Telephony Services Application Programming Interface:

Telephony Services Applications Programming Interface (TSAPI) is defined as computer telephony integration (CTI) standard developed and promoted by Novell and AT&T. It consisted of a number of call control commands for switching calls, voice mail and call logging using Netware servers. Unlike the competing TAPI from Microsoft/Intel, TSAPI was a server-based system and did not expect clients to switch calls.

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