IMS R2-1e. SIP REGISTER request: from I-CSCF1 to S-CSCF1

SIP ↠ Examples Grammars Presence ⇾ Main Services Transaction Dialog IMS

TS 24.228 – §6.3

IMS R2 signalling flow - Re-Registration: User currently registered - IMS R2-1e. SIP REGISTER request: from I-CSCF1 to S-CSCF1

Upon receiving this request S-CSCF1 will detect that it already has a registration record for UE1 and will reset its SIP registration timer for UE1 to the Expires time in this request.