Hi, I am trying to establish a sip call over UMTS (3G) and couldn't get along with it. Looking at the log showed me that the client did not get any response from the stun server. Other clients, behind other NATs are able to call when using the same STUN server. I've tried it all using few public STUN servers and got the same results. I am dumping the lines from the log which seems to be relevant to the issue. 08:28:23.000 sip_endpoint.c Module "mod-pjsua-log" registered 08:28:23.000 pjsua_core.c Nameserver 208.67.222.222 added 08:28:23.000 sip_endpoint.c Module "mod-tsx-layer" registered 08:28:23.000 sip_endpoint.c Module "mod-stateful-util" registered 08:28:23.000 sip_endpoint.c Module "mod-ua" registered 08:28:23.000 sip_endpoint.c Module "mod-100rel" registered 08:28:23.000 sip_endpoint.c Module "mod-pjsua" registered 08:28:23.000 sip_endpoint.c Module "mod-invite" registered 08:28:23.000 pjsua_core.c STUN server stun.xten.com resolved, address is 75.101.138.128:3478 08:28:23.000 pasound.c PortAudio sound library initialized, status=0 08:28:23.000 pasound.c PortAudio host api count=2 08:28:23.000 pasound.c Sound device count=5 08:28:23.000 pjlib select() I/O Queue created (002639C4) 08:28:23.000 speex_codec.c Adjusting quality to 5 for uwb 08:28:23.000 pjsua_media.c pjmedia_codec_speex_init 08:28:23.000 conference.c Creating conference bridge with 254 ports 08:28:23.000 conference.c Sound device successfully created for port 0 08:28:23.000 natck0026DD80 Local address is 0.0.0.0:1146 08:28:23.000 natck0026DD80 Server set to 75.101.138.128:3478 08:28:23.000 natck0026DD80 Performing Test I: Binding request to 75.101.138.128:3478 08:28:23.000 natck0026DD80 TX 28 bytes STUN message to 75.101.138.128:3478: --- begin STUN message --- STUN Binding request Hdr: length=8, magic=11a95549, tsx_id=73267e830ffb599800000000 Attributes: CHANGE-REQUEST: length=4, value=0 (0x0) --- end of STUN message --- 08:28:23.000 stuntsx00289B0 STUN client transaction created 08:28:23.000 stuntsx00289B0 STUN sending message (transmit count=1) 08:28:23.000 sip_endpoint.c Module "mod-evsub" registered 08:28:23.000 sip_endpoint.c Module "mod-presence" registered 08:28:23.000 evsub.c Event pkg "presence" registered by mod-presence 08:28:23.000 sip_endpoint.c Module "mod-refer" registered 08:28:23.000 evsub.c Event pkg "refer" registered by mod-refer 08:28:23.000 sip_endpoint.c Module "mod-pjsua-pres" registered 08:28:23.000 sip_endpoint.c Module "mod-pjsua-im" registered 08:28:23.000 sip_endpoint.c Module "mod-pjsua-options" registered 08:28:23.000 pjsua_core.c 1 SIP worker threads created 08:28:23.000 pjsua_core.c pjsua version 0.9.0-trunk for win32-wince initialized 08:28:24.000 natck0026DD80 Performing Test II: Binding request with change address and port request to 75.101.138.128:3478 08:28:24.000 natck0026DD80 TX 28 bytes STUN message to 75.101.138.128:3478: --- begin STUN message --- STUN Binding request Hdr: length=8, magic=00294823, tsx_id=18be67844ae13d6c00000001 Attributes: CHANGE-REQUEST: length=4, value=6 (0x6) --- end of STUN message --- 08:28:24.000 stuntsx0028C46 STUN client transaction created 08:28:24.000 stuntsx0028C46 STUN sending message (transmit count=1) 08:28:24.000 stuntsx00289B0 STUN sending message (transmit count=2) 08:28:25.000 natck0026DD80 Performing Test III: Binding request with change port request to 75.101.138.128:3478 08:28:25.000 natck0026DD80 TX 28 bytes STUN message to 75.101.138.128:3478: --- begin STUN message --- STUN Binding request Hdr: length=8, magic=2cd672ae, tsx_id=69525f9016496df100000002 Attributes: CHANGE-REQUEST: length=4, value=2 (0x2) --- end of STUN message --- 08:28:25.000 stuntsx0028CC6 STUN client transaction created 08:28:25.000 stuntsx0028CC6 STUN sending message (transmit count=1) 08:28:25.000 stuntsx0028C46 STUN sending message (transmit count=2) 08:28:25.000 stuntsx00289B0 STUN sending message (transmit count=3) 08:28:26.000 stuntsx0028CC6 STUN sending message (transmit count=2) 08:28:26.000 stuntsx0028C46 STUN sending message (transmit count=3) 08:28:26.000 stuntsx00289B0 STUN sending message (transmit count=4) 08:28:27.000 stuntsx0028CC6 STUN sending message (transmit count=3) 08:28:27.000 stuntsx0028C46 STUN sending message (transmit count=4) 08:28:27.000 stuntsx00289B0 STUN sending message (transmit count=5) 08:28:27.000 pjsua_core.c Error contacting STUN server: Received no response from STUN server (PJLIB_UTIL_ESTUNNOTRESPOND) [status=320010] 08:28:28.000 stuntsx0028CC6 STUN sending message (transmit count=4) 08:28:28.000 stuntsx0028C46 STUN sending message (transmit count=5) 08:28:29.000 stuntsx00289B0 STUN sending message (transmit count=6) 08:28:29.000 stuntsx0028CC6 STUN sending message (transmit count=5) 08:28:30.000 stuntsx0028C46 STUN sending message (transmit count=6)
