***

id: 16678ddb-4b74-4e52-b93d-c220ffa11742
title: CallDevice.PhoneParams
slug: /dotnet/reference/calling/call-device-phone-params
max-toc-depth: 3
----------------

# SignalWire.Relay.Calling.CallDevice.PhoneParams

This object represents the parameters specific to a phone device.

## Constructor

The only constructor is the default constructor, properties should all be assigned by initializer or after construction.

**Parameters**

None

**Examples**

> Basic Example

```csharp
CallDevice device = new CallDevice
{
    Type = CallDevice.DeviceType.phone,
    Parameters = new CallDevice.PhoneParams
    {
        ToNumber = "+1XXXXXXXXXX",
        FromNumber = "+1YYYYYYYYYY",
    }
};
```

## Properties

| Property     | Type   | Description                                              |
| ------------ | ------ | -------------------------------------------------------- |
| `FromNumber` | string | The source phone number in E164 format.                  |
| `ToNumber`   | string | The destination phone number in E164 format.             |
| `Timeout`    | string | The maximum time in seconds to wait for a call to begin. |

## Methods

None

## Events

None