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S4.  IMS Session Initiation signalling flow —
mobile origination in home network
termination in CS network

 

 

 

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IMS S4-2d. SIP 183 Session Progress response: from P-CSCF1 to UE1

S4-2d.  SIP 183 Session Progress response: from P-CSCF1 to UE1  (10 of 48)