IMS S2-1d. SIP INVITE request (UE1 to UE2): from I-CSCF2 to S-CSCF2

Tech-invite 3GPPspace IETFspace

SIP ↠ Examples Grammars Presence ⇾ Main Services Transaction Dialog IMS

TS 24.228 – §7.2.3 – §7.3.5 – §7.4.3

IMS S2 signalling flow - Session Initiation: mobile origination and termination in home network - IMS S2-1d. SIP INVITE request (UE1 to UE2): from I-CSCF2 to S-CSCF2

I-CSCF2 does not add itself to the Record-Route header, as it has no need to remain in the signalling path once the session is established.