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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello all,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’ve got a problem of one way voice when making a call from a public side to private side, where the callee on private side can’t hear caller from public side. However, if the call is initialled from private side, everything is fine.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Here is my topology. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>EP1 (public IP) <span style='font-family:Wingdings'>à</span> Cisco CUCM (public IP) <span style='font-family:Wingdings'>à</span> OpenSIPs (public IP with rtpproxy) <span style='font-family:Wingdings'>ß</span> Home router (NATed) <span style='font-family:Wingdings'>ß</span> EP2 (private IP).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>After enabled the debug as below, I found when EP1 calls EP2, nathelper request a rtpproxy port but received an “0”.<o:p></o:p></p><p class=MsoNormal>Mar 23 23:44:22 [23719] DBG:nathelper:force_rtp_proxy: Forcing body:<o:p></o:p></p><p class=MsoNormal>[v=0<o:p></o:p></p><p class=MsoNormal>o=xxxxxxxxxxxxx 8000 8000 IN IP4 192.168.1.112<o:p></o:p></p><p class=MsoNormal>s=SIP Call<o:p></o:p></p><p class=MsoNormal>c=IN IP4 192.168.1.112<o:p></o:p></p><p class=MsoNormal>t=0 0<o:p></o:p></p><p class=MsoNormal>m=audio 49866 RTP/AVP 0 8 18 9 101<o:p></o:p></p><p class=MsoNormal>a=sendrecv<o:p></o:p></p><p class=MsoNormal>a=rtpmap:0 PCMU/8000<o:p></o:p></p><p class=MsoNormal>a=ptime:20<o:p></o:p></p><p class=MsoNormal>a=rtpmap:8 PCMA/8000<o:p></o:p></p><p class=MsoNormal>a=rtpmap:18 G729/8000<o:p></o:p></p><p class=MsoNormal>a=fmtp:18 annexb=no<o:p></o:p></p><p class=MsoNormal>a=rtpmap:9 G722/8000<o:p></o:p></p><p class=MsoNormal>a=rtpmap:101 telephone-event/8000<o:p></o:p></p><p class=MsoNormal>a=fmtp:101 0-15<o:p></o:p></p><p class=MsoNormal>m=video 21778 RTP/AVP 99 100 34<o:p></o:p></p><p class=MsoNormal>b=AS:384<o:p></o:p></p><p class=MsoNormal>a=sendrecv<o:p></o:p></p><p class=MsoNormal>a=rtpmap:99 H264/90000<o:p></o:p></p><p class=MsoNormal>a=fmtp:99 profile-level-id=428014; packetization-mode=0; sprop-parameter-sets=Z0KADJWgUH5A,aM4Ecg==<o:p></o:p></p><p class=MsoNormal>a=rtpmap:100 H263-1998/90000<o:p></o:p></p><p class=MsoNormal>a=fmtp:100 CIF=1; QCIF=1<o:p></o:p></p><p class=MsoNormal>a=rtpmap:34 H263/90000<o:p></o:p></p><p class=MsoNormal>a=fmtp:34 CIF=1; QCIF=1]<o:p></o:p></p><p class=MsoNormal>Mar 23 23:44:22 [23719] DBG:core:parse_headers: flags=40<o:p></o:p></p><p class=MsoNormal>Mar 23 23:44:22 [23719] DBG:core:parse_to_param: tag=7d81dea5-6b91-4499-b7a2-77dff783a179-43138246<o:p></o:p></p><p class=MsoNormal>Mar 23 23:44:22 [23719] DBG:core:parse_to: end of header reached, state=29<o:p></o:p></p><p class=MsoNormal>Mar 23 23:44:22 [23719] DBG:core:parse_to: display={"Leon Li"}, ruri={sip:3537@202.158.207.34}<o:p></o:p></p><p class=MsoNormal><b>Mar 23 23:44:22 [23719] DBG:nathelper:force_rtp_proxy_body: proxy reply: 0<o:p></o:p></b></p><p class=MsoNormal><b>Mar 23 23:44:22 [23719] ERROR:nathelper:force_rtp_proxy_body: incorrect port 0 in reply from rtp proxy<o:p></o:p></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In the debug on calls from EP2 to EP1, I got<o:p></o:p></p><p class=MsoNormal>Mar 24 00:06:02 [24298] DBG:nathelper:force_rtp_proxy_body: proxy reply: 48334<o:p></o:p></p><p class=MsoNormal>Mar 24 00:06:02 [24298] DBG:nathelper:force_rtp_proxy_body: proxy reply: 48126<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Can anyone shed some lights on what could be wrong?<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>Leon<span style='font-size:8.0pt;font-family:"Trebuchet MS","sans-serif";color:#4D4D4D'> <o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>