title: Troubles with calls by simple PJSIP softphone via Asterisk
body: <p>I need to make a simple softphone based on the PJSIP Library to make calls via Asterisk server. I used a simple example from PJSIP official site written on C ( <a href="http://www.pjsip.org/pjsip/docs/html/page_pjsip_sample_simple_pjsuaua_c.htm" rel="nofollow">http://www.pjsip.org/pjsip/docs/html/page_pjsip_sample_simple_pjsuaua_c.htm</a> ). This softphone can register on the Asterisk server (to make it work I replaced in the line 163 substring SIP_DOMAIN to "asterisk"), but can't make and receive calls.</p>
  
  <p>Software used:</p>
  
  <ul>
  <li>Asterisk 11.16.0 (distribution FreePBX 12.0.38)</li>
  <li>Softphone Zoiper 3.3.25608</li>
  <li>PJSIP Library 2.4</li>
  <li>My simple PJSIP softphone</li>
  </ul>
  
  <p>When I call from Zoiper to my softphone, I get the following message from the Asterisk:</p>
  
  <pre><code>...
    == Using SIP RTP TOS bits 184
    == Using SIP RTP CoS mark 5
         &gt; [INSERT INTO cel (eventtype,eventtime,cid_name,cid_num,cid_ani,cid_rdnis,cid_dnid,exten,context,channame,appname,appdata,amaflags,accountcode,uniqueid,linkedid,peer,userdeftype,userfield) VALUES ('CHAN_START',{ts '2015-05-17 22:11:01.20063'},'Danil Dushistov','100','','','','s','from-internal','SIP/100-0000000f','','',3,'','1431889861.15','1431889860.14','','','')]
      -- Called SIP/100
      -- Got SIP response 406 "Not Acceptable" back from 192.168.56.1:5060
      -- Connected line update to SIP/200-0000000e prevented.
         &gt; [INSERT INTO cel (eventtype,eventtime,cid_name,cid_num,cid_ani,cid_rdnis,cid_dnid,exten,context,channame,appname,appdata,amaflags,accountcode,uniqueid,linkedid,peer,userdeftype,userfield) VALUES ('HANGUP',{ts '2015-05-17 22:11:01.23544'},'Danil Dushistov','100','100','','','100','from-internal','SIP/100-0000000f','AppDial','(Outgoing Line)',3,'','1431889861.15','1431889860.14','','','')]
         &gt; [INSERT INTO cel (eventtype,eventtime,cid_name,cid_num,cid_ani,cid_rdnis,cid_dnid,exten,context,channame,appname,appdata,amaflags,accountcode,uniqueid,linkedid,peer,userdeftype,userfield) VALUES ('CHAN_END',{ts '2015-05-17 22:11:01.25763'},'Danil Dushistov','100','100','','','100','from-internal','SIP/100-0000000f','AppDial','(Outgoing Line)',3,'','1431889861.15','1431889860.14','','','')]
    == Everyone is busy/congested at this time (1:0/0/1)
  ...
  </code></pre>
  
  <p>192.168.56.1 is the IP-address of my softphone. Softphone returns the SIP response 406. I've read that this error may occur because Asterisk does not support the codec used in my softphone, but I don't know how to solve this problem.</p>
  
  <p>When I call from my softphone to Zoiper, I get the following message from the Asterisk server:</p>
  
  <pre><code>  == Using SIP RTP TOS bits 184
    == Using SIP RTP CoS mark 5
  [2015-05-17 22:02:59] NOTICE[1796][C-00000008]: chan_sip.c:10460 process_sdp: No compatible codecs, not accepting this offer!
  </code></pre>
  
