> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vobiz.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Retell AI integration (dashboard)

> Connect Retell AI to Vobiz SIP trunking without code - no-code dashboard setup for outbound and inbound AI voice calls in 130+ countries.

This guide shows how to integrate Retell AI with Vobiz using the dashboard so your AI agents can make outbound calls to any phone number.

<iframe width="100%" height="420" src="https://www.youtube.com/embed/sC09VD0zGRA" title="Retell AI Integration Video" frameBorder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowFullScreen style={{ borderRadius: "12px", marginTop: "1rem", marginBottom: "1rem" }} />

<Tip>
  **Prefer using API/CLI?** Check out the [API setup guide](/integrations/retellai-api) for curl commands and programmatic integration.
</Tip>

## What you'll build

A no-code outbound calling setup where your Retell AI agent reaches customers using your Vobiz phone number and SIP trunk for transport.

## Prerequisites

* **Retell AI account** → [Sign up](https://dashboard.retellai.com)
* **Vobiz account** with active balance → [Create account](https://console.vobiz.ai/auth/signup)
* **Retell AI agent** created → [Create in dashboard](https://dashboard.retellai.com/agents)
* **Phone number** from Vobiz (for caller ID)

## Step-by-step setup

<Steps>
  <Step title="Open the phone numbers section">
    Log in to the [Retell Dashboard](https://dashboard.retellai.com), navigate to **Phone Numbers** in the sidebar, and click the **+** button to add a new number.

    <img className="block w-full rounded-xl border border-gray-200" src="https://mintcdn.com/vobizai/Y8H0uUEbmzwRjqm8/images/retellai-images/img1.png?fit=max&auto=format&n=Y8H0uUEbmzwRjqm8&q=85&s=a72f644a03c161f475d9e7111b0baec8" width="388" height="216" data-path="images/retellai-images/img1.png" />
  </Step>

  <Step title="Select SIP trunking">
    Choose **Connect to your number via SIP trunking**. This option lets you use your own Vobiz phone number and SIP infrastructure instead of buying a number from Retell.

    <img className="block w-full rounded-xl border border-gray-200" src="https://mintcdn.com/vobizai/Y8H0uUEbmzwRjqm8/images/retellai-images/img2.png?fit=max&auto=format&n=Y8H0uUEbmzwRjqm8&q=85&s=b851d0f8f33da43dd1146c28123174da" width="400" height="155" data-path="images/retellai-images/img2.png" />
  </Step>

  <Step title="Configure the SIP trunk">
    Fill in the required fields:

    <img className="block w-full rounded-xl border border-gray-200" src="https://mintcdn.com/vobizai/Y8H0uUEbmzwRjqm8/images/retellai-images/img3.png?fit=max&auto=format&n=Y8H0uUEbmzwRjqm8&q=85&s=5f4769b8d525c4ba24c19fd10f2c0766" width="560" height="686" data-path="images/retellai-images/img3.png" />

    | Field               | Value                                                                                             |
    | ------------------- | ------------------------------------------------------------------------------------------------- |
    | Phone Number        | Your Vobiz number in E.164 format (for example, `+1234567890`)                                    |
    | Termination URI     | Your Vobiz SIP domain (for example, `abc123.sip.vobiz.ai`) - **do not** include the `sip:` prefix |
    | SIP Trunk User Name | Your Vobiz trunk username                                                                         |
    | SIP Trunk Password  | Your Vobiz trunk password                                                                         |
    | Nickname            | Friendly name (for example, `Vobiz Main Line`)                                                    |

    Click **Save** to complete the configuration.
  </Step>

  <Step title="Make a batch call">
    Click on your configured phone number and select **Create a batch call**. Fill in:

    <img className="block w-full rounded-xl border border-gray-200" src="https://mintcdn.com/vobizai/Y8H0uUEbmzwRjqm8/images/retellai-images/img4.png?fit=max&auto=format&n=Y8H0uUEbmzwRjqm8&q=85&s=29c91d092c05bb89d56aeff62afd1a2d" width="681" height="879" data-path="images/retellai-images/img4.png" />

    * **Batch Call Name** - campaign name (for example, `Customer Outreach`)
    * **From number** - your configured Vobiz number
    * **Upload Recipients** - CSV file with phone numbers
    * **When to send** - `Send Now` or `Schedule`

    Click **Send** or **Schedule** to launch the campaign.
  </Step>
</Steps>

<Check>
  **Dashboard setup complete!** Your Retell AI agent can now make outbound calls through Vobiz SIP infrastructure.
</Check>

## Where to find your Vobiz credentials

* **Console:** [Vobiz Console](https://console.vobiz.ai) → **Trunks** → your trunk
* **API:** see the [SIP trunks documentation](/trunks)

For CSV format requirements, see the [Retell batch calling docs](https://docs.retellai.com).

## Troubleshooting

### "Phone number not found"

Phone number not configured in Retell.

* Verify the number is in E.164 format (`+countrycode + number`).
* Re-configure the phone number using the steps above.
* Check that the number exists in the [Vobiz Console](https://console.vobiz.ai).

### Call fails immediately

SIP authentication or configuration issue.

* Verify your Vobiz username and password in the [Vobiz Console](https://console.vobiz.ai).
* Use the exact Vobiz domain (for example, `abc123.sip.vobiz.ai`).
* Do **not** include a `sip:` prefix.
* Try a different transport type (TCP vs UDP) in the trunk config.

### Agent doesn't speak

Agent not configured or not published.

* Ensure the agent is published in [Retell Dashboard → Agents](https://dashboard.retellai.com/agents).
* Check the agent has a voice configured.
* Verify the agent ID matches the phone number config.

<Tip>
  Need more detail? See the [API troubleshooting guide](/integrations/retellai-api#troubleshooting) for additional error scenarios.
</Tip>

## Next steps

* **Customize your agent** - configure voice, personality, and prompts in [Retell Dashboard → Agents](https://dashboard.retellai.com/agents).
* **View call analytics** - monitor call logs and transcripts in **Retell Dashboard** → **Calls**.
* **Automate with API** - trigger calls programmatically using the [Retell AI API setup guide](/integrations/retellai-api).
* **Monitor usage** - track your Vobiz balance and call records.