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Portable telephone system having selectable bypass line

  • US 5,295,179 A
  • Filed: 04/20/1992
  • Issued: 03/15/1994
  • Est. Priority Date: 04/18/1991
  • Status: Expired due to Fees
First Claim
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1. A portable telephone system comprising:

  • a first telephone network including a terminal station;

    a first telephone set connected to the first telephone network via the terminal station;

    a second telephone network including a communication center which is connected to the first telephone network at a connection point; and

    at least one second telephone set registered in the communication center and connected to the first telephone network via the terminal station, said second telephone set being a portable telephone set comprising a base station part and a portable station;

    said communication center comprising first means for sending a line hold signal to the first telephone set via the first telephone network when a call to the portable station of the second telephone set is received via the first telephone network, and second means for sending control information to the base station part of the second telephone set, said control information including a notification that a call is being placed to the portable station of the second telephone set by the first telephone set and a telephone number of the first telephone set,said base station part of the second telephone set comprising third means for dialing the telephone number of the first telephone set in response to the control information received from the communication center, so that a service connection, after the third means dials the telephone number of the first telephone set, is made between the first and second telephone sets via the terminal station of the first telephone network.

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