  <p>and the following log from the PJSIP:</p>
  
  <pre><code>22:41:49.914 os_core_unix.c !pjlib 2.4 for POSIX initialized
  22:41:49.916 sip_endpoint.c  .Creating endpoint instance...
  22:41:49.916          pjlib  .select() I/O Queue created (0x20164e0)
  22:41:49.916 sip_endpoint.c  .Module "mod-msg-print" registered
  22:41:49.916 sip_transport.  .Transport manager created.
  22:41:49.916   pjsua_core.c  .PJSUA state changed: NULL --&gt; CREATED
  22:41:49.916 sip_endpoint.c  .Module "mod-pjsua-log" registered
  22:41:49.916 sip_endpoint.c  .Module "mod-tsx-layer" registered
  22:41:49.916 sip_endpoint.c  .Module "mod-stateful-util" registered
  22:41:49.916 sip_endpoint.c  .Module "mod-ua" registered
  22:41:49.916 sip_endpoint.c  .Module "mod-100rel" registered
  22:41:49.916 sip_endpoint.c  .Module "mod-pjsua" registered
  22:41:49.916 sip_endpoint.c  .Module "mod-invite" registered
  22:41:49.975       pa_dev.c  ..PortAudio sound library initialized, status=0
  22:41:49.975       pa_dev.c  ..PortAudio host api count=2
  22:41:49.975       pa_dev.c  ..Sound device count=9
  22:41:49.975          pjlib  ..select() I/O Queue created (0x206ae38)
  22:41:49.990 sip_endpoint.c  .Module "mod-evsub" registered
  22:41:49.990 sip_endpoint.c  .Module "mod-presence" registered
  22:41:49.990 sip_endpoint.c  .Module "mod-mwi" registered
  22:41:49.990 sip_endpoint.c  .Module "mod-refer" registered
  22:41:49.990 sip_endpoint.c  .Module "mod-pjsua-pres" registered
  22:41:49.990 sip_endpoint.c  .Module "mod-pjsua-im" registered
  22:41:49.990 sip_endpoint.c  .Module "mod-pjsua-options" registered
  22:41:49.990   pjsua_core.c  .1 SIP worker threads created
  22:41:49.990   pjsua_core.c  .pjsua version 2.4 for Linux-3.2.0.4/x86_64/glibc-2.19 initialized
  22:41:49.990   pjsua_core.c  .PJSUA state changed: CREATED --&gt; INIT
  22:41:49.990   pjsua_core.c  SIP UDP socket reachable at 192.168.1.45:5060
  22:41:49.990   udp0x2078e30  SIP UDP transport started, published address is 192.168.1.45:5060
  22:41:49.991   pjsua_core.c  PJSUA state changed: INIT --&gt; STARTING
  22:41:49.991 sip_endpoint.c  .Module "mod-unsolicited-mwi" registered
  22:41:49.991   pjsua_core.c  .PJSUA state changed: STARTING --&gt; RUNNING
  22:41:49.991    pjsua_acc.c  Adding account: id=sip:100@192.168.56.50
  22:41:49.991    pjsua_acc.c  .Account sip:100@192.168.56.50 added with id 0
  22:41:49.991    pjsua_acc.c  .Acc 0: setting registration..
  22:41:49.991   pjsua_core.c  ...TX 481 bytes Request msg REGISTER/cseq=4600 (tdta0x207e270) to UDP 192.168.56.50:5060:
  REGISTER sip:192.168.56.50 SIP/2.0
  Via: SIP/2.0/UDP 192.168.56.1:5060;rport;branch=z9hG4bKPjjg7lshYOjbgZMpe-G9PgeT2hJqNpcRdv
  Max-Forwards: 70
  From: &lt;sip:100@192.168.56.50&gt;;tag=9j1S8GzDdF6Vivl9FKqV3up5oVAenSzj
  To: &lt;sip:100@192.168.56.50&gt;
  Call-ID: It9SK0FiOteFTrpnKmfLCl6jYX0fHaKA
  CSeq: 4600 REGISTER
  Contact: &lt;sip:100@192.168.56.1:5060;ob&gt;
  Expires: 300
  Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
  Content-Length:  0
  
