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Data transmission process in a CATV system

  • US 4,361,903 A
  • Filed: 07/30/1980
  • Issued: 11/30/1982
  • Est. Priority Date: 08/16/1979
  • Status: Expired due to Term
First Claim
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1. The method of interrogating terminal devices by a head end in a cable television system comprising the steps of:

  • addressably interrogating a set of addressable terminal devices at each of a plurality of addressable data transmitting and processing devices, each addressable terminal device being coupled to an associated data transmitting and processing device by a conductor, receiving a plurality of selectable television signals over the conductor, receiving interrogation signals over the conductor, and transmitting terminal information over the conductor in response to an interrogation signal containing an address of said addressable terminal device,receiving and storing at each addressable data transmitting and processing device, terminal data transmitted by each addressable terminal device coupled thereto over the conductor device in response to an interrogation;

    addressably interrogating each addressable data transmitting and processing device at a head end, each addressable data transmitting and processing device being coupled to the head end by a conductor and transmitting over the conductor in response to a single addressable interrogation containing a respective address thereof stored terminal data for each addressable terminal device associated therewith.

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