Norstar Computer Telephony Adapter (CTA) devices bridge the gap between phone systems and computers and are built on the Telephony Application Programming Interface (TAPI) standard developed by Microsoft, to work with a wide variety of CTI applications. Norstar offers several CTA options for basic, advanced or integrated desktop CTI. The Norstar Computer Telephony Adapter can be connected directly to a desktop PC and Norstar set. A single CTA device can be connected to the Norstar, enabling CTI and TAPI applications on any PC on the LAN. Automatically detects to which COM port the CTA device is connected, removing the need to set the correct COM port during installation.