> ## 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.

# The Number Element

> Use the Number XML element on Vobiz to specify a phone number to dial inside a Dial verb - supports multiple Number children for parallel dialing.

You can use the Number element to specify a phone number to dial.

You can use multiple Number elements within a Dial element to simultaneously call multiple numbers. The first call to pick up is connected to the current call and the rest are hung up.

Use the Number element to

* Forward an incoming call on a Vobiz number to a mobile or a landline number.

  * Make an outbound call to an agent and then bridge the call to a client's number for call center use cases.

  * Enable click to call, where you input a number on a web-based form and request a connection with another person.

**Note:** When dialing multiple numbers simultaneously, if confirmSound and confirmKey are specified for the Dial element, the number that confirms the key correctly is bridged and all others fail.

## Attributes

**`sendDigits`** *(string)*

Tells the API to play DTMF tones when the call is answered. This is useful when dialing a phone number and an extension. The API dials the number, and when the automated system picks up, it sends DTMF tones to connect to the extension.

**Allowed values:** any digits and the w character. Each w character tells the Vobiz API to wait 0.5 seconds.

No default value.

**`sendOnPreanswer`** *(boolean)*
If set to true, sendDigits is executed when the called party is in early media instead of answer state.

**Allowed values:** true, false

Defaults to false.

## Setting the caller ID

The caller ID shown to the dialed number is controlled by the **`callerId`** attribute on the parent [`Dial`](/xml/dial) element - not on `Number` itself. Set it to override the number displayed to the called party (for example, to present your own Vobiz number when forwarding or transferring a call):

```xml theme={null}
<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Speak>Please hold while we transfer your call.</Speak>
    <Dial callerId="+14155551234">
        <Number>+14156667890</Number>
    </Dial>
</Response>
```

If `callerId` is omitted, the current caller's caller ID is used by default. See [Transfer a Call](/call/transfer-call) for a full walkthrough of using the `Dial` element to transfer and forward calls.

## Dialing extensions

This code dials the extension 2410 at the number 15671234567. The Number element describes the phone number and gives it the sendDigits attribute. To dial the extension a couple of seconds after the number is dialed, we add a few leading w characters, telling Vobiz to wait 0.5 seconds for each w.

### Response

```xml theme={null}
<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Dial>
      <Number sendDigits="wwww2410">15671234567</Number>
    </Dial>
</Response>
```