I'm not sure what all would be useful from the log, but here's what I think are the interesting bits (with some names and addresses modified)...
18-01-09 17:03:01:620 MESSAGE Changing [client] [INVITE] transaction [0x4c19a30], from state [INIT] to [CALLING]
2018-01-09 17:03:01:621 MESSAGE channel [0x4bd3a80]: message sent to [UDP://TARGETDOMAIN.com:5060], size: [1873] bytes
INVITE sip:address@hidden SIP/2.0
Via: SIP/2.0/UDP 192.168.119.128:5060;branch=z9hG4bK.FF86uOS4G;rport
To: sip:address@hidden
CSeq: 20 INVITE
Call-ID: 2jzznVQEDP
Max-Forwards: 70
Supported: replaces, outbound
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, UPDATE
Content-Type: application/sdp
Content-Length: 946
Contact: <
sip:address@hidden;transport=udp>;+sip.instance="<urn:uuid:189dcf71-0336-40fa-93bb-cf171cf2aa42>"
User-Agent: Linphone Desktop/4.1.1 (belle-sip/1.6.3)
Proxy-Authorization: Digest realm="
sip.linphone.org", nonce="M7r/3QAAAAA7LW7yAACjngun/VAAAAAA", algorithm=MD5, opaque="+GNywA==", username="MyUserName", uri="sip:address@hidden", response="7910c766fe3a9ce2835a097cb378ba6f", cnonce="HMXOeAlwCD6kbGJp", nc=00000003, qop=auth
v=0
o=MyUserName 2834 396 IN IP4 192.168.119.128
s=Talk
c=IN IP4 192.168.119.128
t=0 0
a=ice-pwd:3b84d959a1ac2209af667740
a=ice-ufrag:760fdf3c
a=rtcp-xr:rcvr-rtt=all:10000 stat-summary=loss,dup,jitt,TTL voip-metrics
m=audio 51016 RTP/AVPF 96 97 98 0 8 18 101 99 100
c=IN IP4 205.175.250.247
a=rtpmap:96 opus/48000/2
a=fmtp:96 useinbandfec=1
a=rtpmap:97 speex/16000
a=fmtp:97 vbr=on
a=rtpmap:98 speex/8000
a=fmtp:98 vbr=on
a=fmtp:18 annexb=yes
a=rtpmap:101 telephone-event/48000
a=rtpmap:99 telephone-event/16000
a=rtpmap:100 telephone-event/8000
a=rtcp:43312
a=candidate:1 1 UDP 2130706431 192.168.119.128 7078 typ host
a=candidate:1 2 UDP 2130706430 192.168.119.128 7079 typ host
a=candidate:2 1 UDP 1694498815 205.175.250.247 51016 typ srflx raddr 192.168.119.128 rport 7078
a=candidate:2 2 UDP 1694498814 205.175.250.247 43312 typ srflx raddr 192.168.119.128 rport 7079
a=rtcp-fb:* trr-int 5000
a=rtcp-fb:* ccm tmmbr
2018-01-09 17:03:01:641 MESSAGE channel [0x4bd3a80]: received [336] new bytes from [UDP://TARGETDOMAIN.com:5060]:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.119.128:5060;branch=z9hG4bK.FF86uOS4G;received=10.88.143.159;rport=54346;ingress-zone=DefaultZone
Call-ID: 2jzznVQEDP
CSeq: 20 INVITE
To: <sip:address@hidden>
Server: TANDBERG/4131 (X8.6.1)
Content-Length: 0
2018-01-09 17:03:01:646 MESSAGE channel [0x4bd3a80] [336] bytes parsed
2018-01-09 17:03:01:646 MESSAGE channel [0x4bd3a80]: discovered public ip and port are [
10.88.143.159:54346]
2018-01-09 17:03:01:646 MESSAGE Found transaction matching response.
2018-01-09 17:03:01:646 MESSAGE Changing [client] [INVITE] transaction [0x4c19a30], from state [CALLING] to [PROCEEDING]
2018-01-09 17:03:01:646 MESSAGE op [0x2d4ccb0] : set_or_update_dialog() current=[(nil)] new=[(nil)]
2018-01-09 17:03:01:646 MESSAGE Op [0x2d4ccb0] receiving call response [100], dialog is [(nil)] in state [BELLE_SIP_DIALOG_NULL]
2018-01-09 17:03:01:799 MESSAGE channel [0x4bd3a80]: received [468] new bytes from [UDP://TARGETDOMAIN.com:5060]:
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 192.168.119.128:5060;branch=z9hG4bK.FF86uOS4G;received=10.88.143.159;rport=54346;ingress-zone=DefaultZone
Call-ID: 2jzznVQEDP
CSeq: 20 INVITE
To: <sip:address@hidden>;tag=62daac57f5e0e873
Record-Route: <sip:address@hidden:5060;transport=udp;lr>
Server: TANDBERG/4131 (X8.6.1)
Content-Length: 0
2018-01-09 17:03:01:804 MESSAGE channel [0x4bd3a80] [468] bytes parsed
2018-01-09 17:03:01:804 MESSAGE Found transaction matching response.
2018-01-09 17:03:01:804 MESSAGE New client dialog [0x4c08520] , local tag [cRV-aL4fo], remote tag [62daac57f5e0e873]
2018-01-09 17:03:01:804 MESSAGE Dialog [0x4c08520]: now updated by transaction [0x4c19a30].
