A remotely activated control device responsive to a specific transmitter operating
in a frequency band assigned to radio telephone equipment, such as cellular telephone
networks, cordless telephones, etc. The control device includes a radio receiver
which provides a received pulse train to an assurance logic circuit. The assurance
logic circuit determines if the received pulse train is limited to no more than
a transmitter identification code and an action code, the combination of which
is less than the code required to activate a relay network or initiate a radio
telephone connection. Pulse trains accepted by the assurance logic circuit are
compared to a stored code by a comparitor. The stored code includes the identification
of a specific transmitter or group of transmitters and at least one action code.
If the received pulse train matches the stored code, a switching circuit is activated
to control a user supplied device.
