hi i am working on PJSUA_wince project. I am tring to implement call operation on both windows mobile, standard and professional. when i click on call its give some response like request time out and in debug window its shows message "SIP registration failed, status=408 (Request Timeout)". let me know about this error why its comming. if u have some information regarding this error please........provide solution. Tim -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20101201/ee2b24f9/attachment.html>