Hello ultramegaok,

Start by going to http://www.epanorama.net/circuits/te....html#audioint. This will be your wealth of knowledge on telephone line interfaces. I can guarantee that your circuit will NOT work. You have to be extremely careful on what you put on the telephone network. I only glanced through this site but I saw a very basic interface circuit that you should be able to construct without too much difficultly.

You can find several PBP telephone line programs at www.melabs.com. Look under sample programs and you will find a program that lets your PIC dial in pulse and DTMF.

I am going away for a few days so I'll check back in Tuesday night. Start reading and have some fun!!

HTH,

BobK