Is it possible to create VOLTE user services directly in UDC without going through mmtel? I mean, without using Sh interfaces?
How does a MT Call comes from Legacy Network to VoLTE Registered User? Will It comes with a SIP INVITE or as a CS Service Notification? Any Spec References?
Volte: How ip packets flows through the IMS network when voice call initiated by user. Will ip packets goes through the CSCF nodes or through which IMS nodes it will flow to reach the end user.
Is it mandatory that for a UE in VOLTE call and data IP Address must be different (different bearer)