Hi, currently we are developing a SIP-Client for iOS (using PJSIP/PJSUA with the current version). We use Freeswitch 1.6.18 (64 bit) on a bare metal server. Windows-Clients (such as Blink or Zoiper) work fine. And our iOS-App works fine also. BUT when we initialze an outgoing call, wait for ringing on the other hand and hangup up when it's ringing, we face an error. Freeswitch gives us "481 Call/Transaction Does Not Exist". I attached the corresponding SIP-Trace and you can see the error at the last block. The interesting thing: If we activate PJSIP with TCP and(!) UDP we face the error. BUT when we use only UDP it works fine. Is it a bug within PJSIP? Or anyone see an hint wihtin the SIP-Trace? Thanks in advance! recv 1247 bytes from udp/[77.119.248.251]:5060 at 11:36:21.330337: ------------------------------------------------------------------------ INVITE sip:+436641540180@telequest-occ.0049.org SIP/2.0 Via: SIP/2.0/UDP 77.119.248.251:5060;branch=z9hG4bK4b69df210aa918eb70770f8f50681c51 Via: SIP/2.0/UDP 192.168.178.110:5060;rport;branch=z9hG4bKPjBP3AvciR4ifGE8V3KBSuxInUNOQN8VLh From: <sip:102@telequest-occ.0049.org>;tag=DDna03R3v1t0hJut1phv2uhb4OxBMYnu To: <sip:+436641540180@telequest-occ.0049.org> Call-ID: VQlDTx2IUOlzd5QZuZHdLoqbyOGtmO1Z CSeq: 17632 INVITE Contact: <sip:102@77.119.248.251> max-forwards: 69 supported: replaces supported: 100rel supported: timer supported: norefersub session-expires: 1800 min-se: 90 user-agent: AdCall Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS Content-Type: application/sdp Content-Length: 480 v=0 o=- 3713765781 3713765781 IN IP4 77.119.248.251 s=pjmedia b=AS:84 t=0 0 a=X-nat:0 m=audio 7070 RTP/AVP 98 97 99 104 3 0 8 9 96 c=IN IP4 77.119.248.251 b=TIAS:64000 a=rtcp:4001 IN IP4 192.168.178.110 a=sendrecv a=rtpmap:98 speex/16000 a=rtpmap:97 speex/8000 a=rtpmap:99 speex/32000 a=rtpmap:104 iLBC/8000 a=fmtp:104 mode=30 a=rtpmap:3 GSM/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:9 G722/8000 a=rtpmap:96 telephone-event/8000 a=fmtp:96 0-16 ------------------------------------------------------------------------ send 432 bytes to udp/[77.119.248.251]:5060 at 11:36:21.330679: ------------------------------------------------------------------------ SIP/2.0 100 Trying Via: SIP/2.0/UDP 77.119.248.251:5060;branch=z9hG4bK4b69df210aa918eb70770f8f50681c51 Via: SIP/2.0/UDP 192.168.178.110:5060;rport;branch=z9hG4bKPjBP3AvciR4ifGE8V3KBSuxInUNOQN8VLh From: <sip:102@telequest-occ.0049.org>;tag=DDna03R3v1t0hJut1phv2uhb4OxBMYnu To: <sip:+436641540180@telequest-occ.0049.org> Call-ID: VQlDTx2IUOlzd5QZuZHdLoqbyOGtmO1Z CSeq: 17632 INVITE User-Agent: FreeSWITCH Content-Length: 0 ------------------------------------------------------------------------ send 945 bytes to udp/[77.119.248.251]:5060 at 11:36:21.331652: ------------------------------------------------------------------------ SIP/2.0 407 Proxy Authentication Required Via: SIP/2.0/UDP 77.119.248.251:5060;branch=z9hG4bK4b69df210aa918eb70770f8f50681c51 