add-myphone.ps1

function Add-MyPhone {
    [CmdletBinding(SupportsShouldProcess, ConfirmImpact = 'Low')]
    param (
        [Parameter(Mandatory = $true)]
        [string]
        $PhoneName,
        [Parameter(Mandatory = $true)]
        [ValidateSet('Cisco 6941', 'Cisco 7841', 'Cisco 7942')]
        [string]
        $Product,
        [Parameter(Mandatory = $true)]
        [string]
        $DevicePoolName,
        [Parameter(Mandatory = $true)]
        [string]
        $Protocol
    )
    $PhoneSplat = @{
        Server                = 'MyServer'
        Credential            = [System.Management.Automation.PSCredential]::new('user', (ConvertTo-SecureString -String 'password' -AsPlainText -Force))
        AXLVersion            = '11.5'
        MacAddress            = $PhoneName
        Product               = $Product
        ProtocolSide          = 'User'
        devicePoolName        = $DevicePoolName
        commonPhoneConfigName = 'Standard Common Phone Profile'
        phoneTemplateName     = "Standard $($product.split(' ')[1]) $Protocol"
        Protocol = $Protocol
    }
    Add-Phone @PhoneSplat
}