chromium/chromeos/components/test/data/onc/cellular_apn_policies.onc

{
  "Type": "Cellular",
  "Name": "Test Network",
  "Cellular": {
    "AllowRoaming": true,
    "APN": {
      "AccessPointName": "test-apn-1",
      "ApnTypes": ["Default"],
      "IpType": "",
      "Username": "test-username",
      "Password": "test-password",
      "State": "Enabled",
      "Source": "Admin"
    },
    "AutoConnect": true,
    "CustomAPNList": [
      {
        "AccessPointName": "test-apn-1",
        "ApnTypes": ["Default"],
        "IpType": "",
        "Username": "test-username",
        "Password": "test-password",
        "State": "Enabled",
        "Source": "Admin"
      },
      {
        "AccessPointName": "test-apn-1",
        "ApnTypes": ["Attach"],
        "IpType": "",
        "Username": "test-username",
        "Password": "test-password",
        "State": "Disabled",
        "Source": "Admin"
      },
      {
        "AccessPointName": "test-apn-2",
        "ApnTypes": ["Default"],
        "Authentication": "CHAP",
        "Username": "test-username",
        "Password": "test-password",
        "State": "Enabled",
        "Source": "Admin"
      },
      {
        "AccessPointName": "test-apn-3",
        "ApnTypes": ["Default", "Attach"],
        "Authentication": "PAP",
        "IpType": "IPv4orIPv6",
        "Username": "test-username",
        "Password": "test-password",
        "State": "Enabled",
        "Source": "Admin"
      },
      {
        "AccessPointName": "test-apn-4",
        "ApnTypes": ["Default", "Attach", "Tether"],
        "Authentication": "CHAP",
        "IpType": "IPv4orIPv6",
        "Username": "test-username",
        "Password": "test-password",
        "State": "Enabled",
        "Source": "Admin"
      }
    ]
  }
}