[Serusers] SER and RTPproxy

Jeff Russell jeff_russell at advanis.ca
Tue Oct 6 23:24:19 CEST 2009

Thanks I have followed all parts of the call, and I am not sure how  
the ip-phone should be getting the RTPproxy IP address is in the SDP  
of the 183 (with SDP) or 200 (OK with SDP) The far end connection (c)  
info is set correctly I just do not know what should be informing the  
IP-Phone should the 183 be change in SER when the onreply route calls  

I think this is where the error is:
0(60402) ERROR: extract_body: message body has length zero
0(60402) ERROR: force_rtp_proxy2: can't extract body from the message

Any ideas?

On 2009-10-06, at 11:08 AM, Edson - Lists wrote:

> I would suggest You to use NGREP and sniff both legs of the  
> communication flow...
> See what SER receives and responds, what's on the SDP body and look  
> at syslog to understand what RTPproxy is doing. Maybe also take a  
> look on what the internal client is sending and receiving.
> It should give You some hints.
> Edson.
> Jeff Russell escreveu:
>> I Think I have thing configured correctly and yet I can not make  
>> things work correctly.
>> This is what I am do
>> I have SER on an internal (10.1.1.x) IP address
>> I have RTPproxy on a different machine with a public IP address   
>> 206.75.15.x
>> I am routing the call out over our firewall and things 'almost' work.
>> SER sets up the call using the RTPproxy to set up the ports for the  
>> RTP stream, and the RTP stream is returned from the far end to the  
>> public IP address, however non of the RTP traffic is sent to the  
>> internal address, I am guessing it is waiting for an rtp stream  
>> from the internal address but neither SER nor the ip-phone send  
>> anything or even seem to know about the RTPproxy.
>> Can anyone offer ANY suggestions as to how to direct the internal  
>> RTP stream to the RTPproxy address?
>> Many thanks,
>> Jeffr
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