TAPI（Telephony Application Programming Interface）全名电话应用程序化接口，是微软所提供的应用程序接口，用于传统电话拨接的功能。TAPI可用于控制调制解调器（modem），甚至是用户交换机（PBX）。

一些厂商提供的驱动程序可以控制多组handsets.传统上称之为"third-party control".还有一些厂商的驱动程序只能允许控制单一组handset.可称之为"first-party control".电话系统很自然的允许瞬间多点连接.调制解调器（modem）的连接只能是first-party.

The Telephony Application Programming Interface (TAPI) is a Microsoft Windows API, which provides computer telephony integration and enables PCs running Microsoft Windows to use telephone services. Different versions of TAPI are available on different versions of Windows. TAPI allows applications to control telephony functions between a computer and telephone network for data, fax, and voice calls. It includes basic functions, such as dialing, answering, and hanging up a call. It also supports supplementary functions, such as hold, transfer, conference, and call park found in PBX, ISDN, and other telephone systems.