  
  --end msg--
  22:41:49.991    pjsua_acc.c  ..Acc 0: Registration sent
  22:41:49.991   pjsua_call.c  Making call with acc #0 to sip:200@192.168.56.50
  22:41:49.991    pjsua_aud.c  .Set sound device: capture=-1, playback=-2
  22:41:49.991    pjsua_aud.c  ..Opening sound device PCM@16000/1/20ms
  Expression 'SetApproximateSampleRate( pcm, hwParams, sr )' failed in 'src/../../../portaudio/src/hostapi/alsa/pa_linux_alsa.c', line: 1294
  Expression 'PaAlsaStreamComponent_InitialConfigure( &amp;self-&gt;capture, inParams, self-&gt;primeBuffers, hwParamsCapture, &amp;realSr )' failed in 'src/../../../portaudio/src/hostapi/alsa/pa_linux_alsa.c', line: 1870
  Expression 'PaAlsaStream_Configure( stream, inputParameters, outputParameters, sampleRate, framesPerBuffer, &amp;inputLatency, &amp;outputLatency, &amp;hostBufferSizeMode )' failed in 'src/../../../portaudio/src/hostapi/alsa/pa_linux_alsa.c', line: 1994
  Expression 'SetApproximateSampleRate( pcm, hwParams, sr )' failed in 'src/../../../portaudio/src/hostapi/alsa/pa_linux_alsa.c', line: 1294
  Expression 'PaAlsaStreamComponent_InitialConfigure( &amp;self-&gt;capture, inParams, self-&gt;primeBuffers, hwParamsCapture, &amp;realSr )' failed in 'src/../../../portaudio/src/hostapi/alsa/pa_linux_alsa.c', line: 1870
  Expression 'PaAlsaStream_Configure( stream, inputParameters, outputParameters, sampleRate, framesPerBuffer, &amp;inputLatency, &amp;outputLatency, &amp;hostBufferSizeMode )' failed in 'src/../../../portaudio/src/hostapi/alsa/pa_linux_alsa.c', line: 1994
  22:41:49.992    pjsua_aud.c  ..Opening sound device PCM@44100/1/20ms
  22:41:50.000   pjsua_core.c  .RX 568 bytes Response msg 401/REGISTER/cseq=4600 (rdata0x207a8b8) from UDP 192.168.56.50:5060:
  SIP/2.0 401 Unauthorized
  Via: SIP/2.0/UDP 192.168.56.1:5060;branch=z9hG4bKPjjg7lshYOjbgZMpe-G9PgeT2hJqNpcRdv;received=192.168.56.1;rport=5060
  From: &lt;sip:100@192.168.56.50&gt;;tag=9j1S8GzDdF6Vivl9FKqV3up5oVAenSzj
  To: &lt;sip:100@192.168.56.50&gt;;tag=as230b12f3
  Call-ID: It9SK0FiOteFTrpnKmfLCl6jYX0fHaKA
  CSeq: 4600 REGISTER
  Server: FPBX-12.0.38(11.16.0)
  Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  Supported: replaces, timer
  WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="6d994b8a"
  Content-Length: 0
  
  
  --end msg--
  22:41:50.016    ec0x2086730  ...AEC created, clock_rate=44100, channel=1, samples per frame=882, tail length=200 ms, latency=0 ms
  22:41:50.017  pjsua_media.c  .Call 0: initializing media..
  22:41:50.017  pjsua_media.c  ..RTP socket reachable at 192.168.1.45:4000
  22:41:50.017  pjsua_media.c  ..RTCP socket reachable at 192.168.1.45:4001
  22:41:50.017  pjsua_media.c  ..Media index 0 selected for audio call 0
  22:41:50.018   pjsua_core.c  ....TX 959 bytes Request msg INVITE/cseq=22306 (tdta0x2101770) to UDP 192.168.56.50:5060:
  INVITE sip:200@192.168.56.50 SIP/2.0
  Via: SIP/2.0/UDP 192.168.56.1:5060;rport;branch=z9hG4bKPjv47uapAPOzpF47Md8ymSg6Mqyye5WXmi
  Max-Forwards: 70
  From: sip:100@192.168.56.50;tag=tBQEHZS3c8MW5RF9jtG9v-saqjeoX6KP
  To: sip:200@192.168.56.50
  Contact: &lt;sip:100@192.168.56.1:5060;ob&gt;
  Call-ID: 6PpMjSTpXlf8hIQYyHGd8BnZO7ZEGU2I
  CSeq: 22306 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
  Content-Type: application/sdp
  Content-Length:   378
  
  v=0
  o=- 3640880510 3640880510 IN IP4 192.168.1.45
  s=pjmedia
  b=AS:63
  t=0 0
  a=X-nat:0
  m=audio 4000 RTP/AVP 98 97 99 104 96
  c=IN IP4 192.168.1.45
  b=TIAS:44000
  a=rtcp:4001 IN IP4 192.168.1.45
  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:96 telephone-event/8000
  a=fmtp:96 0-16
  
