piclist 2001\01\02\111329a >
Thread: telephone line interface
face BY : Dan Michaels email (remove spam text)

pang khong lin wrote:
>I did not managed to find any sites that offer some sort of method (
>schematic ) to put a phone on hook and off hook. I have tried opening up
>several house phones to see how they work, but it is very difficult to trace
>the connection. Anyone has any schematic that shows how to bring the phone
>off hook and on hook or maybe even the schematic
>of a typical phone?

I have some links to telephone circuits/info on my page.
The first 2 links show lots of circuits:


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See also: www.piclist.com/techref/pots/dtmf.htm?key=telephone
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