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Computer-controlled cordless telephone

  • US 4,731,814 A
  • Filed: 02/21/1986
  • Issued: 03/15/1988
  • Est. Priority Date: 02/21/1986
  • Status: Expired due to Term
First Claim
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1. A cordless telephone comprising:

  • a base unit for connection to a telephone line, the base unit including a first transmitter and a first receiver for respectively transmitting signals to and receiving signals from a handset unit associated with the base unit;

    a handset unit with a second transmitter and a second receiver for respectively transmitting the signals to the first receiver and receiving the signals from the first transmitter in the base unit;

    control means for deactivating the second transmitter and reducing the on-time state of the second receiver while the handset unit is located remote from the base unit and in a standby state wherein no user initiated communications exists between the base unit and the handset unit; and

    coding means for storing in the base unit and the handset unit of the cordless telephone and for providing a common security code for establishing communications between the base unit and the handset unit, the coding means being transmitted as signals between the base unit and the handset unit in response to the presence of user initiated communications while the handset unit is located remote from the base unit, the handset unit being unresponsive to user initiated communication attempts by the base unit unaccompanied by the coding means and remaining in the reduced on-time state, and the base unit being unresponsive to user initiated communication attempts from the handset unit accompanied by the coding means.

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