Information network access apparatus and methods for communicating information packets via telephone lines

DC CAFC
  • US 6,327,264 B1
  • Filed: 02/18/1999
  • Issued: 12/04/2001
  • Est. Priority Date: 05/01/1996
  • Status: Expired due to Term
First Claim
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1. A method of communicating information packets to and from a CSMA/CD (Carrier Sense Multiple Access with Collision Detection) path via a bidirectional communications path, comprising the steps of:

  • coupling a first end of the communications path to the CSMA/CD path via a first modem having a CSMA/CD interface coupled to the CSMA/CD path;

    communicating said information packets between the CMSA/CD path and the first modem via said CSMA/CD interface, coupling a second end of the communications path to a second modem;

    communicating said information packets between the first and second modem via the communications path using half duplex communications controlled by the first modem;

    communicating control information for controlling said half duplex communications via the communications path from the first modem to the second modem; and

    wherein the communications path comprises a two-wire telephone subscriber line and wherein the modems communicate said information packets via the line at frequencies greater than telephone signal frequencies, the method further comprising the steps of;

    communicating telephone signals via the line; and

    at each end of the line, combining telephone signals and information packets to be communicated via the line, and separating telephone signals and information packets communicated via the line, using a diplexer.

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