src/connectivity/telephony/lib/qmi-protocol/protocol/nas.json

{
  "services": [
  {
    "name": "NAS",
    "type": "0x03",
    "message_structure": "standard",
    "result_structure": "standard",
    "messages": [
      {
        "name": "GetSignalStrength",
        "type": "0x0020",
        "version": "1.0",
        "request": [ ],
        "response": [
          {
            "param": "signal_strength",
            "id": "0x01",
            "type": "uint16",
            "subparams": [
              {
                "param": "signal_strength",
                "type": "int8"
              },
              {
                "param": "radio_interface",
                "type": "uint8"
              }
            ]
          }
        ]
      }
    ]
  }]
}