# Dialogic® NaturalAccess™ Voice Control Element API Developer's Manual

The Dialogic® NaturalAccess™ Voice Control Element API Developer's Manual provides:

- An overview of the Voice Message service

- A reference to functions, errors, events, and reasons

This manual defines telephony terms where applicable, but assumes that you are familiar with telephony concepts. It also assumes that you are familiar with the C programming language.

Read the Dialogic® NaturalAccess™ Software Developer’s Manual before using this manual. The Dialogic® NaturalAccess™ Software Developer’s Manual contains detailed information on Natural Access concepts, architecture, and application development. This information must be fully understood before you develop a voice application using Natural Access.

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