[May 16 12:48:22] ERROR[19075]: pjproject:0 <?>: 	sip_transport. Error processing 1139 bytes packet from UDP 2003:7a:577:3600:9ec7:a6ff:fe99:a32c:5060 : PJSIP syntax error exception when parsing 'Status Line' header on line 2 col 112:
SIP/2.0 200 OK
Via: SIP/2.0/UDP [2a01:7a0:3::2]:5060;rport=5060;branch=z9hG4bKPj2df943e2-04c6-4c84-a39e-b7226c5cce94;received=[2a01:7a0:3::2]
From: <sip:96@[2a01:7a0:3::2]>;tag=688b08fd-90f6-4d65-bfb7-1accd54a4120
To: <sip:9911@[2003:7a:577:3600:9ec7:a6ff:fe99:a32c];uniq=DB37BCB6573F1EDE1D728FDA5D3F8>;tag=CE4B473E49C8B813
Call-ID: 2ce378dc-ebfc-48e9-97f8-b1a85a44e5ec
CSeq: 30789 INVITE
Contact: <sip:99@[2003:7a:577:3600:9ec7:a6ff:fe99:a32c];uniq=DB37BCB6573F1EDE1D728FDA5D3F8>
User-Agent: AVM FRITZ!Box Fon WLAN 7390 84.06.83 (Mar  8 2017)
Supported: 100rel,replaces
Allow-Events: telephone-event,refer
Allow: INVITE,ACK,OPTIONS,CANCEL,BYE,UPDATE,PRACK,INFO,SUBSCRIBE,NOTIFY,REFER,MESSAGE,PUBLISH
Content-Type: application/sdp
Accept: application/sdp, multipart/mixed
Accept-Encoding: identity
Content-Length:   302

v=0
o=user 1392350 1392350 IN IP6 2003:7a:577:3600:9ec7:a6ff:fe99:a32c
s=Asterisk
c=IN IP6 2003:7a:577:3600:9ec7:a6ff:fe99:a32c
t=0 0
m=audio 7078 RTP/AVP 8 0 101
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:7079
a=ptime:30

-- end of packet.