Question

A device that is part of an analog telephone, by design, breaks the circuit several times a second, and in increments between 1 and 10, depending on how the user uses this device.

What function does that device perform?

A. call forwarding
B. call termination or hanging up the telephone
C. payload generation of voice information
D. signaling the CO for circuit to be switched

Answer 1

OptioThe dialing device breaks the circuit to generate a series of pulses interpreting the dialed number, signaling the central office to route the call.

Step-by-step explanation:

The device referred to in the question is an integral part of an analog telephone system and performs the function of signaling the central office (CO) for the circuit to be switched. This device is commonly known as a rotary dial. When a user rotates the dial to a number, the circuit is broken several times corresponding to that specific number. For instance, dialing the number 5 would break the circuit five times. This is specific to analog telephony, whereas modern cell phones digitize voice and data for transmission.

The series of pulses generated by these interruptions are then sent to the telephone exchange, which interprets them to route the call to the desired telephone number. While this mechanism is a part of analog telephony, modern telecommunication has largely transitioned to digital systems where cell phones use radio signals and frequencies to connect calls, and data is transmitted in binary form as ones and zeros, improving the clarity and range of communication.