol video data network for outputting video and control data associated with a video call originating in the internet network, at least one gateway switch coupled to the router and operatively associated with the integrated services digital network for outputting video and control data associated with a video call originating in the integrated services digital network, and at least one gatekeeper operatively associated with the router and the at least one gateway switch for translating between video telephone numbers assigned within said integrated services digital network and internet protocol addresses associated with said internet protocol video data network.