Tech-
invite
3GPP
space
IETF
space
SIP
↠
Examples
Grammars
Presence
⇾
Main
Services
Transaction
Dialog
IMS
TS 24.228
–
§7.2.3
–
§7.3.5
–
§7.4.3
When the called party answers, UE2 sends a 200 OK final response to the INVITE request to P-CSCF2, and starts the media flow(s) for this session.
P-CSCF2 approves the commitment of the QoS resources if it was not approved yet.