HI! i'm a computer Engineering student i want to learn about how telephone works but i can't understand will without demonstration or any photos seen, i really need help please can you send me step by step direction on how to make a auto-dial/push-to-dial pay phone
and i only know a little on microC PIC compiler, how i wish i could learn more and finish our project safely. Any help will do.Thankz

 

Welcome to the forums.

Your questions are now in their own thread as the one you hijacked is quite old - http://forum.allaboutcircuits.com/showthread.php?t=1333

There is a great deal of information involved in your question. May we suppose that you have some understanding of telephony? - http://en.wikipedia.org/wiki/Telephony

How are you planning to implement your project?

step by step direction on how to make a auto-dial/push-to-dial pay phone

Does this request mean that you plan to actually construct the instruments from raw materials?

As to some parts, they are easy to find, plus the principle behind them, such as the keypad and DTMF signaling (involved in "push-to-dial" operation).

As a further aid, can you say more about the nature of "our project"?