Hello, With the new iOS 9 AppStore submission policy stating that all iOS 9 app submissions will be required to have IPV4 & IPV6 support, I gave my current application a try using Apple's IPV6 nat64 tool they announced at WWDC 2015. Unfortunately when attempting to place a call in this network environment, I am getting assertion failures like this: "*Assertion failed: (af==PJ_AF_INET || af==PJ_AF_INET6), function pj_sockaddr_set_port, file ../src/pj/sock_common.c, line 430."* I am currently running PJSIP v2.2.1. If anyone has an idea or lead to help me resolve this issue, I would greatly appreciate it! If you need anymore information, I will be able to provide that with no issues. P.S sorry for anything noobish I say. I have picked up this project from someone else, and still in the process of figuring everything out with PJSIP. Thanks, Tyler -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20150729/a6bd5593/attachment.html>