The push-button telephone, also known as the touch-tone phone, is a device used to make telephone calls by pressing buttons that correspond to numbers on a keypad. There are several synonyms for the push-button telephone, including digital phone, keypad phone, touchpad phone, and electronic phone. These terms describe the same type of phone that was introduced in the 1960s, replacing the older rotary dial phone. The push-button phone quickly became popular due to its ease of use and convenience, allowing people to dial numbers quickly and accurately. Today, with the rise of digital and mobile phones, the push-button telephone remains a relic of a bygone era.