***

id: 312d351e-f688-430f-bd63-b1c8db13bb76
title: Relay.Calling.DetectAction
slug: /node/reference/calling/actions/detect
description: 'The Detect Action is used to detect DTMF, fax tones, or answering machines.'
max-toc-depth: 3
----------------

[relay-calling-detectresult]: /docs/server-sdk/v2/node/reference/calling/results/detect

[relay-calling-stopresult]: /docs/server-sdk/v2/node/reference/calling/results/stop

This object returned from one of the *asynchronous* detect methods that represents a running detector on the call.

## Properties

| Property    | Type                                                       | Description                                  |
| ----------- | ---------------------------------------------------------- | -------------------------------------------- |
| `result`    | [`Relay.Calling.DetectResult`][relay-calling-detectresult] | Final detector result                        |
| `completed` | `boolean`                                                  | Whether the action has finished              |
| `payload`   | `object`                                                   | Payload sent to Relay to start this detector |
| `controlId` | `string`                                                   | UUID to identify the detector                |

## Methods

### stop

Stop the action immediately.

**Parameters**

*None*

**Returns**

`Promise<StopResult>` - Promise object that will be fulfilled with a [`Relay.Calling.StopResult`][relay-calling-stopresult] object.

**Examples**

> Trying to detect a machine and stop the action after 5 seconds.

```javascript
async function main() {
  const detectAction = await call.detectMachineAsync()

  // For demonstration purposes only..
  setTimeout(async () => {
    const stopResult = await detectAction.stop()
  }, 5000)
}

main().catch(console.error)
```