vboxbeep(1) on Linux
The text fd46bcddbfa9, as Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
isdn voice box (beeper)
Flags it lists
-
--help -
--kill -
--messagebox -
--pause -
--sound -
--version -
-h -
-k -
-m -
-p -
-s -
-v