Reviewing your questions, I'm not that confident anymore, that my initial statement was right. While answering to the initial post, I recalled some posts from the german IPPhone-Forum, I read one or two years ago. Seemed, that most of the technical limitations being in place that time are no longer existent. I tried to doublecheck this, but I couldn't find any clue about any significant technical brake for SIP. Just T&C's against SIP and some technical limitations (bandwidth, prices etc.) I would like to withdraw my statement and park it for further investigations :) Regards > Which kind of methods for the detection are known to be in place? > > I mean, they simply block 5060 udp/tcp port or do they use some kind of > protocol detection systems to catch RTP and SIP protocol even of other > udp/tcp ports? > > Because that's a very interesting item for all the mobile voip > capabilities, and if protocol detection is employed then some kind of > open obfuscation technology could be evaluated for voip traffic. > > Let me know > > Fabio > > Roland Klabunde wrote: > >> This is most likely due to limitations of your mobile provider. Most >> providers do not allow you to use GPRS/EDGE/HSDPA connections together >> with SIP, RTP (because this offends their business models). >> >> Regards >> >> >> Karthik Babu schrieb: >> >> >>> Hello Nanang , >>> >>> I have just noticed that the registration is failing and could not use >>> the app using GPRS (tested on both e61 and n95 ) . >>> >>> >>> Can you please advise ? >>> >>> >>> >>> >>> >>> >>> -- >>> Karthik >>> ------------------------------------------------------------------------ >>> >>> _______________________________________________ >>> 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 >> >> > > > _______________________________________________ > 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 >
