Push-button phone Synonyms

Push-button replaced

PP is an abbreviation for Push-button Phone

What does PP stand for?

PP stands for "Push-button Phone"

(verb) to make a telephone call to
(noun) electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear
(noun) electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds