Paging and mailbox system using terrestrial or satellite broadcast installations

摘要

The paging and mailbox system uses one or more satellite and/or terrestrial television transmitters, with the paging or electronic mailbox information transmitted as teletext signals inserted in the blanking intervals in the analogue video signals. The paging or electronic mailbox signals are decoded by the teletext decoder within each television receiver, for display on the screen. Preferably each individual subscriber has an authorisation code, which is used when sending or receiving a message.