Patent ID: 6091329
Filing Date: 2000-07-18
Classification: G08B,H04B

Abstract:
A monitor system, comprising:a first transceiver having a first transducer to detect and convert sound waves in the vicinity thereof to a transmitted RF signal representative thereof and a second transducer with a first portion to detect and convert a received RF signal into an audio signal and a second portion to convert the audio signal to sound waves in the vicinity thereof, the first and second transducers operating one at a time, with the one operating being selectable; anda second transceiver having a first transducer to detect and convert sound waves in the vicinity thereof to a transmitted RF signal representative thereof, the transmitted RF signal also including a predetermined code inserted therein, and a second transducer to detect and convert a received RF signal into sound waves in the vicinity thereof, the first and second transducers operating one at a time, with the one operating being selectable;wherein the first transceiver primarily and automatically has the first transducer selected and the second transceiver primarily and automatically has the second transducer selected, to provide communication from the first transceiver to the second transceiver, and wherein the second transceiver can select the first transducer of the second transceiver when actuated by an operator thereof, and further wherein the first transceiver automatically and periodically disables the first transducer of the first transceiver and enables the first portion of the second transducer for a predetermined time duration during each period to analyze whether an RF signal is being received and whether the received RF signal includes the predetermined code and, if the predetermined code is included, maintaining the selection of the second transducer to provide communication from the second transmitter to the first transmitter.