Also don't forget about limit of network connections in win XP in the same time. By default it 10, but can increase to 100. If you want to test audio data transmitting through the network with many accounts on Windows then use a Windows Server OS (i recommend Win2008 Server - there is a retail version you can use during 240 days free). Offtop: can be possible to use in pjlib sockets platform an IO Competition Sockets of the Windows Servers? it's very powerfull technology from MS :) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090521/2ac4247a/attachment.html>