Via: SIP/2.0/UDP 192.168.178.110:5060;rport;branch=z9hG4bKPjBP3AvciR4ifGE8V3KBSuxInUNOQN8VLh From: <sip:102@telequest-occ.0049.org>;tag=DDna03R3v1t0hJut1phv2uhb4OxBMYnu To: <sip:+436641540180@telequest-occ.0049.org>;tag=0FgQ57apej24p Call-ID: VQlDTx2IUOlzd5QZuZHdLoqbyOGtmO1Z CSeq: 17632 INVITE User-Agent: FreeSWITCH Accept: application/sdp Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, path, replaces Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer Proxy-Authenticate: Digest realm="telequest-occ.0049.org", nonce="01e39fee-93b0-11e7-9b0b-45e8f1c3918a", algorithm=MD5, qop="auth" Content-Length: 0 ------------------------------------------------------------------------ recv 475 bytes from udp/[77.119.248.251]:5060 at 11:36:21.409776: ------------------------------------------------------------------------ ACK sip:+436641540180@telequest-occ.0049.org SIP/2.0 Via: SIP/2.0/UDP 77.119.248.251:5060;branch=z9hG4bK4b69df210aa918eb70770f8f50681c51 Via: SIP/2.0/UDP 192.168.178.110:5060;rport;branch=z9hG4bKPjBP3AvciR4ifGE8V3KBSuxInUNOQN8VLh From: <sip:102@telequest-occ.0049.org>;tag=DDna03R3v1t0hJut1phv2uhb4OxBMYnu To: <sip:+436641540180@telequest-occ.0049.org>;tag=0FgQ57apej24p Call-ID: VQlDTx2IUOlzd5QZuZHdLoqbyOGtmO1Z CSeq: 17632 ACK max-forwards: 69 Content-Length: 0 ------------------------------------------------------------------------ recv 1439 bytes from tcp/[77.119.248.251]:60186 at 11:36:21.457742: ------------------------------------------------------------------------ INVITE sip:+436641540180@telequest-occ.0049.org SIP/2.0 Via: SIP/2.0/TCP 192.168.178.110:60186;rport;branch=z9hG4bKPj4mpXCeY7uNSlFOUvRXIvfftWSq9PQE-7;alias Max-Forwards: 70 From: sip:102@telequest-occ.0049.org;tag=DDna03R3v1t0hJut1phv2uhb4OxBMYnu To: sip:+436641540180@telequest-occ.0049.org Contact: <sip:102@192.168.178.110:5060;ob> Call-ID: VQlDTx2IUOlzd5QZuZHdLoqbyOGtmO1Z CSeq: 17633 INVITE Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS Supported: replaces, 100rel, timer, norefersub Session-Expires: 1800 Min-SE: 90 User-Agent: AdCall Proxy-Authorization: Digest username="102", realm="telequest-occ.0049.org", nonce="01e39fee-93b0-11e7-9b0b-45e8f1c3918a", uri="sip:+436641540180@telequest-occ.0049.org", response="c7fef167bd3ecc40bdaeaaef9c9b8085", algorithm=MD5, cnonce="raNBupUIEw5CyLL8MQbvYrk5txEd3Zep", qop=auth, nc=00000001 Content-Type: application/sdp Content-Length: 482 v=0 o=- 3713765781 3713765781 IN IP4 192.168.178.110 s=pjmedia b=AS:84 t=0 0 a=X-nat:0 m=audio 4000 RTP/AVP 98 97 99 104 3 0 8 9 96 c=IN IP4 192.168.178.110 b=TIAS:64000 a=rtcp:4001 IN IP4 192.168.178.110 a=sendrecv a=rtpmap:98 speex/16000 a=rtpmap:97 speex/8000 a=rtpmap:99 speex/32000 a=rtpmap:104 iLBC/8000 a=fmtp:104 mode=30 a=rtpmap:3 GSM/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:9 G722/8000 a=rtpmap:96 telephone-event/8000 a=fmtp:96 0-16 ------------------------------------------------------------------------ send 380 bytes to