Abstract: A data communications system provides for the transmission of television signals from a central station to a plurality of remote user stations and the transmission of security data from the user stations back to the central station. The downstream television signals and upstream security data are processed through a plurality of remote hub stations, each servicing several of the remote user terminal stations. The remote hub stations convert downstream television control data and programming signals for reception by the users serviced by that station. The remote hub station also receive security monitoring data transmitted from each user station and generate additional security data for the central station. In one embodiment, the remote hub processing station includes a plurality of converters, each transmitting downstream on a separate dedicated communication link to a remote user station.