Re: [sr-dev] [kamailio/kamailio] CSeq issues with CANCEL after INVITE (#918)

After installing from package, it works better but there are some issues still:

# U x.x.x.50:5060 -> 85.14.79.130:6050 INVITE sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Record-Route: sip:x.x.x.50;lr=on;ftag=32fe7b01;did=b55.74b1. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.0. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. Max-Forwards: 69. Contact: sip:48221028008@x.x.x.167:52163;transport=UDP. To: sip:48732406302@x.x.x.50;transport=UDP. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 INVITE. Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE. Content-Type: application/sdp. Supported: replaces, norefersub, extended-refer, timer, X-cisco-serviceuri. Allow-Events: presence, kpml. Content-Length: 241. . v=0. o=Z 0 0 IN IP4 x.x.x.167. s=Z. c=IN IP4 x.x.x.167. t=0 0. m=audio 8000 RTP/AVP 3 110 8 0 98 101. a=rtpmap:110 speex/8000. a=rtpmap:98 iLBC/8000. a=fmtp:98 mode=20. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=sendrecv.

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 407 Proxy Authentication Required. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.0;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as29ba68ca. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Proxy-Authenticate: Digest realm="adescom", nonce="2ead1894". Content-Length: 0. .

# U x.x.x.50:5060 -> 85.14.79.130:6050 ACK sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.0. Max-Forwards: 69. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as29ba68ca. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 ACK. Content-Length: 0. .

# U x.x.x.50:5060 -> 85.14.79.130:6050 INVITE sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Record-Route: sip:x.x.x.50;lr=on;ftag=32fe7b01;did=b55.74b1. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. Max-Forwards: 69. Contact: sip:48221028008@x.x.x.167:52163;transport=UDP. To: sip:48732406302@x.x.x.50;transport=UDP. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE. Content-Type: application/sdp. Supported: replaces, norefersub, extended-refer, timer, X-cisco-serviceuri. Allow-Events: presence, kpml. Content-Length: 241. Proxy-Authorization: Digest username="USER", realm="adescom", nonce="2ead1894", uri="sip:48732406302@ctmx.3s.pl:6050", response="9ff5d37d98280fe6d8676d654a8d7812", algorithm=MD5. . v=0. o=Z 0 0 IN IP4 x.x.x.167. s=Z. c=IN IP4 x.x.x.167. t=0 0. m=audio 8000 RTP/AVP 3 110 8 0 98 101. a=rtpmap:110 speex/8000. a=rtpmap:98 iLBC/8000. a=fmtp:98 mode=20. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=sendrecv.

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 100 Trying. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Contact: sip:48732406302@85.14.79.130:6050. Content-Length: 0. X-CTMG-HangupCause: Normal Clearing. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 180 Ringing. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Contact: sip:48732406302@85.14.79.130:6050. Content-Length: 0. X-CTMG-HangupCause: Normal Clearing. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 183 Session Progress. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Contact: sip:48732406302@85.14.79.130:6050. Content-Type: application/sdp. Content-Length: 226. . v=0. o=root 7839 7839 IN IP4 85.14.79.130. s=session. c=IN IP4 85.14.79.130. t=0 0. m=audio 44578 RTP/AVP 8 101. a=rtpmap:8 PCMA/8000. a=ptime:20. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -.

# U x.x.x.50:5060 -> 85.14.79.130:6050 CANCEL sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2. Max-Forwards: 69. To: sip:48732406302@x.x.x.50;transport=UDP. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 CANCEL. Content-Length: 0. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 487 Request Terminated. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. X-CTMG-HangupCause: Normal Clearing. Reason: Q.850 ;cause=16 ;text="Normal Clearing". .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 200 OK. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 CANCEL. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. X-CTMG-HangupCause: Normal Clearing. .

# U x.x.x.50:5060 -> 85.14.79.130:6050 ACK sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1. Max-Forwards: 69. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 ACK. Content-Length: 0. P-K-CSeq-Auth: 3. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 500 Server error. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1;received=x.x.x.50. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 ACK. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. .

# U x.x.x.50:5060 -> 85.14.79.130:6050 CANCEL sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2. Max-Forwards: 69. To: sip:48732406302@x.x.x.50;transport=UDP. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 CANCEL. Content-Length: 0. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 200 OK. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 CANCEL. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 487 Request Terminated. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. X-CTMG-HangupCause: Normal Clearing. Reason: Q.850 ;cause=16 ;text="Normal Clearing". .

# U x.x.x.50:5060 -> 85.14.79.130:6050 ACK sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1. Max-Forwards: 69. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 ACK. Content-Length: 0. P-K-CSeq-Auth: 3. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 500 Server error. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1;received=x.x.x.50. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 ACK. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. .

# U x.x.x.50:5060 -> 85.14.79.130:6050 CANCEL sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2. Max-Forwards: 69. To: sip:48732406302@x.x.x.50;transport=UDP. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 CANCEL. Content-Length: 0. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 200 OK. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 CANCEL. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 487 Request Terminated. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. X-CTMG-HangupCause: Normal Clearing. Reason: Q.850 ;cause=16 ;text="Normal Clearing". .

# U x.x.x.50:5060 -> 85.14.79.130:6050 ACK sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1. Max-Forwards: 69. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 ACK. Content-Length: 0. P-K-CSeq-Auth: 3. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 500 Server error. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1;received=x.x.x.50. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 ACK. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. .

# U x.x.x.50:5060 -> 85.14.79.130:6050 CANCEL sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2. Max-Forwards: 69. To: sip:48732406302@x.x.x.50;transport=UDP. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 CANCEL. Content-Length: 0. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 200 OK. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 CANCEL. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 487 Request Terminated. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. X-CTMG-HangupCause: Normal Clearing. Reason: Q.850 ;cause=16 ;text="Normal Clearing". .

# U x.x.x.50:5060 -> 85.14.79.130:6050 ACK sip:48732406302@ctmx.3s.pl:6050 SIP/2.0. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1. Max-Forwards: 69. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 ACK. Content-Length: 0. P-K-CSeq-Auth: 3. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 500 Server error. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1;received=x.x.x.50. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 2 ACK. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 487 Request Terminated. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. X-CTMG-HangupCause: Normal Clearing. Reason: Q.850 ;cause=16 ;text="Normal Clearing". .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 487 Request Terminated. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. X-CTMG-HangupCause: Normal Clearing. Reason: Q.850 ;cause=16 ;text="Normal Clearing". .

# U 85.14.79.130:6050 -> x.x.x.50:5060 SIP/2.0 487 Request Terminated. Via: SIP/2.0/UDP x.x.x.50;branch=z9hG4bKf853.a86fa1ded7f4197c5ea1a1625d652c6f.1.cs2;received=x.x.x.50. Via: SIP/2.0/UDP x.x.x.167:52163;rport=52163;branch=z9hG4bK-d8754z-5ef22e5fe1c6a7e5-1---d8754z-. From: sip:48221028008@x.x.x.50;transport=UDP;tag=32fe7b01. To: sip:48732406302@x.x.x.50;transport=UDP;tag=as79702a93. Call-ID: YmY5NjBiYTJlM2YyMTM2OTY5MjQ1ZGE4NzNiN2YxYWE.. CSeq: 3 INVITE. User-Agent: Adescom CTM5000. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO. Max-Forwards: 70. Content-Length: 0. X-CTMG-HangupCause: Normal Clearing. Reason: Q.850 ;cause=16 ;text="Normal Clearing". .