Florida State Paramedic Practice Exam

In a duplex system, how does communication occur?

1. Using one frequency at a time

2. Simultaneous transmission and reception

3. Sequential signals for each communication

4. Combines voice and telemetry on a single frequency

The correct answer is: Simultaneous transmission and reception

In a duplex system, communication is characterized by the capability for simultaneous transmission and reception of signals. This essentially means that both parties can communicate with each other at the same time without waiting for one to finish before the other can respond. Duplex systems are commonly used in telephony and radio communications, providing a seamless and efficient means of interaction. This method is crucial in emergency medical services and other critical applications where timely communication can impact response outcomes. By allowing both the sender and receiver to speak and listen at the same time, duplex systems ensure that information can be exchanged more fluidly, reducing the time needed for each party to convey their messages. In comparison, other options describe communication methods that do not facilitate this type of interaction. For instance, using one frequency at a time or sequential signals would require participants to take turns, leading to delays. Combining voice and telemetry on a single frequency can introduce complexities and may not typically reflect the standard operation of a duplex communication system. Thus, simultaneous transmission and reception is the defining feature that confirms the correct choice.