  --end msg--
  22:41:50.018 /media/sda2/te  .......Call 0 state=CALLING
  Press 'h' to hangup all calls, 'q' to quit
  22:41:50.018   pjsua_core.c  ....TX 640 bytes Request msg REGISTER/cseq=4601 (tdta0x207e270) to UDP 192.168.56.50:5060:
  REGISTER sip:192.168.56.50 SIP/2.0
  Via: SIP/2.0/UDP 192.168.56.1:5060;rport;branch=z9hG4bKPjNuuL0c7gLTmHBPLM9VtNf5N7-WbWMUKP
  Max-Forwards: 70
  From: &lt;sip:100@192.168.56.50&gt;;tag=9j1S8GzDdF6Vivl9FKqV3up5oVAenSzj
  To: &lt;sip:100@192.168.56.50&gt;
  Call-ID: It9SK0FiOteFTrpnKmfLCl6jYX0fHaKA
  CSeq: 4601 REGISTER
  Contact: &lt;sip:100@192.168.56.1:5060;ob&gt;
  Expires: 300
  Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
  Authorization: Digest username="100", realm="asterisk", nonce="6d994b8a", uri="sip:192.168.56.50", response="1593a80275d3cd818b5e891d730e7b64", algorithm=MD5
  Content-Length:  0
  
  
  --end msg--
  22:41:50.020   pjsua_core.c  .RX 563 bytes Response msg 401/INVITE/cseq=22306 (rdata0x7f2538002908) from UDP 192.168.56.50:5060:
  SIP/2.0 401 Unauthorized
  Via: SIP/2.0/UDP 192.168.56.1:5060;branch=z9hG4bKPjv47uapAPOzpF47Md8ymSg6Mqyye5WXmi;received=192.168.56.1;rport=5060
  From: sip:100@192.168.56.50;tag=tBQEHZS3c8MW5RF9jtG9v-saqjeoX6KP
  To: sip:200@192.168.56.50;tag=as35b7c5f1
  Call-ID: 6PpMjSTpXlf8hIQYyHGd8BnZO7ZEGU2I
  CSeq: 22306 INVITE
  Server: FPBX-12.0.38(11.16.0)
  Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  Supported: replaces, timer
  WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="5d5f6113"
  Content-Length: 0
  
  
  --end msg--
  22:41:50.020   pjsua_core.c  ..TX 334 bytes Request msg ACK/cseq=22306 (tdta0x7f2538004830) to UDP 192.168.56.50:5060:
  ACK sip:200@192.168.56.50 SIP/2.0
  Via: SIP/2.0/UDP 192.168.56.1:5060;rport;branch=z9hG4bKPjv47uapAPOzpF47Md8ymSg6Mqyye5WXmi
  Max-Forwards: 70
  From: sip:100@192.168.56.50;tag=tBQEHZS3c8MW5RF9jtG9v-saqjeoX6KP
  To: sip:200@192.168.56.50;tag=as35b7c5f1
  Call-ID: 6PpMjSTpXlf8hIQYyHGd8BnZO7ZEGU2I
  CSeq: 22306 ACK
  Content-Length:  0
  
  
  --end msg--
  22:41:50.020   pjsua_core.c  .......TX 1122 bytes Request msg INVITE/cseq=22307 (tdta0x2101770) to UDP 192.168.56.50:5060:
  INVITE sip:200@192.168.56.50 SIP/2.0
  Via: SIP/2.0/UDP 192.168.56.1:5060;rport;branch=z9hG4bKPjmB8.3nm0.MWuGbW9R1vOxqgjXMLYvQja
  Max-Forwards: 70
  From: sip:100@192.168.56.50;tag=tBQEHZS3c8MW5RF9jtG9v-saqjeoX6KP
  To: sip:200@192.168.56.50
  Contact: &lt;sip:100@192.168.56.1:5060;ob&gt;
  Call-ID: 6PpMjSTpXlf8hIQYyHGd8BnZO7ZEGU2I
  CSeq: 22307 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
  Authorization: Digest username="100", realm="asterisk", nonce="5d5f6113", uri="sip:200@192.168.56.50", response="ad3c39c86d7dd6423961cb288c6c85b3", algorithm=MD5
  Content-Type: application/sdp
  Content-Length:   378
  
  v=0
  o=- 3640880510 3640880510 IN IP4 192.168.1.45
  s=pjmedia
  b=AS:63
  t=0 0
  a=X-nat:0
  m=audio 4000 RTP/AVP 98 97 99 104 96
  c=IN IP4 192.168.1.45
  b=TIAS:44000
  a=rtcp:4001 IN IP4 192.168.1.45
  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:96 telephone-event/8000
  a=fmtp:96 0-16
  
