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### New in 3.17

The SignalWire connector has been made generally available in Rasa Pro 3.17.

Use this channel to connect your Rasa assistant to [SignalWire](https://www.signalwire.com/). SignalWire is a cloud communications platform that provides Voice APIs and phone numbers.

## Basic Rasa configuration

Create or edit your `credentials.yml` and add a new channel configuration:

```yaml
signalwire:
  server_url: "<your-domain>"
  username: "<username>"
  password: "<password>"
  asr:
    name: "deepgram"  # or "azure"
    # ASR-specific configuration
  tts:
    name: "deepgram"  # or "cartesia", "azure"
    # TTS-specific configuration
  interruptions:  # optional
    enabled: true
    min_words: 3
```

You can run that assistant using `rasa run`. To configure the SignalWire channel, you will need a URL to your Rasa assistant. You can use a tunneling solution like [ngrok](https://ngrok.com/) to expose your assistant for development.

## Configuring SignalWire

To route calls to your Rasa assistant, you need to have a SignalWire account and a phone number.

1. Sign up for [SignalWire](https://www.signalwire.com/).

2. Once logged in, buy a phone number from SignalWire.

3. Create a _cXML Script_ with _Calling_ call type. To route calls to your assistant, choose to handle using External URL. You'll either need to deploy your assistant to a server or use a tunneling solution like [ngrok](https://ngrok.com/) for development.

The External URL will be in the format `wss://<your-server>/webhooks/signalwire/webhook`

or if using ngrok, it will look like this:
`wss://recently-communal-duckling.ngrok-free.app/webhooks/signalwire/webhook`

4. You can add Status change URL.

It will be in the format `wss://<your-server>/webhooks/signalwire/call_status`

or in the case of ngrok look like this:
`wss://recently-communal-duckling.ngrok-free.app/webhooks/signalwire/call_status`

5. After saving the script, in the _Addresses & Phone Numbers_ section, add the chosen number to your application.

## Usage

You can call the SignalWire number from any other number in order to talk to the deployed bot.

### Audio format

The default audio format on SignalWire channel is **Linear 16 bit 24KHz PCM mono**