How does a payphone work?

A payphone works by allowing users to make phone calls after inserting money, typically in the form of coins, credit cards, or phone cards. When the user lifts the handset, the payphone connects to the phone network and prompts for payment. Once the required amount is inserted, the phone line is activated, allowing the caller to dial a number. The payphone then deducts the cost of the call based on the duration and distance, and it may return any unused change after the call ends.