Hi Seema, There is opensource library written in c called PjSIP<http://www.pjsip.org/>. It can work on different platforms including Windows Mobile. There is a list of proxies listed on website http://www.voip-info.org/wiki/view/Open+Source+VOIP+Software chose the one which suits you best. On Sat, Oct 24, 2009 at 3:29 AM, hyd1_shikha <hyd1_shikha at sancharnet.in>wrote: > Dear Sir, > > Could you suggest reliable Open source SIP client which works on Windows > mobile 5 or 6. > > Please also suggest a reliable Open Source SIP Server (OS preferably > Windows 2003 upwards) > > We need to write a customize SIP client applciation for Windows mobile 5/6. > > Please suggest. > > Kindly also send us some sites which would help us in this regards. > > Thanks > Seema > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20091024/47ac8920/attachment.html>