2018-01-09 17:03:01:804 MESSAGE op [0x2d4ccb0] : set_or_update_dialog() current=[(nil)] new=[0x4c08520]
2018-01-09 17:03:01:804 MESSAGE Op [0x2d4ccb0] receiving call response [180], dialog is [0x4c08520] in state [BELLE_SIP_DIALOG_EARLY]
2018-01-09 17:03:01:804 MESSAGE Doing SDP offer/answer process of type outgoing
2018-01-09 17:03:01:804 MESSAGE ms_filter_unlink: MSRtpRecv:0x473a560,0-->MSVoidSink:0x4987580,0
2018-01-09 17:03:01:805 MESSAGE speex_lib_ctl init with neon ? 0
2018-01-09 17:03:01:806 MESSAGE Configuring resampler input with rate=[8000], nchannels=[1]
2018-01-09 17:03:01:806 MESSAGE MSFilePlayer[0x4be6a40]: /app/share/sounds/linphone/ringback.wav opened: rate=8000,channel=1
2018-01-09 17:03:01:806 MESSAGE configuring resampler output to rate=[8000], nchannels=[1]
2018-01-09 17:03:01:806 MESSAGE ms_filter_link: MSFilePlayer:0x4be6a40,0-->MSDtmfGen:0x4bfafb0,0
2018-01-09 17:03:01:806 MESSAGE ms_filter_link: MSDtmfGen:0x4bfafb0,0-->MSResample:0x473a560,0
2018-01-09 17:03:01:806 MESSAGE ms_filter_link: MSResample:0x473a560,0-->MSPulseWrite:0x4987580,0
2018-01-09 17:03:01:806 MESSAGE Initializing speex resampler in mode [voip]
2018-01-09 17:03:01:992 WARNING Player: We are late of 180 miliseconds.
2018-01-09 17:03:01:992 WARNING MSAudio MSTicker: We are late of 178 miliseconds.
2018-01-09 17:03:01:993 MESSAGE pulseaudio playback stream connected (8000Hz, 1ch)
2018-01-09 17:03:01:993 MESSAGE Remote ringing...
2018-01-09 17:03:01:993 MESSAGE Call 0x45e3a70: moving from state LinphoneCallOutgoingProgress to LinphoneCallOutgoingRinging
2018-01-09 17:03:01:993 MESSAGE Linphone core [0x7f8598008610] notified [call_state_changed]
2018-01-09 17:03:01:995 MESSAGE Priority used: 99
2018-01-09 17:03:01:995 MESSAGE Ring MSTicker setpriority() failed: Permission denied, nevermind.
2018-01-09 17:03:02:915 MESSAGE channel [0x4bd3a80]: keep alive sent to [UDP://TARGETDOMAIN.com:5060]
2018-01-09 17:03:05:493 MESSAGE channel [0x4bd3a80]: received [920] new bytes from [UDP://TARGETDOMAIN.com:5060]:
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.119.128:5060;branch=z9hG4bK.FF86uOS4G;received=10.88.143.159;rport=54346;ingress-zone=DefaultZone
Call-ID: 2jzznVQEDP
CSeq: 20 INVITE
Contact: <sip:address@hidden>
To: <sip:address@hidden>;tag=62daac57f5e0e873
Record-Route: <sip:address@hidden:5060;transport=udp;lr>
Allow: INVITE,ACK,BYE,CANCEL,INFO,REFER,NOTIFY
Server: TANDBERG/4131 (X8.6.1)
Content-Type: application/sdp
Content-Length: 324
v=0
o=tandberg 0 1 IN IP4 127.0.0.1
s=-
c=IN IP4 AAA.BBB.CCC.100
b=AS:1536
t=0 0
m=audio 52248 RTP/AVP 18 8 0 101
b=TIAS:64000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=rtcp:52249 IN IP4 AAA.BBB.CCC.100
2018-01-09 17:03:05:498 MESSAGE channel [0x4bd3a80] [596] bytes parsed
2018-01-09 17:03:05:498 MESSAGE channel [0x4bd3a80] read [324] bytes of body from [TARGETDOMAIN.com:5060]
2018-01-09 17:03:05:499 MESSAGE Found transaction matching response.
2018-01-09 17:03:05:499 MESSAGE Changing [client] [INVITE] transaction [0x4c19a30], from state [PROCEEDING] to [ACCEPTED]
2018-01-09 17:03:05:499 MESSAGE Dialog [0x4c08520]: now updated by transaction [0x4c19a30].
2018-01-09 17:03:05:499 MESSAGE op [0x2d4ccb0] : set_or_update_dialog() current=[0x4c08520] new=[0x4c08520]
2018-01-09 17:03:05:499 MESSAGE Op [0x2d4ccb0] receiving call response [200], dialog is [0x4c08520] in state [BELLE_SIP_DIALOG_CONFIRMED]
2018-01-09 17:03:05:506 MESSAGE Found payload G729/8000 fmtp=annexb=no
2018-01-09 17:03:05:506 MESSAGE Found payload PCMA/8000 fmtp=
2018-01-09 17:03:05:506 MESSAGE Found payload PCMU/8000 fmtp=
2018-01-09 17:03:05:506 MESSAGE Found payload telephone-event/8000 fmtp=0-15
2018-01-09 17:03:05:506 MESSAGE Doing SDP offer/answer process of type outgoing
2018-01-09 17:03:05:506 MESSAGE Processing for stream 0
2018-01-09 17:03:05:506 WARNING No matching stream for 0
2018-01-09 17:03:05:506 MESSAGE Call 0x45e3a70: moving from state LinphoneCallOutgoingRinging to LinphoneCallConnected
2018-01-09 17:03:05:553 MESSAGE Linphone core [0x7f8598008610] notified [call_state_changed]
2018-01-09 17:03:05:553 ERROR Incompatible SDP answer received, need to abort the call