Hi Ian, 

Sincere thanks for your reply. 

I am attaching a patch herewith. Please let me know if you are referring to the 
same and this patch did not work for me. If it works for you can you pl let me 
know wat are changes that has to be made in the opensip,cfg file? 

Else if patch is different, pl send me the patch. 

Regards, 
Arjun 

----- Original Message ----- 
From: "Ian Buckner" <[email protected]> 
To: "OpenSIPS users mailling list" <[email protected]> 
Sent: Monday, June 11, 2012 3:48:40 PM GMT +05:30 Chennai, Kolkata, Mumbai, New 
Delhi 
Subject: Re: [OpenSIPS-Users] No Voice Comm in Conference call 

Hi Arjun, 


Regarding rtpproxy - if it makes your life easier, there is a very simple patch 
for the rtpproxy source which allows you to specify an advertised IP address on 
the command line this will be returned to OpenSips and inserted into SDP rather 
than the listening address. I used this last week for a server behind NAT and 
it worked perfectly. 


If you want to mail me I'll happily send you a patched tarball of source. 




best, 


Ian 












On 11 Jun 2012, at 11:14, Bogdan-Andrei Iancu wrote: 



Hi Arjun, 

If you have no audio at all for the call to Conf Server, you need to check the 
signaling, particularity speaking the SDP part to be sure you inserted RTPProxy 
correctly between UAC and Conf Server. 

So, make a SIP capture for the call to Conf and check if the IPs in SDP are 
correct. 

Regards, 
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer http://www.opensips-solutions.com 
On 06/07/2012 05:46 PM, Arjun Shankar K S wrote: 

Hi All, 

Greetings to everyone !!! 

I have set up opensips and RTP Proxy in two different hosts since I have 
opensips in a Natted environment where RTP Proxy refused to budge. 

Now I have installed RTP Proxy in a direct public IP. Normal calls between 2 
Client is working great !! 

During conference call, the calls get connected but there is no voice 
communication between any of them and soon the client who was connected last, 
gets disconnected. 

I could not find much support regarding this issue. Any support is sincerely 
appreciated. 

In my opensips.cfg, I have made the following config changes for RTP in 
different host, 

------Nat Params------------- 
modparam("usrloc","nat_bflag", 6) 
modparam("nathelper","rtpproxy_sock", "udp:rtp_proxy_publicIP:7890") 
modparam("nathelper","natping_interval", 30) 
modparam("nathelper","ping_nated_only", 0) 
modparam("nathelper","sipping_bflag", 7) 
modparam("nathelper","sipping_from", "sip:pinger@PROXY_IP" ) 
modparam("registrar","received_avp", "$avp(i:42)") 
modparam("nathelper","received_avp", "$avp(i:42)") 

I am running my RTP Proxy using the following command, 

./rtpproxy -l rtp_proxy_publicIP -s udp:*:7890 -F 


Thanks, 
Arjun 
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