maybe you can also use 8870 but i forget the manufacture you can find it in
www.questlink.com
just search for 8870, it is a DTMF decoder so you can control your
microcontroler using DTMF signal from telephone

> -----Original Message-----
> From: Wagner Lipnharski [SMTP:wagner@USTR.NET]
> Sent: Monday, January 24, 2000 9:09 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [OT] Remote Control by Telephone [was: pic based
> electronicsforhouse]
>
> Another suggestion is the CD22202 and CD22204, both from Harris, both
> use an external crystal of 3.579545 MHz (TV Color Burst), they supply
> the decoded DTMF digit over 4 bits plus a "Data Valid" pin.  We used one
> of them once, no problems at all.
>
> Wagner