The Dterm SP30 optimally delivers high quality voice via a USB-connected headset or via a PC sound card, microphone and speakers. With a simple drag and drop, the Dterm SP30 allows telephone dialing from other telephone directory applications such as Microsoft Outlook®, Microsoft Word documents, etc. In addition, the Dterm SP30 provides an interface to Microsoft's Telephony Application Programming Interface (TAPI), allowing TAPI-enabled applications, such as Outlook and ACT!®, to make and receive calls.