38. In a video communication network capable of providing textual data messages to a plurality of subscriber terminals throughout said network, at least a portion of said plurality of subscriber terminals comprising subscriber keystations, each of said subscriber keystations comprising a keyboard means for operator input of textual data mesages and associated data control signals to said network via said keyboard means and a video display means for providing a textual video display of at least keyboard generated data input to said network; the improvement comprising at least one message switching interface means for routing video conversational textual data messages throughout said network, a plurality of said keystations being operatively connected to said one message switching interface means, said one message switching interface means comprising mesage routing logic means and storage means operatively connected to said message routing logic means for providing message routing logic control signals and further comprising display control logic means and local video display storage means for locally storing video conversational textual data for providing a video display thereof to at least a pair of said keystations which are operatively connected together through said one interface means in a completed call in said network, said keyboard means comprising means for providing unique calling signals to said interface means for initiating calls to a designated keystation portion of said plurality of keystations in said network, said one interface means further comprising means for receiving said calling signals provided thereto for completing a call to said designated connected keystation, said message routing logic means comprising means for controlling the routing of said calling signals to said designated keystations to control the completion of said initiated calls, said display control logic means comprising means for providing on said pair of connected keystation video display means a video display of video conversational textual data transmitted between said connected keystations in said network with which said call is completed via said separate keyboard means associated with said pair of connected keystations, said one message switching interface storage means comprising means capable of retrievably storing at least one subscriber created inhibit list for each of said keystations connected to said one message switching interface means, each of a plurality of said keyboard means being capable of providing at least a different one of said subscriber created retrievably stored inhibit lists to said one message switching interface storage means for each of a corresponding plurality of associated ones of said subscriber keystations whereby a plurality of different unique inhibit lists may be retrievably stored in said one message switching interface storage means, said inhibit lists each being capable of comprising a plurality of different unique designated keystation identification codes each of which corresponds to a different keystation in said network, said message routing logic means comprising means responsive to a calling keystation keyboard means provided unique calling signal for said designated keystation portion for retrieving said inhibit list created by said designated keystation and selectively inhibiting the completion of said call to said designated keystation when it is free only in response to detection of a keystation identification code corresponding to said calling keystation in said retrieved inhibit list, whereby a subscriber keystation may selectively prevent the establishment of a video textual data conversation with predefined subscribers in the network.
38. In a video communication network capable of providing textual data messages to a plurality of subscriber terminals throughout said network, at least a portion of said plurality of subscriber terminals comprising subscriber keystations, each of said subscriber keystations comprising a keyboard means for operator input of textual data mesages and associated data control signals to said network via said keyboard means and a video display means for providing a textual video display of at least keyboard generated data input to said network; the improvement comprising at least one message switching interface means for routing video conversational textual data messages throughout said network, a plurality of said keystations being operatively connected to said one message switching interface means, said one message switching interface means comprising mesage routing logic means and storage means operatively connected to said message routing logic means for providing message routing logic control signals and further comprising display control logic means and local video display storage means for locally storing video conversational textual data for providing a video display thereof to at least a pair of said keystations which are operatively connected together through said one interface means in a completed call in said network, said keyboard means comprising means for providing unique calling signals to said interface means for initiating calls to a designated keystation portion of said plurality of keystations in said network, said one interface means further comprising means for receiving said calling signals provided thereto for completing a call to said designated connected keystation, said message routing logic means comprising means for controlling the routing of said calling signals to said designated keystations to control the completion of said initiated calls, said display control logic means comprising means for providing on said pair of connected keystation video display means a video display of video conversational textual data transmitted between said connected keystations in said network with which said call is completed via said separate keyboard means associated with said pair of connected keystations, said one message switching interface storage means comprising means capable of retrievably storing at least one subscriber created inhibit list for each of said keystations connected to said one message switching interface means, each of a plurality of said keyboard means being capable of providing at least a different one of said subscriber created retrievably stored inhibit lists to said one message switching interface storage means for each of a corresponding plurality of associated ones of said subscriber keystations whereby a plurality of different unique inhibit lists may be retrievably stored in said one message switching interface storage means, said inhibit lists each being capable of comprising a plurality of different unique designated keystation identification codes each of which corresponds to a different keystation in said network, said message routing logic means comprising means responsive to a calling keystation keyboard means provided unique calling signal for said designated keystation portion for retrieving said inhibit list created by said designated keystation and selectively inhibiting the completion of said call to said designated keystation when it is free only in response to detection of a keystation identification code corresponding to said calling keystation in said retrieved inhibit list, whereby a subscriber keystation may selectively prevent the establishment of a video textual data conversation with predefined subscribers in the network. 44. A video conversational communication network in accordance with claim 38 wherein the designated keystation content of each of said inhibit lists may be dynamically varied by said keyboard means which created said retrievably stored inhibit list by providing different keystation identification codes associated with said stored inhibit list to said message switching interface storage means.