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Single line telephone communication system

  • US 4,821,319 A
  • Filed: 05/05/1987
  • Issued: 04/11/1989
  • Est. Priority Date: 04/25/1985
  • Status: Expired due to Fees
First Claim
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1. A communication system for use with a single pair of wires, said single pair of wires having an externally connected segment and an in-house segment, said in-house segment having a plurality of subsets interconnected therewith;

  • said system comprising;

    means for selectively providing connection between said externally connected segment and said in-house segment;

    means, interconnected between each said subset and said in-house segment, for establishing direct communication between said subsets, said subset communication means including a plurality of station adapter modules, each said station adapter module being connected between one of said subsets and said in-house segment; and

    means, associated with each said station adapter module, for identifying said subset associated therewith, each said station adapter module also including means for enabling a call announcer in response to a signal from said subset identifying means, and means for introducing a time-delay before said call announcer is enabled, said delay being at least as long as the time required for all identifiers to be received by said subset identifying means.

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