Before the advent of push-button phones, rotary phones were the primary means of making phone calls. Rotary phones have a dial with ten finger holes, each corresponding to a number from 0 to 9. To dial a number, the user inserts their finger into the corresponding hole and rotates the dial clockwise until it stops. The dial then returns to its starting position, generating a series of electrical pulses that are sent to the telephone exchange. The exchange then connects the caller to the desired number.
Rotary phones were first introduced in the late 19th century and remained popular until the 1970s. They were eventually replaced by push-button phones, which are easier to use and more efficient. However, rotary phones are still used in some parts of the world, and they are often seen as a nostalgic reminder of a bygone era.
