IMS S3-7b. SIP 180 Ringing response (INVITE): from P-CSCF2 to S-CSCF2

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SIP ↠ Examples Grammars Presence ⇾ Main Services Transaction Dialog IMS

TS 24.228 – §7.2.4 – §7.3.5 – §7.4.3

IMS S3 signalling flow - Session Initiation: Origination in CS Network, and Mobile termination in home network - IMS S3-7b. SIP 180 Ringing response (INVITE): from P-CSCF2 to S-CSCF2

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