DTMF and PIC 16F628A

[ultramegaok]

You'll be wanting to run your pic at 20MHz to stand a chance of your phone system
recognizing the DTMF tones produced by PicBasic/Pro.
Don't forget to DEFINE OSC 20
The tones produced by the pic aren't a very pure sine wave.

An external DTMF generator chip would be best,
but I have used a 16F84 to dial numbers and navigate DTMF phone menu systems.
One project was an automated thing to retrieve my bank balance over the phone on payday.

Thanks Art for the Tip
I will try at 20MHz.....by the way , I like your website......