$result = $soap->checkConnectivity(
        array('checkConnectivityRequest' =>
            array(
                'requestType' => 'SITE',
                'requestMode' => array(
                    'siteAddress' => array(
                        'postalZipCode'     => $this->postcode,
                        'connectivityType' => 'COLT FIBRE',
                    ),


                )
            )
        )
        );