The UCX TAPI Service Provider application is a driver that enables the Microsoft TAPI to communicate with the UCX communication server.  Once installed on a Microsoft Windows PC, a user can initiate outbound calls and hang up calls using Microsoft Outlook, Microsoft Dialer or any TAPI compatible application. The optional UCX TAPI application also supports receiving inbound calls with basic caller information on incoming calls so that some TAPI aware applications can use this information to do screen-popup, displaying caller information on the screen. 

The Microsoft Outlook does not have any built-in support for screen-popping and this functionality can be achieved with Windows programs such as IdentaPop Pro TAPI Outlook Screen Pops or Resource Software International Limited Visual Rapport desktop software. The TAPI Call Monitor can also be used for handling call controls on the incoming call scenario. The TAPI Call Monitor displays the incoming calls and upon selecting the call, the call control buttons gets enabled (e.g. Answer, Hold, Drop etc.).