![]() ![]() Note also that earbud/mic gadgets with remote-control buttons use the microphone connection to temporarily insert different resistors into the mic circuit. If you connect an electret microphone capsule between the sleeve and the 2nd ring, then the phone should recognize it. That indicates to the phone that earbuds (or headphones, or interface cable of some sort) has been connected. Note that if you insert a traditional TRS plug into the jack, the sleeve will "short out" the 2nd ring position. ![]() There is still practically infinite impedance between the 2nd ring and the sleeve. Plugging in a "raw" connector is no different than nothing plugged in at all. ![]() The phone senses the impedance between the 2nd ring and the sleeve. ![]()
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