Difference between revisions from 2013/03/24 18:04 and 2013/03/24 18:01.[http://remoteqth.com/img/wiki-spa301-1.jpg]
* remove the pcb board from ip phone
[http://remoteqth.com/img/wiki-spa301-2.jpg]
* decompose head hang up switch, and insulation
[http://remoteqth.com/img/wiki-spa301-3.png]
* apply circuit by [OK2ZAW|http://ok2zaw.blogspot.cz/] - any P-chanel Mosfet (IRLML6402PBF) and NPN transistors (2N2222A)
[http://remoteqth.com/img/wiki-spa301-4.jpg]
* now IP phone hang UP automaticaly after call.picks up the call automaticaly.
* 4p4c [Handset|http://en.wikipedia.org/wiki/Modular_connector#Handset_wiring]{{
-------
| ---| tp389 mic +2V
| ---| tp390 sp
| ---| tp391 sp
| ---| tp392 mic GND
-------
}}