Hi Freeswitch community I was wondering if someone could help me with the above? The scenario is that I have one sip client connected to Freeswitch over 3G, and one connected via Wifi. When I make a call from the wifi to 3G, I can see in the console debug messages this - 2011-10-28 12:14:42.777087 [INFO] switch_rtp.c:3164 Auto Changing port from 192.168.16.18:60416 to 193.xxx.xxx.123:60416 Success, the audio flows both ways. However, when I then make a call from 3G to Wifi, I do not get this line in the debug messages for the wifi sip client. Why is this? Does the auto change only apply to the originating sip client? The 3G client is passing the correct IP in the SDP details due to there being a SIP ALG router in place to change the details. Any help is greatly appreciated, as always. Kind regards Ben