Hi,
find attached the shortend print from the call flow after the invite and the corresponding RINGING
PBX = 10.13.1.11
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 10.13.1.11:5060;branch=z9hG4bK1584313586-4045285799
Record-Route: <sip:111@10.13.1.9;lr=on;ftag=0_1584313609-4045285800>
From: "XXX" <sip:222@10.13.1.11>;tag=0_1584313609-4045285800
Call-ID: 1584313518-4045285798
CSeq: 1 INVITE
Contact: <sip:111@10.13.188.26:2096;line=jsv3fzb0>;reg-id=1
Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE, PRACK, MESSAGE, INFO, UPDATE
Allow-Events: talk, hold, refer, call-info
Content-Length: 0
To: <sip:111@10.13.1.11>;tag=eyg5fb0c55
SIP/2.0 487 Hang UP!!
Via: SIP/2.0/UDP 10.13.1.11:5060;branch=z9hG4bK1584313586-4045285799
From: "XXX" <sip:222@10.13.1.11>;tag=0_1584313609-4045285800
To: <sip:111@10.13.1.11>;tag=435c30b48d1cee7e4a824c683c3f4b30-3cc8
Call-ID: 1584313518-4045285798
CSeq: 1 INVITE
Server: Mitel-3300-ICP 20.0.1.22
Content-Length: 0
ACK sip:111@10.13.1.9 SIP/2.0
Via: SIP/2.0/UDP 10.13.1.11:5060;branch=z9hG4bK1584313586-4045285799
Max-Forwards: 70
From: "XXX" <sip:222@10.13.1.11>;tag=0_1584313609-4045285800
To: <sip:111@10.13.1.11>;tag=435c30b48d1cee7e4a824c683c3f4b30-3cc8;foo=eyg5fb0c55
Call-ID: 1584313518-4045285798
CSeq: 1 ACK
Contact: "XXX" <sip:222@10.13.1.11:5060;transport=udp>
Content-Length: 0
SIP/2.0 487 Request Terminated
Via: SIP/2.0/UDP 10.13.1.9;branch=z9hG4bK512b.dcce644afc8542d59d7e82fb9b3026a3.0,SIP/2.0/UDP 10.13.188.25:2089;received=10.13.188.25;branch=z9hG4bK-5294pweqrwb5;rport=2089
Record-Route: <sip:111@10.13.1.9;lr=on;ftag=jpm1qqzybq>
Warning: 399 10.13.1.11 "30H Call Termination"
From: "XXX" <sip:222@10.13.1.9>;tag=jpm1qqzybq
To: <sip:111@10.13.1.9>;tag=0_1584304610-4045285797
Call-ID: 3c7d78956044-ln5kyize81qj
CSeq: 3 INVITE
Server: Mitel-3300-ICP 20.0.1.22
Content-Length: 0