I have been trying to solve the same problem for quite some time now. and I have yet to find a solution. So if you find one please post it and if I also do I will post it. Cheers, -- Nguni Phakela On Tue, Apr 29, 2014 at 10:53 AM, Tim Zhang <mythfish at gmail.com> wrote: > 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 >> >> > > _______________________________________________ > 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/bf7f0129/attachment.html>