internal/functions/Get-PhoneName.ps1

function Get-PhoneName {
    <#
    .SYNOPSIS
    Get Phone Name based off of DN
     
    .DESCRIPTION
    Get Phone Name based off of DN
     
    .PARAMETER DN
    Directory Number to get phone for
     
    .PARAMETER AXLVersion
    Version of AXL
     
    .PARAMETER server
    Server to query
     
    .PARAMETER Credential
    Credential to use for API access
     
    .PARAMETER EnableException
    Enable throwing of exception when API throws error.
 
    .EXAMPLE
    Get-PhoneName -DN 123 -Server 'CUCM-PUB.example.com' -Credential (Get-Credential)
 
    Get the Phone Name for Directory Number 123
    #>

    
    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true)]
        [string]
        $DN,
        [Parameter(Mandatory = $true)]
        [string]
        $server,
        [string]
        $AXLVersion = '11.5',
        [Parameter(Mandatory = $true)]
        [pscredential]
        $Credential
    )
    $CucmAxlSplat = @{
        'SqlQuery'   = @'
            SELECT device.name
            FROM
            device, numplan, devicenumplanmap
            WHERE
            devicenumplanmap.fkdevice = device.pkid
            AND
            devicenumplanmap.fknumplan = numplan.pkid
            AND
            numplan.dnorpattern = "{0}"
'@
 -f $DN
        'server'     = $server
        'Credential' = $Credential
        'AXLVersion' = $AXLVersion
    }
    Invoke-CucmSql @CucmAxlSplat
}