>I've already built something using a Mitel 8870 to recognize DTMF tones,
>and I used an ISD1020 in another project to make my PIC talk over a phone

>
>My question is: is there something ready-to-wear to perform the four
>functions that I need, or do I have to toy with half a dozen of different
>circuits (one to dial, one for the DTMF tones

I beleive that there is a companion chip to the 8870 that has DTMF output
as well as input.  Also check digikey.com for other voice record chips of
longer record time.

chas  K4YC