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Low speed gate circuit

  • US 4,706,241 A
  • Filed: 12/30/1985
  • Issued: 11/10/1987
  • Est. Priority Date: 03/12/1985
  • Status: Expired due to Fees
First Claim
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1. In a telephone system which includes one or more ports located on a subscriber'"'"'s premises for connecting equipment on said premises to a specified vendor or services located at a location remote from said premises, said telephone system including means for generating a time multiplexed input serial data stream comprising a plurality of digital words in a serial format, each said digital word representing a data word input on a specific port, said port being specificed by the position of said digital word in said input serial data stream relative to a synchronization signal present in said telephone system and said telephone system further including means for receiving a time multiplexed output serial data stream comprising a plurality of digital words in serial format, each said data word representing a data word to be sent to a specified port, said port being determined by position of said digital word in said output serial data stream relative to said synchronization signal, a gate circuit comprising:

  • means for coupling said gate circuit to said generating means;

    means for coupling said gate circuit to said receiver means;

    vendor coupling means for coupling said gate circuit to each of said vendors, said vendor coupling means coupling each said vendor to said gate circuit by a telephone circuit, means for sending output data packets to each said vendor including means for generating signals representing said output data packets on the said telephone circuit coupling said vendor to said gate circuit, each said output data packet including one or more data words from a specified port and information specifying said port, and means for receiving input data packets from each said vendor including means for receiving signals representing said input data packets on the said telephone circuit coupling said vendor to said gate circuit, each said input data packet including one or more data words to be sent to a specified port and information specifying said port;

    serial input interface means connected to said input serial data stream coupling means for determining the vendor to which each digital word in said input serial data stream is to be sent and for coupling the data word specified by each said digital word and information specifying the port in which said digital word originated to said vendor coupling means; and

    serial output interface means connected to said output serial data stream coupling means and said vendor coupling means for placing a data word received from a vendor which is to be sent to a specified port into said output serial data stream at a location relative to said synchronization pulse which will cause said data word to be sent to the port specified in the input data packet in which it was received from said vendor.

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