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</o:shapelayout></xml><![endif]--></head><body lang=EN-MY link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi All,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> I use Opensips 1.9.1 and have enabled RTP and Nating in the configuration, Whenever I use to connect the calls using my 3G connection, call gets connected but my voice is not being heard, whereas though wifi everything is working fine. I tried connecting with Linphone I didn’t face any issue, where as whenever I try connecting using my app which on top of CSip I am getting this issue. This issue is not getting replicated over wifi, I am getting this issue only on 3G. My carrier is not blocking any packets from my side as different opensource client is letting me make calls over the SIP.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> Some blogs stated that configuring Stun will solve this issue, I tried doing it but no luck. In some other blog they where stating I can go with TURN Server, I need to know whether Turn servers solve these issues and someone can put me over the installation and using guide for the same.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Can someone please direct me on the right track please?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-Thanks<o:p></o:p></p><p class=MsoNormal>Rajesh<o:p></o:p></p></div></body></html>