I also encounter this problem, have you found the root cause about it? Thanks. 2014-01-07 12:10 GMT+08:00 qiulang <qiulang at sinicnet.com.cn>: > Hi, > > I tried pjsip 2.1 and even latest 2.2 trunk but I still see from time to > time that on_incoming_call did not get called when my iOS app runs in > background (surely I have set it as a voip app), especially using 3G. So in > this case only when the app enters the foreground on_incoming_call was > called but the calling party had already hang up. After further debugging > the issue I found sometimes the tcp port seems to be blocked entirely as my > server keeping resending the invite message. > > So any idea how to fix that ? > > > _______________________________________________ > 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/20140429/d3f15b11/attachment.html>