The Care and Feeding of ISDN4BSD
12.5 Available Scripts	12 Setting up the	12.7 300 Baud Soft-Modem

12.6 DTMF Decoding

As of version 0.71 there is a program available (contributed by Poul-Henning Kamp) which will decode DTMF tones in an audio data stream called dtmfdecode(8).