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

# Refer

The `<Refer>` verb in Telnyx allows you to transfer a phone call to another SIP infrastructure during a TeXML call. You can initiate it at any point during the call. When you use the `<Refer>` verb, Telnyx will replace the original call with a new call to the external system you specify, effectively transferring the call to that system.

## Attributes

<table>
  <thead>
    <tr>
      <th>ATTRIBUTE</th>
      <th>DESCRIPTION</th>
      <th>OPTIONS</th>
      <th>DEFAULT</th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <td><code>action</code></td>
      <td> Optional URL where TeXML will make a request when the Refer verb ends, to retrieve a new set of TeXML instructions to continue the call flow. </td>

      <td />

      <td>-</td>
    </tr>

    <tr>
      <td><code>method</code></td>
      <td> HTTP request type used to retrieve the next set of instructions. </td>
      <td><code>GET</code>, <code>POST</code></td>
      <td><code>POST</code></td>
    </tr>
  </tbody>
</table>

## Examples

```xml theme={null}
<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Refer>
        <Sip>sip:john@example.com</Sip>
    </Refer>
</Response>
```

## Expected callbacks

If `action` is set, a callback is sent when the `<Refer>` verb finishes. See [Refer Status Callback](/api-reference/callbacks/texml-refer-status) for the full payload reference.