Tech-invite  3GPPspace  IETFspace
SIP ↠  Examples  Grammars  Presence ⇾  Main  Services  Transaction  Dialog  IMS 
TS 24.228 – §6.6   List   Prev   Next
Top   Up   Prev   Next
IMS R4 Registration signalling flow - P-CSCF subscription for registration state event package - IMS R4-1b. SIP SUBSCRIBE request: from I-CSCF1 to S-CSCF1