If your demo is in the morning it's a little late don't you think to say you don't understand.
Did you google for an E-Book or anything on networks, it should be out there.
I believe you posted something like this a while back and I commented that you need to learn what a telephone network is and how it works.
I gave away all my books when I stopped working on 'PBX' systems. The system I worked on did not even have something as powerfull as a pic, it used a Rom State Machine (look that up), and it would handle 100 inside lines, 6 outside lines, and an operator.
You need to know how to go off-hook and still transfer audio (your dtmf tones), process them and then go on-hook. (actually I think X-10 makes this stuff). You need to understand the network and the rest is fairly simple.
Good Luck

What did you make your doc file with?? I tried to open it with OpenOffice and all I got was some drawings with no labels.

 

Thanks yea it is a little too late...I have books that i downloaded and read them through at the early stages not paying particular attentiopn to it too much but its coming back to haunt me slightly now but i think i could manage fairly well because i could explain my circuits used fairly well.

Sorry bout the circuits without titles though. I don;t know what happened there. I used microsoft visio to draw and label them and transfered them to a word file.

 

Do they open correctly in Word?? OpenOffice usually does a good job with Word files. It would be interesting to look at what is there to understand what you built.