Tech-
invite
3GPP
space
IETF
space
SIP
↠
Examples
Grammars
Presence
⇾
Main
Services
Transaction
Dialog
IMS
TS 24.228
–
§6.2
I-CSCF1 requests information related to the Subscriber registration status by sending the private user identity, public user identity and visited domain name to the HSS. The HSS returns the S-CSCF name which was previously selected in step 1d.