Pin layout of 2.5 mm audio jack of handsets

The pin layout for connecting cable headsets to a handset with a 2.5 mm audio jack can be found in this article.


Tip = Mic

middle segment = SPK

3rd segment (cable side) = GND





Was this article helpful?

That’s Great!

Thank you for your feedback

Sorry! We couldn't be helpful

Thank you for your feedback

Let us know how can we improve this article!

Select at least one of the reasons
CAPTCHA verification is required.

Feedback sent

We appreciate your effort and will try to fix the article