IMS S1-7b. SIP 180 Ringing response (INVITE): from P-CSCF2 to S-CSCF2

Tech-invite 3GPPspace IETFspace

SIP ↠ Examples Grammars Presence ⇾ Main Services Transaction Dialog IMS

TS 24.228 – §7.2.2 – §7.3.2 – §7.4.2

IMS S1 signalling flow - Session Initiation: Mobile origination and termination roaming, with different network operators - IMS S1-7b. SIP 180 Ringing response (INVITE): from P-CSCF2 to S-CSCF2

Record-Route: P-CSCF2 rewrites the Record-Route header field value to remove the port number and the comp=sigcomp parameter from its own entry.