Cellular headset pinout

Started by Steve, Feb 26, 2005, 05:33

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I can't believe I couldn't find this on the site... but I am looking for the pinout for a standard cellular headset... the standard I am talking about has a 2.5 mm 3 conductor plug that handles microphone, mono speaker, I assume some sort of ground, and some way of telling the phone to answer or hang up (probably interrupts the ground or something for that... I don't know)