QCI 5 is mandatory for IMS SIP Signalling? What If Network assign different QCI (Say 6 or 8) for IMS Default Bearer? Will SIP Signalling still flow?
Is it mandatory to establish a separate default bearer to exchange IMS signaling messages between UE and IMS network nodes ? Can't internet default bearer be used for the same ?
Which of the network node initiates dedicated bearer creation for the VoLTE call ?