Telecommunications system with value added service directory and an integrated circuit module therefor

  • US 6,011,976 A
  • Filed: 04/19/1996
  • Issued: 01/04/2000
  • Est. Priority Date: 06/15/1993
  • Status: Expired due to Term
First Claim
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1. A telecommunications system comprising at least one host station and a plurality of subscriber units, said host station being operable to transmit messages to at least one of said subscriber units, and each said subscriber unit having a multiplicity of memory locations adapted to be accessible from said subscriber unit, means responsive to the detection of a first message to store said first message in one of said memory locations, access means enabling said memory locations to be selectively accessed from said subscriber unit when required, and means responsive to an instruction transmitted from said host station selectively to enable or prohibit accessing of said memory locations from at least one of said host station and said subscriber unit, at least one of said subscriber units comprising a transceiver and an integrated circuit module having said memory locations, and means responsive to the detection of said first message by the transceiver to route said first message to said one of said memory locations, said module being removably connected to said transceiver and including means responsive to the entry of a simple short code to read said first message from the respective memory location, means responsive to a request transmitted from said host station for information stored in a selected one of said memory locations of said module to read and transmit said information to said transceiver, a multiplicity of further memory locations which can be overwritten from the respective subscriber unit, means for selectively enabling or prohibiting said further memory locations to be overwritten or to be read, means responsive to an instruction transmitted from said host station for running a program stored in a said further memory location, and means for recognizing a specific format in which said first message, request for information and instruction are transmitted.

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