PIC Microcontoller Input / Output Methods

for DTMF

http://RAT_RING.piclist.com All sorts of good PIC Phone interface stuff. Even generating V23 modem signals directly. Caller ID decode. etc...Also at http://www.geocities.com/kenboak/rat_ring.html

Dave Thomas's DTMF Encoder

Regulus Berdin's DTMF Encoder

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