Tag: VoLTE Call

  • 7. IMS Procedure: VoLTE Call

    The initial stages of setting up a VoLTE call are the processes of the initial attach, P-CSCF discovery and creating the default bearer for SIP signaling (by registering with the IMS network and subscribing to a registration eventpackage).The first step in a VoLTE call setup is a SIP INVITE request initiated by the calling UE. […]