Short description of One4000IP 2.4.0: One4000IP is more than a Netphone. Take advantage of free broadband VoIP calling with premium voice quality as well as super low worldwide rates to regular phones. Call to any PC with a SIP net phone/ soft phone. Import to your Contact list from Outlook. Call by clicking in the Contact list and you are connected in seconds. Also available is a free software program, One4000Mobile, for download to your mobile.