beeper

noun

1. Something that makes a beeping sound.

   “The Controls option enables you to resize and move a currently displayed window, as well as toggle the PC beeper.”

2. Something that makes a beeping sound.

   “No stages, front pages, no phones, no beepers”

3. (endearing)Something that makes a beeping sound.
4. (informal)A broadcast interview taking place over the telephone (originally having to include a beeping sound to indicate that it was not a live broadcast).

   “Radio "beepers" are easy: all you need is a telephone, and you can basically have an overseas conversation with any DJ or radio news director in America.”