push-to-talk circuit

push-to-talk circuit

[′pu̇sh tə ′tȯlk ‚sər·kət] (electricity) Simplex circuit in which changeover from the receive to transmit state is accomplished by depressing a single spring-return switch, and releasing the switch returns the circuit to the receive state; the push-to-talk switch is located on microphones and telephone handsets; it is most often applied to radio circuits.