COMMUNICATIONS SYSTEM

摘要

A communications system comprising a plurality of subscriber units each connected to a communications network capable of delivering any one of a plurality of different signals on respective television channels. At least one subscriber unit is provided with a teletext receiver, and teletext signals are supplied on one television channel of the system. The subscriber unit is allocated exclusive use of one teletext sub-page, the content of which sub-page is responsive only to data signals supplied by the respective subscriber unit.