# Dialogic® NaturalAccess™ ISDN Software Developer's Manual

The Dialogic® NaturalAccess™ ISDN Software Developer's Manual explains how to develop an ISDN-based telephony application using NaturalAccess™ ISDN for NCC API software. It concentrates on building ISDN for NCC API applications that perform call control using the NaturalAccess NaturalCallControl API (NCC API). For information on building applications that interface with the ISDN Software protocol stack at lower layers, see the Dialogic® NaturalAccess™ ISDN Messaging API Developer's Manual.

This document targets developers of telephony and voice applications who are using NaturalAccess. It defines telephony terms where applicable, but assumes that the reader is familiar with basic telephony concepts. It also assumes that the user is familiar with the C programming language.

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