We are test nat conditions. We have a ser.cfg configured about mediaproxy and everything works fine in the following configuration: 1. natted sip client (all kind of client) to pstn gateway. GOOD 2. natted sip client (sipura) to natted sip client (all kind of client). GOOD I have only the problem form patton (4552) natted to natted sip client. In this case the i have NO audio streaming. For exemple if call from sipura natted client to patton natted client everything is OK. This is the dispatcher log: Apr 23 15:18:01 voip1 proxydispatcher[2526]: command request de241b08-640f38fd(a)192.168.0.9 192.168.0.9:12058:audio 83.211.248.158 voip.convergenze.it local 192.168.0.3 remote Sipura/SPA2100-3.2.5(d) info=from:0681140017@voip.convergenze.it,to:08281962101@voip.convergenze.it,fromtag:928f2b8c6099c249o1,totag: Apr 23 15:18:01 voip1 proxydispatcher[2526]: forwarding to mediaproxy on voicegw1.convergenze.it:25060: got: '194.247.167.90 35662' Apr 23 15:18:01 voip1 proxydispatcher[2526]: command execution time: 208.19 ms Apr 23 15:18:09 voip1 proxydispatcher[2526]: command lookup de241b08-640f38fd(a)192.168.0.9 192.168.0.3:4960:audio 83.211.248.158 voip.convergenze.it local voip.convergenze.it unknown Patton=20SN4552=202BIS=20EUI=20MxSF=20v3.2.8.45=2000a0ba0149b5 info=from:0681140017@voip.convergenze.it,to:08281962101@voip.convergenze.it,fromtag:928f2b8c6099c249o1,totag:c86e8fae20c094f Apr 23 15:18:09 voip1 proxydispatcher[2526]: forwarding to mediaproxy on voicegw1.convergenze.it:25060: got: '194.247.167.90 35662' Apr 23 15:18:09 voip1 proxydispatcher[2526]: command execution time: 105.27 ms Apr 23 15:18:21 voip1 proxydispatcher[2526]: command delete de241b08-640f38fd(a)192.168.0.9 info= Apr 23 15:18:21 voip1 proxydispatcher[2526]: forwarding to mediaproxy on voicegw1.convergenze.it:25060: got: '' Apr 23 15:18:21 voip1 proxydispatcher[2526]: command execution time: 97.82 ms If the same patton is making the call i got the problem about no media streaming. This is the dispatcher log in this seocnd xase: Apr 23 15:20:53 voip1 proxydispatcher[2526]: command request f80cfcdf1483c972ff7a14ebce972d7c(a)voip.convergenze.it 192.168.0.3:4964:audio,192.168.0.3:4966:image 83.211.248.158 voip.convergenze.it local 192.168.0.3 remote Patton=20SN4552=202BIS=20EUI=20MxSF=20v3.2.8.45=2000a0ba0149b5 info=from:08281962101@voip.convergenze.it,to:800987787@voip.convergenze.it,fromtag:ec7de0fd9378643,totag: Apr 23 15:20:53 voip1 proxydispatcher[2526]: forwarding to mediaproxy on voicegw1.convergenze.it:25060: got: '194.247.167.90 35664 35666' Apr 23 15:20:53 voip1 proxydispatcher[2526]: command execution time: 215.59 ms Apr 23 15:21:03 voip1 proxydispatcher[2526]: command lookup f80cfcdf1483c972ff7a14ebce972d7c(a)voip.convergenze.it 192.168.0.9:12062:audio 83.211.248.158 voip.convergenze.it local voip.convergenze.it unknown Sipura/SPA2100-3.2.5(d) info=from:08281962101@voip.convergenze.it,to:800987787@voip.convergenze.it,fromtag:ec7de0fd9378643,totag:592f7200dfc751c9i1 Apr 23 15:21:03 voip1 proxydispatcher[2526]: forwarding to mediaproxy on voicegw1.convergenze.it:25060: got: '194.247.167.90 35664 35666' Apr 23 15:21:03 voip1 proxydispatcher[2526]: command execution time: 106.28 ms Apr 23 15:21:17 voip1 proxydispatcher[2526]: command delete f80cfcdf1483c972ff7a14ebce972d7c(a)voip.convergenze.it info= Apr 23 15:21:17 voip1 proxydispatcher[2526]: forwarding to mediaproxy on voicegw1.convergenze.it:25060: got: '' Apr 23 15:21:17 voip1 proxydispatcher[2526]: command execution time: 105.77 ms The main difference is that patton try to send image stream also. But i am not able to figure out what is the main problem preventing mediaproxy (1.4.2) to work correctly. Regards Rosario