vboxbeep(1) on Linux
The text 9e8453975a72, as Debian 10 (Buster), Debian 9 (Stretch) shipped it. The page shows this text now.
isdn voice box (beeper)
Flags it lists
-
--help -
--kill -
--messagebox -
--pause -
--sound -
--version -
-h -
-k -
-m -
-p -
-s -
-v