INVITE sip:5556667777;npdi;rn=8889990000@5.5.5.5;user=phone SIP/2.0
From: "FromUser"<sip:5553334444@2.2.2.2;user=phone>;tag=714539940-1535391478434-
To: <sip:5556667777@1.1.1.1:5060;user=phone>
Call-ID: 181910844198@6.6.6.6
CSeq: 1044076882 INVITE
Contact: <sip:5553334444;tgrp=8000;trunk-contextBS@2.2.2.2:5060;transport=udp>
P-Asserted-Identity: "FromUser"<sip:5553334444@2.2.2.2;user=phone>
FS responds with ...
SIP/2.0 183 Session Progress
From: "FromUser"<sip:5553334444@2.2.2.2;user=phone>;tag=714539940-1535391478434-
To: <sip: 5556667777@1.1.1.1:5060;user=phone>;tag=p4Q6eH4D5KcaD
Call-ID: 181910844198@6.6.6.6
CSeq: 1044076882 INVITE
Contact: <sip:5556667777@5.5.5.5:5060;transport=udp>
User-Agent: FreeSWITCH-mod_sofia/1.6.19~64bit
P-Asserted-Identity: "5556667777;npdi;rn=8889990000" <sip:5556667777;npdi;rn=8889990000@1.1.1.1