# Import a number (/en/ai/studio/deploy/import)

> For AI agents: see the complete documentation index at [llms.txt](/llms.txt).

Import phone numbers to use for inbound and outbound calls with your deployed agents. Currently, Agent Studio supports importing numbers from Twilio's Elastic SIP Trunk.

## What is Elastic SIP Trunk? [#what-is-elastic-sip-trunk]

Elastic SIP Trunk is the connection layer between traditional phone networks and Studio. When a caller dials your phone number, their carrier routes the call over the public telephone network. Elastic SIP Trunk translates that call into a format Studio can process, and passes it to your configured agent.

The "elastic" part means the trunk scales automatically with call volume; the same configuration handles one call or thousands without any changes on your end.

Studio currently supports Elastic SIP Trunk integration with Twilio. Support for additional providers is planned.

## Prerequisites [#prerequisites]

* An active Twilio account with Elastic SIP Trunk configured. See [Set up SIP trunk](sip-trunk).
* A deployed agent in Agent Studio
* A phone number configured in your Twilio SIP trunk
* SIP domain and credentials from your Twilio account

## Import a phone number [#import-a-phone-number]

To import a phone number from your Twilio SIP trunk:

1. In Agent Studio, select **Phone Numbers** from the sidebar.

   ![Import phone number](https://assets-docs.agora.io/images/conversational-ai/studio/import-phone-number-1.png)

2. Click **Add Phone Number**.

   ![Import phone number](https://assets-docs.agora.io/images/conversational-ai/studio/import-phone-number-2.png)

3. Fill in the required information:

   * **Phone Number**: Enter the phone number in E.164 format (for example, `+1234567890`)
   * **Vendor**: Select **Twilio** (currently the only supported vendor)
   * **Display Name**: Enter a descriptive name to help you identify this number
   * **SIP Trunk Address**: Enter your Twilio SIP domain
   * **SIP Trunk Username**: Enter your Twilio SIP username.
   * **SIP Trunk Password**: Enter your Twilio SIP password.
   * **Transport Protocol**: Select the protocol for SIP communication. Choose **TLS** if Secure Trunking is enabled in your Twilio SIP trunk, otherwise choose **TCP** or **UDP**.

4. Click **Add Phone Number** to import the phone number.

Your imported phone number is now available for use in inbound and outbound calls.

## Manage imported numbers [#manage-imported-numbers]

### Edit a phone number [#edit-a-phone-number]

To update the configuration of an imported phone number:

1. In Agent Studio, select **Phone Numbers** from the sidebar.

   ![Import phone number](https://assets-docs.agora.io/images/conversational-ai/studio/import-phone-number-1.png)

2. Locate the phone number you want to edit.

3. From the action menu, select **Edit**.

4. Update the phone number details as needed.

5. Click **Save** to apply your changes.

### Delete a phone number [#delete-a-phone-number]

To remove an imported phone number:

1. In Agent Studio, select **Phone Numbers** from the sidebar.
2. Locate the phone number you want to delete.
3. From the action menu, select **Delete**.
4. Confirm the deletion.

<CalloutContainer type="warning">
  <CalloutTitle>
    Caution
  </CalloutTitle>

  <CalloutDescription>
    Deleting a phone number removes it from all agents and campaigns that use it. Ensure no active inbound agents or outbound campaigns depend on this number before deleting.
  </CalloutDescription>
</CalloutContainer>

## Next steps [#next-steps]

* [Create a campaign](campaign): Use your imported phone numbers to create outbound calling campaigns
* [Deploy your agent](deploy-agent): Deploy agents to use in your campaigns
* [Handle inbound calls](inbound): Associate your number with an agent to answer inbound calls