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Multichannel telephone system

  • US 4,672,657 A
  • Filed: 12/17/1985
  • Issued: 06/09/1987
  • Est. Priority Date: 12/17/1985
  • Status: Expired due to Fees
First Claim
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1. In a multi-channel telephone system having:

  • (A) a plurality of telephones, each of said telephones having a transceiver unit;

    (B) a plurality of user channels; and

    (C) a key service unit having a plurality of user channel transceivers for interfacing between said plurality of telephones and a primary communications link via said user channels;

    an improvement comprising;

    (A) channel monitor means for frequently monitoring said plurality of user channels for energy, for determining availability of said user channels based upon such monitoring, and for providing an output related to the availabilty of said user channels; and

    (B) channel status list means for receiving said output from said channel monitor means and for maintaining a list relating to availabilty of said user channels.

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