Digital added main line system

  • US 5,473,613 A
  • Filed: 01/27/1995
  • Issued: 12/05/1995
  • Est. Priority Date: 07/25/1989
  • Status: Expired due to Fees
First Claim
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1. Apparatus for concurrent transmission and reception of multiple telephone signals between a telephone company location and a subscriber location over a single twisted pair, said apparatus comprising:

  • a) at a telephone company location, master equipment comprising;

    i) master conversion means coupled to telephone company equipment, for converting a plurality of incoming telephone company analog signals from said telephone company equipment into an outgoing telephone company higher-rate multiplexed binary signal, and for converting an incoming telephone company higher-rate multiplexed binary signal into a plurality of outgoing telephone company analog signals for use in said telephone company equipment; and

    ii) master line-coding means coupled to said master conversion means and to said signal twisted pair, for converting said outgoing telephone company higher-rate multiplexed binary signal into an outgoing line-coded digital signal and transmitting said outgoing line-coded digital signal over said single twisted pair to a subscriber location, and for receiving an incoming line-coded digital signal from said subscriber location and converting said incoming line-coded digital signal into said incoming telephone company higher-rate multiplexed binary signal; and

    b) at said subscriber location, a remote terminal comprising;

    i) remote line-coding means coupled to said single twisted pair, for receiving said outgoing line-coded digital signal and converting said outgoing line-coded digital signal into an outgoing subscriber higher-rate multiplexed binary signal, and for converting an incoming subscriber higher-rate multiplexed binary signal into said incoming line-coded digital signal and transmitting said incoming line-coded digital signal over said single twisted pair;

    ii) remote conversion means coupled to said remote line-coding means and to subscriber equipment, for converting said outgoing subscriber higher-rate multiplexed binary signal into a plurality of outgoing subscriber analog signals for use in said subscriber equipment, and for converting a plurality of incoming subscriber analog signals from said subscriber equipment into said incoming subscriber higher-rate multiplexed binary signal; and

    wherein each of said plurality of incoming telephone company analog signals, each of said plurality of outgoing telephone company analog signals, each of said plurality of outgoing subscriber analog signals, and each of said plurality of incoming subscriber analog signals is a full-duplex two-wire analog signal; and

    wherein said incoming line-coded digital signal and said outgoing line-coded digital signal are signals selected from the group of 2B1Q and 4B3T signals.

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