dtmfdial(1) on Linux
The text f9648c7a2da7, as Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
DTMF tone generator
Flags it lists
-
--bits -
--bufsize -
--left -
--output-dev -
--right -
--silent-time -
--sleep-time -
--speed -
--table-size -
--tone-time -
--use-audio -
--volume