{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/Device",
  "title": "Device",
  "type": "object",
  "description": "Device identifier for connectivity status queries",
  "properties": {
    "phoneNumber": {
      "type": "string",
      "description": "Mobile phone number in E.164 format",
      "example": "+12125551234"
    },
    "ipv4Address": {
      "type": "object",
      "description": "Device IPv4 address (alternative to phoneNumber)",
      "properties": {
        "publicAddress": {
          "type": "string",
          "description": "Public IPv4 address",
          "example": "203.0.113.42"
        },
        "privateAddress": {
          "type": "string",
          "description": "Private IPv4 address",
          "example": "10.0.0.5"
        },
        "publicPort": {
          "type": "integer",
          "description": "Public port if behind NAT",
          "example": 54321
        }
      }
    },
    "networkAccessIdentifier": {
      "type": "string",
      "description": "Network access identifier (alternative to phoneNumber)",
      "example": "user@example.com"
    }
  }
}