{
  "Signaling": {
    "InviteErrorResponsesToTriggerCSFB": "403,500,503,504",
    "DefaultAuthAlgorithm": "AKAv1-MD5",
    "Preconditions": "Supported",
    "EarlyMediaNeedsHeader": true,
    "AlwaysAddSipInstance": true,
    "AdditionalContactParams": {
      "INVITE,INVITE:*": "+g.3gpp.srvcc-alerting;+g.3gpp.ps2cs-srvcc-orig-pre-alerting;+g.3gpp.mid-call"
    },
    "RequirePreconditionsWhenMandatory": false,
    "AlwaysSendSessionProgress": true
  },
  "XCAP": {
    "supported": false
  },
  "Voice": {
    "EnableVolteByDefault": true
  },
  "ConferenceCalling": {
    "conferenceServer": "sip:mmtel@conf-factory.ims.mnc${MNC}.mcc${MCC}.3gppnetwork.org"
  }
}