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SIP ↠  ExamplesGrammarsPresence ⇾  MainServicesTransactionDialogIMS
TS 24.228§6.7.3   List   Prev   Next
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IMS R7 Registration signalling flow - Network-initiated deregistration upon UE roaming and registration to a new network - IMS R7-3a. SIP NOTIFY request: from S-CSCF1 to P-CSCF1