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4 pin 3.5mm (2.5mm) plug connector layout
4 pin 3.5mm (2.5mm) plug connector
at the headset cable (2.5mm jack used)
Wiring for the nokia 2.5mm 4-pole headset socket of Nokia 1100, 1101, 1110, 1600, 2100, 2300, 2500, 2650, 2652, 3120c, 3210, 3310, 3330, 3410, 3510, 3510i, 3650, 3660, 5210, 6030, 6060, 6120, 6510, 6600, 7280, 7380 7650, 8210, 8310, 8800, 8850, 8890, 8910, 8910i cell phones (except some smartphones)
The pinout should fit 33 devices/models. Click to list>

Pin		 Name Direction Description
1 Tip Speaker +
2 Ring 1 Microphone +
3 Ring 2 Speaker -
4 Sleeve Microphone -
 The answer/end button should be connected across the microphone connections. Microphone impedance should be 1k4. Speaker is 30 Ohm.


 

Nokia 3210 handsfree / headset schematic

Nokia headset schematic

Nokia 8210 handsfree / headset schematic

Nokia handsfree schematic

Both schematics made by Goran Jurkovic


 
Pinout status: +20 -2
According to 22 reports in our database (20 positive and 2 negative) the Nokia headset / handsfree HDB-5 connector and schematics pinout should be correct.

Is this pinout
NO DIY devices
Nokia headset / handsfree HDB-5 connector and schematics visual pinout:click to enlarge
Source(s) of this and additional information: discuss.treocentral.com, http://free-zg.htnet.hr/GoranJurkovic/nokia/ , http://wiki.openmoko.org/wiki/Analog_wired_Headset_Nokia
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