Headphone w/ Microphone Circuit

[charles at embsyspro.com]

Hi,
I need to know the basic circuit and connector requirements for a stereo
audio headset jack with a microphone similar to the kind used with cell
phones. Can someone tell me where to look?  I would not have asked such a
simple question, but I have looked a AMP's web site and have had trouble
determining the right component.

CLN

-------------- next part --------------
A non-text attachment was scrubbed...
Name: winmail.dat
Type: application/ms-tnef
Size: 1572 bytes
Desc: not available
URL: <http://lists.rtems.org/pipermail/users/attachments/20010901/d113e24d/attachment.bin>