dtmfdial(1) on Linux
The text 2a698056671c, as Debian 3.1 (Sarge), Debian 3.0 (Woody) 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