{
  "Signaling": {
    "InviteErrorResponsesToTriggerCSFB": "3XX,4XX,5XX,6XX",
    "ReRegisterOnErrorCodes": "403",
    "CallEndReasons": {
      "NetworkError": {
        "ReasonHeaderCause": 487
      },
      "Deregistering": {
        "ReasonHeaderCause": 487,
        "ReasonHeaderText": "Deregistering"
      },
      "EmptyConference": {
        "ReasonHeaderCause": 487,
        "ReasonHeaderText": "Conference call is empty"
      },
      "MediaHeartbeatTimeout": {
        "ReasonHeaderCause": 487,
        "ReasonHeaderText": ""
      },
      "MediaTimeout": {
        "ReasonHeaderCause": 487,
        "ReasonHeaderText": "RTP Timeout"
      },
      "RejectedByUser": {
        "ReasonHeaderCause": 487,
        "ReasonHeaderText": "Call Rejected By User"
      },
      "InvalidSdp": {
        "ReasonHeaderCause": 487,
        "ReasonHeaderText": "Invalid SDP"
      },
      "RemoteCancel": {
        "ReasonHeaderCause": 487
      },
      "HoldResumeTimeout": {
        "ReasonHeaderCause": 487,
        "ReasonHeaderText": "Hold/resume timeout"
      },
      "SessionExpired": {
        "ReasonHeaderCause": 487,
        "ReasonHeaderText": "Session Expired"
      }
    },
    "SupportPEarlyMediaHeader": true,
    "MaxUdpMessageSize": 1200,
    "RingbackTimerSeconds": 130,
    "RingingTimerSeconds": 60,
    "ussdEnabled": true,
    "EarlyMediaNeedsHeader": true,
    "AlwaysSendSessionProgress": true,
    "CountryOfOriginationFormat": "BOTH",
    "Preconditions": "Supported",
    "AdditionalContactParams": {
      "REGISTER,INVITE,INVITE:*": "+g.3gpp.mid-call;+g.3gpp.srvcc-alerting;+g.3gpp.ps2cs-srvcc-orig-pre-alerting"
    },
    "SipTimers": {
      "InviteResponseTimeout": 20000
    },
    "TriggerCSFBOnSDPError": true,
    "DropRegistrationOnSRVCC": true,
    "SendLocalTimeZoneInformation": true,
    "UseIPSec": true
  },
  "AllowHandoverWithoutIMSVoiceService": true,
  "SMS": {
    "allowCSFBInVolteMode": true
  },
  "Media": {
    "AllowHoldMusic": true,
    "PreferredAMRWBMode": 8,
    "EnableBandwidthSpecifiers": true,
    "InactivityTimerRTCPSeconds": 10,
    "MaxRedundancy": 220,
    "RingbackTone": "CEPT",
    "UseSDPTemplateWhenAnswering": true,
    "IncludeSDPMaxRed": true,
    "UseSDPTemplateForAllInvites": false
  },
  "Voice": {
    "EnableVolteByDefault": true,
    "E911OverCSIfNoIMSReg": true,
    "E911OverIMSSupported": true
  }
}

[
  {
    "DefaultProtocolMask": 3,
    "password": "",
    "type-mask": 49,
    "enableXLAT464": true,
    "username": "",
    "apn": "Internet.btonephone.com",
    "AllowedProtocolMask": 3
  },
  {
    "DefaultProtocolMask": 3,
    "password": "",
    "type-mask": 131072,
    "SupportSwitchOver": true,
    "username": "",
    "apn": "ims.mnc008.mcc234.uktel.org",
    "AllowedProtocolMask": 3
  },
  {
    "type-mask": 4,
    "password": "",
    "tech-type-mask": 4,
    "username": "",
    "apn": "mms.btonephone.com"
  },
  {
    "DefaultProtocolMask": 3,
    "password": "",
    "type-mask": 262144,
    "username": "",
    "apn": "sos",
    "AllowedProtocolMask": 3
  }
]