I don't know it exactly, but I think one of those for Siemens M50 mobile headsets will work. if not you could use the connector of this headset to build a adapter. here [1] is the wiring schematic.regards nice1 http://test.opensimpad.org/index.php/Hardw...erial_Connector[div align=\"right\"][a href=\"index.php?act=findpost&pid=130890\"][{POST_SNAPBACK}][/a][/div]