{
  "Voice": {
    "EnableVolteByDefault": true
  },
  "Signaling": {
    "IncomingCallEndReasons": {
      "NoAnswerFromUser": {
        "Protocol": "Q.850",
        "TerminationEvent": "RemoteHangup",
        "ReasonHeaderCause": 18,
        "StatusCode": 480
      }
    },
    "AdditionalContactParams": {
      "REGISTER,INVITE,INVITE:*": "+g.3gpp.mid-call;+g.3gpp.srvcc-alerting;+g.3gpp.ps2cs-srvcc-orig-pre-alerting"
    },
    "UseIPSec": true
  }
}