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

[Ross McKillop]

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