Hi all,
I am interesting on making an intecom system, using normal telephone methods with telephones, including tone dialing. Has anyone got any ideas, or sources for info? I would like info on powering the line, dtmf dialing, directing of calls (recognizing the dtmf), etc. Practically, I want to make a PBX kind of thing. Also, I want to know how to make a telephone which can go on your head, like headphones... any ideas for that will also be greatly appreciated.
Thanks, Clyd3