Patent No: US 6,937,856: Method for push-to-listen remote monitoring
A method of operating a wireless communication system including initiating a call from a first communications unit to a second communications unit, embedding a push-to-listen control protocol configuration in a data packet responsive to the call initiation, transmitting the data packet from the first communications unit to the second communications unit, configuring the second communications unit based on the push-to-listen control protocol configuration and transmitting an automatic reconnect from the second communications unit to the first communications unit responsive to configuration of the second communications unit
Check Out Patent