  --end msg--
  22:41:50.023   pjsua_core.c  .RX 563 bytes Request msg OPTIONS/cseq=102 (rdata0x7f2538002908) from UDP 192.168.56.50:5060:
  OPTIONS sip:100@192.168.56.1:5060;ob SIP/2.0
  Via: SIP/2.0/UDP 192.168.56.50:5060;branch=z9hG4bK0f2ed1a5;rport
  Max-Forwards: 70
  From: "Unknown" &lt;sip:Unknown@192.168.56.50&gt;;tag=as483ca5c4
  To: &lt;sip:100@192.168.56.1:5060;ob&gt;
  Contact: &lt;sip:Unknown@192.168.56.50:5060&gt;
  Call-ID: 3f638eff709b69712c4e67c04f27ca33@192.168.56.50:5060
  CSeq: 102 OPTIONS
  User-Agent: FPBX-12.0.38(11.16.0)
  Date: Sun, 17 May 2015 19:41:49 GMT
  Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  Supported: replaces, timer
  Content-Length: 0
  
  
  --end msg--
  22:41:50.023   pjsua_core.c  .TX 697 bytes Response msg 200/OPTIONS/cseq=102 (tdta0x7f2538007790) to UDP 192.168.56.50:5060:
  SIP/2.0 200 OK
  Via: SIP/2.0/UDP 192.168.56.50:5060;rport=5060;received=192.168.56.50;branch=z9hG4bK0f2ed1a5
  Call-ID: 3f638eff709b69712c4e67c04f27ca33@192.168.56.50:5060
  From: "Unknown" &lt;sip:Unknown@192.168.56.50&gt;;tag=as483ca5c4
  To: &lt;sip:100@192.168.56.1;ob&gt;;tag=z9hG4bK0f2ed1a5
  CSeq: 102 OPTIONS
  Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
  Accept: application/sdp, application/pidf+xml, application/xpidf+xml, application/simple-message-summary, message/sipfrag;version=2.0, application/im-iscomposing+xml, text/plain
  Supported: replaces, 100rel, timer, norefersub
  Allow-Events: presence, message-summary, refer
  Content-Length:  0
  
  
  --end msg--
  22:41:50.024   pjsua_core.c  .RX 586 bytes Response msg 200/REGISTER/cseq=4601 (rdata0x7f2538002908) from UDP 192.168.56.50:5060:
  SIP/2.0 200 OK
  Via: SIP/2.0/UDP 192.168.56.1:5060;branch=z9hG4bKPjNuuL0c7gLTmHBPLM9VtNf5N7-WbWMUKP;received=192.168.56.1;rport=5060
  From: &lt;sip:100@192.168.56.50&gt;;tag=9j1S8GzDdF6Vivl9FKqV3up5oVAenSzj
  To: &lt;sip:100@192.168.56.50&gt;;tag=as230b12f3
  Call-ID: It9SK0FiOteFTrpnKmfLCl6jYX0fHaKA
  CSeq: 4601 REGISTER
  Server: FPBX-12.0.38(11.16.0)
  Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  Supported: replaces, timer
  Expires: 300
  Contact: &lt;sip:100@192.168.56.1:5060;ob&gt;;expires=300
  Date: Sun, 17 May 2015 19:41:49 GMT
  Content-Length: 0
  