tcp/[77.119.248.251]:60186 at 11:36:21.457978: ------------------------------------------------------------------------ SIP/2.0 100 Trying Via: SIP/2.0/TCP 192.168.178.110:60186;rport=60186;branch=z9hG4bKPj4mpXCeY7uNSlFOUvRXIvfftWSq9PQE-7;alias;received=77.119.248.251 From: sip:102@telequest-occ.0049.org;tag=DDna03R3v1t0hJut1phv2uhb4OxBMYnu To: sip:+436641540180@telequest-occ.0049.org Call-ID: VQlDTx2IUOlzd5QZuZHdLoqbyOGtmO1Z CSeq: 17633 INVITE User-Agent: FreeSWITCH Content-Length: 0 ------------------------------------------------------------------------ send 1193 bytes to tcp/[77.119.248.251]:60186 at 11:36:24.966185: ------------------------------------------------------------------------ SIP/2.0 183 Session Progress Via: SIP/2.0/TCP 192.168.178.110:60186;rport=60186;branch=z9hG4bKPj4mpXCeY7uNSlFOUvRXIvfftWSq9PQE-7;alias;received=77.119.248.251 From: sip:102@telequest-occ.0049.org;tag=DDna03R3v1t0hJut1phv2uhb4OxBMYnu To: <sip:+436641540180@telequest-occ.0049.org>;tag=1r9F72USBUrQj Call-ID: VQlDTx2IUOlzd5QZuZHdLoqbyOGtmO1Z CSeq: 17633 INVITE Contact: <sip:+436641540180@88.217.132.183:5060;transport=udp> User-Agent: FreeSWITCH Accept: application/sdp Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, path, replaces Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer Content-Type: application/sdp Content-Disposition: session Content-Length: 203 Remote-Party-ID: "+436641540180" <sip:+436641540180@telequest-occ.0049.org>;party=calling;privacy=off;screen=no v=0 o=FreeSWITCH 1504753876 1504753877 IN IP4 88.217.132.183 s=FreeSWITCH c=IN IP4 88.217.132.183 t=0 0 m=audio 23108 RTP/AVP 3 a=rtpmap:3 GSM/8000 a=ptime:20 a=rtcp:23109 IN IP4 88.217.132.183 ------------------------------------------------------------------------ recv 401 bytes from tcp/[77.119.248.251]:60186 at 11:36:28.869708: ------------------------------------------------------------------------ CANCEL sip:+436641540180@telequest-occ.0049.org SIP/2.0 Via: SIP/2.0/TCP 192.168.178.110:5060;rport;branch=z9hG4bKPj4mpXCeY7uNSlFOUvRXIvfftWSq9PQE-7;alias Max-Forwards: 70 From: sip:102@telequest-occ.0049.org;tag=DDna03R3v1t0hJut1phv2uhb4OxBMYnu To: sip:+436641540180@telequest-occ.0049.org Call-ID: VQlDTx2IUOlzd5QZuZHdLoqbyOGtmO1Z CSeq: 17633 CANCEL User-Agent: AdCall Content-Length: 0 ------------------------------------------------------------------------ send 400 bytes to tcp/[77.119.248.251]:60186 at 11:36:28.869807: ------------------------------------------------------------------------ SIP/2.0 481 Call/Transaction Does Not Exist Via: SIP/2.0/TCP 192.168.178.110:5060;rport=60186;branch=z9hG4bKPj4mpXCeY7uNSlFOUvRXIvfftWSq9PQE-7;alias;received=77.119.248.251 From: sip:102@telequest-occ.0049.org;tag=DDna03R3v1t0hJut1phv2uhb4OxBMYnu To: <sip:+436641540180@telequest-occ.0049.org>;tag=1r9F72USBUrQj Call-ID: VQlDTx2IUOlzd5QZuZHdLoqbyOGtmO1Z CSeq: 17633 CANCEL Content-Length: 0 ------------------------------------------------------------------------ Best regards, Thorsten