headset electrical spec - Esato archive

Posted by punit_p
I am working on a hands-free application and would like to use a different microphone than the one provided with the Bluetooh HBH-20. Would anyone know where I can find the electrical spec. of the headset that plugs into the jack on the bluetooh adapter so i can determine whether or not the microphone i will use is suitable.

thanks.

punit