>Looking for a schematic to be able to connect a telephone set to and be
able to have line in >and line outs from the telephone.

>Basically I should be able to connect the telephone to my stereo and use it
as a speaker and >a mic! (all at line level ins and outs)

No not exactly. The telephone is full duplex, and will require about 10 to
20 Vdc to function correctly. You may however provide taps internally to use
the mic and a low level amp to drive the speaker. Separation is a must, your
stereo is not full duplex through the same wires. You may be able to make a
transformer circuit that will provide DC for the phone and isolate the
stereo from the DC. Impedance matching will be important, 600 ohms for the
telephone and LOW impedance for the stereo, I am not sure of the correct
impedance for the stereo. Again you can not run full duplex audio to the
stereo, major feedback problems.

Gordon Varney

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu