[Freeswitch-users] switch_rtp.c - Auto Changing Port

[David Ponzone]

Ross,

for the record, FS needs 20 packets to auto-adjust to the real source  
IP:port of the RTP stream.
So with a typical ptime of 20ms, that's 400ms before FS learns it, so  
before the audio works both ways.

David Ponzone  Direction Technique
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Le 06/09/2010 à 02:59, Ross McKillop a écrit :

> Hi,
>
> I have a number of SIP endpoints behind NAT on a cellular network  
> and am experiencing some odd behaviour with RTP traffic.
>
> No audio at all is present on the call for about the first 10s or  
> so, and then the following is shown in the console;
>
>> 2010-09-06 01:04:53.101801 [INFO] switch_rtp.c:2049 Auto Changing  
>> port from 10.21.6.213:4000 to 217.171.129.67:22263
>
> After which the call works perfectly.
>
> Is there any way I can force this process to happen quicker, within  
> the first second of the call? or is it possible to force FreeSWITCH  
> to use the external IP from the start?
>
> Any assistance you can offer would be much appreciated.
>
> Best Regards,
> Ross
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