IMS S3-2c. SIP 183 Session Progress response: from S-CSCF2 to I-CSCF1

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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 S3-2c. SIP 183 Session Progress response: from S-CSCF2 to I-CSCF1

P-Charging-Vector: The S-CSCF adds the identifier of its own network to the terminating Inter Operator Identifier (IOI) parameter of this header and puts back the originating IOI parameter.
P-Charging-Function-Addresses: The S-CSCF passes this header to the I-CSCF for charging.