  
  --end msg--
  22:41:50.024    pjsua_acc.c  ....SIP outbound status for acc 0 is not active
  22:41:50.024    pjsua_acc.c  ....sip:100@192.168.56.50: registration success, status=200 (OK), will re-register in 300 seconds
  22:41:50.024    pjsua_acc.c  ....Keep-alive timer started for acc 0, destination:192.168.56.50:5060, interval:15s
  22:41:50.025   pjsua_core.c  .RX 567 bytes Request msg NOTIFY/cseq=102 (rdata0x7f2538002908) from UDP 192.168.56.50:5060:
  NOTIFY sip:100@192.168.56.1:5060;ob SIP/2.0
  Via: SIP/2.0/UDP 192.168.56.50:5060;branch=z9hG4bK7fbbd337;rport
  Max-Forwards: 70
  From: "Unknown" &lt;sip:Unknown@192.168.56.50&gt;;tag=as64a7a4d0
  To: &lt;sip:100@192.168.56.1:5060;ob&gt;
  Contact: &lt;sip:Unknown@192.168.56.50:5060&gt;
  Call-ID: 3caf066966bb0ad629383a7123f7431a@192.168.56.50:5060
  CSeq: 102 NOTIFY
  User-Agent: FPBX-12.0.38(11.16.0)
  Event: message-summary
  Content-Type: application/simple-message-summary
  Content-Length: 88
  
  Messages-Waiting: no
  Message-Account: sip:*97@192.168.56.50
  Voice-Message: 0/0 (0/0)
  
  --end msg--
  22:41:50.025   pjsua_pres.c  .Got unsolicited NOTIFY from 192.168.56.50:5060..
  22:41:50.025   pjsua_core.c  ...TX 323 bytes Response msg 200/NOTIFY/cseq=102 (tdta0x7f2538007790) to UDP 192.168.56.50:5060:
  SIP/2.0 200 OK
  Via: SIP/2.0/UDP 192.168.56.50:5060;rport=5060;received=192.168.56.50;branch=z9hG4bK7fbbd337
  Call-ID: 3caf066966bb0ad629383a7123f7431a@192.168.56.50:5060
  From: "Unknown" &lt;sip:Unknown@192.168.56.50&gt;;tag=as64a7a4d0
  To: &lt;sip:100@192.168.56.1;ob&gt;;tag=z9hG4bK7fbbd337
  CSeq: 102 NOTIFY
  Content-Length:  0
  
  
  --end msg--
  22:41:50.031   pjsua_core.c  .RX 494 bytes Response msg 488/INVITE/cseq=22307 (rdata0x7f2538002908) from UDP 192.168.56.50:5060:
  SIP/2.0 488 Not acceptable here
  Via: SIP/2.0/UDP 192.168.56.1:5060;branch=z9hG4bKPjmB8.3nm0.MWuGbW9R1vOxqgjXMLYvQja;received=192.168.56.1;rport=5060
  From: sip:100@192.168.56.50;tag=tBQEHZS3c8MW5RF9jtG9v-saqjeoX6KP
  To: sip:200@192.168.56.50;tag=as35b7c5f1
  Call-ID: 6PpMjSTpXlf8hIQYyHGd8BnZO7ZEGU2I
  CSeq: 22307 INVITE
  Server: FPBX-12.0.38(11.16.0)
  Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  Supported: replaces, timer
  Content-Length: 0
  
  
  --end msg--
  22:41:50.032   pjsua_core.c  ..TX 334 bytes Request msg ACK/cseq=22307 (tdta0x7f253800b320) to UDP 192.168.56.50:5060:
  ACK sip:200@192.168.56.50 SIP/2.0
  Via: SIP/2.0/UDP 192.168.56.1:5060;rport;branch=z9hG4bKPjmB8.3nm0.MWuGbW9R1vOxqgjXMLYvQja
  Max-Forwards: 70
  From: sip:100@192.168.56.50;tag=tBQEHZS3c8MW5RF9jtG9v-saqjeoX6KP
  To: sip:200@192.168.56.50;tag=as35b7c5f1
  Call-ID: 6PpMjSTpXlf8hIQYyHGd8BnZO7ZEGU2I
  CSeq: 22307 ACK
  Content-Length:  0
  
  
  --end msg--
  22:41:50.032 /media/sda2/te  .....Call 0 state=DISCONNCTD
  22:41:50.032  pjsua_media.c  .....Call 0: deinitializing media..
  22:41:50.032  pjsua_media.c  ......Call 0: cleaning up provisional media, prov_med_cnt=1, med_cnt=0
  22:41:50.039 os_core_unix.c  Info: possibly re-registering existing thread
  22:41:51.031    pjsua_aud.c !Closing sound device after idle for 1 second(s)
  22:41:51.031    pjsua_aud.c  .Closing HDA Intel: ALC272X Analog (hw:0,0) sound playback device and HDA Intel: ALC272X Analog (hw:0,0) sound capture device
  </code></pre>