IMS S2-2c. SIP 183 Session Progress response: from S-CSCF2 to I-CSCF2

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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 S2-2c. SIP 183 Session Progress response: from S-CSCF2 to I-CSCF2

P-Charging-Vector: S-CSCF2 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: S-CSCF2 passes this header to I-CSCF2 for charging.