> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes.

# DialOptions

> Options for SignalWire.dial.

Options for [SignalWire.dial](/docs/browser-sdk/v4/reference/signalwire). Extends [MediaOptions](/docs/browser-sdk/v4/reference/interfaces/media-options) with dial-specific settings.

## **Extends**

* [`MediaOptions`](/docs/browser-sdk/v4/reference/interfaces/media-options)

## **Properties**

**`nodeId`** `string`

Optional node ID for routing the call

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**`preferredAudioCodecs`** `string[]`

Preferred audio codecs for this call (overrides global preferences).

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**`preferredVideoCodecs`** `string[]`

Preferred video codecs for this call (overrides global preferences).

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**`stereo`** `boolean`

Enable stereo Opus for this call (overrides global preferences).

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**`userVariables`** `Record<string, unknown>`

Custom variables sent with the Verto invite. Merged with `client.preferences.userVariables` and any query-string variables on the destination URI; values here take precedence.

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#### Inherited from MediaOptions

**`audio`** `boolean`

Enable audio input. Defaults to `true` when not specified.

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**`inputAudioDeviceConstraints`** `MediaTrackConstraints`

Custom constraints for the audio input track. See [`MediaTrackConstraints`](https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints).

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**`inputAudioStream`** `MediaStream`

Pre-existing audio stream to use instead of `getUserMedia`. See [`MediaStream`](https://developer.mozilla.org/en-US/docs/Web/API/MediaStream).

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**`inputVideoDeviceConstraints`** `MediaTrackConstraints`

Custom constraints for the video input track. See [`MediaTrackConstraints`](https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints).

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**`inputVideoStream`** `MediaStream`

Pre-existing video stream to use instead of `getUserMedia`. See [`MediaStream`](https://developer.mozilla.org/en-US/docs/Web/API/MediaStream).

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**`receiveAudio`** `boolean`

Whether to receive remote audio.

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**`receiveVideo`** `boolean`

Whether to receive remote video.

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**`video`** `boolean`

Enable video input. Defaults to `false` when not specified.

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> Options for SignalWire.dial.