{
  "Signaling": {
    "supportPEarlyMediaHeader": true,
    "InviteErrorResponsesToTriggerCSFB": "3XX,5XX,6XX",
    "useIPSec": true,
    "ringingTimer": 45,
    "ForbiddenRegistrationErrorCodes": "-4XX",
    "ussdEnabled": true,
    "preconditions": "supportedButMandatory",
    "ringbackTimer": 90,
    "registrationRetryIntervals": "30,60+15,120,480,900,1800",
    "AllowedPdpTypeMask": 1,
    "earlyMediaNeedsHeader": true,
    "AdditionalContactParams": {
      "REGISTER,INVITE,INVITE:*": "+g.3gpp.mid-call;+g.3gpp.srvcc-alerting;+g.3gpp.ps2cs-srvcc-orig-pre-alerting"
    },
    "TriggerCSFBOnSdpError": true,
    "RegistrationExpiration": 7200,
    "MaxForbiddenErrors": "100"
  },
  "ConferenceCalling": {
    "conferenceServer": "sip:mmtel@conf-factory.ims.mnc${MNC}.mcc${MCC}.3gppnetwork.org",
    "SendConferenceSubscribeInNewDialog": true,
    "AlwaysSubscribeToConferenceEvents": true,
    "SendConferenceSubscribeAfterRefers": true
  },
  "AllowHandoverWithoutIMSVoiceService": true,
  "Media": {
    "RingbackTone": "UK",
    "UseSDPTemplateWhenAnswering": true,
    "enableBandwidthSpecifiers": true,
    "rtcpInterval": 5
  },
  "XCAP": {
    "supported": false
  }
}

[
  {
    "DefaultProtocolMask": 3,
    "password": "",
    "type-mask": 49,
    "username": "",
    "apn": "airtelgprs.com",
    "AllowedProtocolMask": 3
  },
  {
    "DefaultProtocolMask": 1,
    "password": "",
    "type-mask": 131072,
    "username": "",
    "apn": "ims",
    "AllowedProtocolMask": 1
  },
  {
    "DefaultProtocolMask": 3,
    "password": "",
    "type-mask": 4,
    "username": "",
    "apn": "airtelmms.com",
    "AllowedProtocolMask": 3
  }
]