Call by intercom is a communication system that allows people to communicate with each other without having to be in the same physical location. It involves using an intercom, which is a device that transmits sound from one location to another. The term 'call by intercom' is often used to refer to a situation where someone calls another person through an intercom system. This type of communication is often used in businesses, schools, and other organizations where people need to communicate quickly and easily. The crossword solution for the term 'call by intercom' is PAGE, which is an acronym for Push-to-Talk Audio Gateway Exchange. This is a type of intercom system that allows users to communicate with each other by pressing a button on the intercom.