CON014PA AHJ to OMTP connector and vice
versa
CON014PA – this is a 4-pin to 4-pin connector which switches round the wiring of the
microphone pins on the Conversor Adapter cable to make it compatible with OMTP
or CTIA configurations and enable microphones with a stereo plug to be connected
to an Android phone with an OMTP socket.
Instructions for use
The 4-pin connector can also be used on its own to connect a set of Apple headsets
to an Android device or vice versa.
There are different types of headsets and they are not compatible with each other.
The most common issue that causes compatibility issues is the number of conductor
points on the headset and what they are connected to, but the signalling
arrangement (i.e. the way remote controls work) is also important.
Modern smartphones typically use headsets with four conductor points (the "bands"
that you can see on a connector). In almost all cases two points are used for audio
out (stereo), one for the microphone, and one for signalling (e.g. to end a call).
However, these points are not always used in the same way, or in the same order.
There are two common arrangement for a four conductor point headset. The first,
known as American Headset Jack (AHJ) standard, has the microphone connector
point on the sleeve end, with the signalling (or ground) connector on the second ring.
This arrangement is used by HTC devices, and some recent devices from Sony and
Nokia. Apple uses a similar connector arrangement, but uses a non-standard
microphone and control signalling method.
The second common arrangement is the longer established and more formalised
OMTP standard. It has the signalling connector (ground) next to the sleeve, with the
microphone connector on the second ring. This is the reverses of the AHJ
arrangement. It is used by the majority of mobile phones currently being sold, most
Samsung smartphones, and older Sony Ericsson and Nokia smartphones.
Plugging an OMTP headset into an AHJ jack, and vice versa, will result in the audio-
