Telephone Keypad

Telephone keypads are a type of input device used on telephones and telegraph equipment. They are part of the supply class Telephone And Telegraph Equipment, which falls under the supply group Communication, Detection, And Coherent Radiation Equipment.

Telephone keypads typically consist of a grid of buttons, numbered from 0 to 9, along with additional buttons for special functions such as * and #. Each button is associated with a specific digit or character, allowing users to input numbers, letters, or symbols during phone calls or telegraph communication.

These keypads are essential for dialing phone numbers, entering PIN codes, accessing voicemail, and performing various other functions on telecommunication devices. They provide a convenient and efficient way for users to input information during phone conversations or telegraph transmissions.

Overall, telephone keypads play a crucial role in facilitating communication and are widely used in various telecommunication devices and systems.