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Communication system utilizing information received during a silent interval between ringing signals

  • US 5,396,548 A
  • Filed: 03/08/1993
  • Issued: 03/07/1995
  • Est. Priority Date: 03/08/1993
  • Status: Expired due to Term
First Claim
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1. A communication system for switchably controlling connections between a plurality of external communication lines and one or more system extension loops which connect to the system;

  • said system comprisingtable means for associating each of said plurality of lines with at least one extension loop of said system,means for detecting information in a silent interval between ringing signals of an incoming call received over a first one of said lines,means for storing said information in a call record established for said call prior to said call being answered,means responsive to a predetermined call condition at said system for sending at least a portion of said stored information as part of an output control signal sent over an extension loop, and whereinsaid system in response to a line identification signal accesses said table means to select at least one extension loop of said one or more extension loops which is to receive said control signal.

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