Voice API Programming Guide — June 2005 17
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1.Product Description
This chapter provides information on key voice library features and capability. The following
topics are covered:
•Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
•R4 API. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
•Call Progress Analysis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
•Tone Generation and Detection Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
•Dial Pulse Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
•Play and Record Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
•Send and Receive FSK Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
•Caller ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
•R2/MF Signaling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
•TDM Bus Routing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
1.1 Overview
The voice software provides a high-level interface to Intel telecom media processing boards and is
a building block for creating computer telephony applications. It offers a comprehensive set of
features such as dual-tone multifrequency (DTMF) detection, tone signaling, call progress analysis,
playing and recording that supports a number of encoding methods, and much more.
The voice software consists of a C language library of functions, device drivers, and firmware.
The voice library is well integrated with other technology libraries provided by Intel such as fax,
conferencing, and continuous speech processing. This architecture enables you to add new
capability to your voice application over time.
For a list of voice features by product, see the Release Guide for your system release.
1.2 R4 API
The term R4 API (“System Software Release 4 Application Programming Interface”) describes the
direct interface used for creating computer telephony application programs. The R4 API is a rich
set of proprietary APIs for building computer telephony applications on Intel telecom products.
These APIs encompass technologies that include voice, conferencing, fax, and speech. This
document describes the voice API.