Hi, i set udp_cfg.port = 0; rtp_cfg.port = 0; i run pjsua to send , it is OK but i can't receive it correctlly. when i set udp_cfg.port = 5060; rtp_cfg.port = 4000; it received OK.but can't run two pjsuato send in one pc. Can you help me? thanks. -- Zhang Zhilong -- Zhang Zhilong -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090813/efafeb7d/attachment.html>