1.1 Global Call Software Overview

Global Call development software provides a common signaling interface for network-enabled applications, regardless of the signaling protocol needed to connect to the local telephone network. The signaling interface provided by Global Call software facilitates the exchange of call control messages between the telephone network and virtually any network-enabled application. Global Call software enables developers to create applications that can work with signaling systems worldwide, regardless of the network to which the applications are connected. Global Call software is ideal for high-density, network-enabled solutions, such as voice, data, and video applications, where the supported hardware and signaling technology can vary widely from country to country.

As an example, the signal acknowledgement or information flow required to establish a call may vary from country to country. Rather than requiring the application to handle low-level details, Global Call software offers a consistent, high-level interface to the user and handles each country's unique protocol requirements transparently to the application.

The Global Call software comprises three major components:

Global Call Application Programming Interface (API)

A common, extensible API providing network interfaces to higher levels of software. Application developers use API function calls in their computer telephony applications. Intel® Dialogic® recommends the Global Call API as the preferred call control interface.

Call Control Libraries

A set of libraries that provide the interface between the Global Call API and the various network signaling protocols.

Global Call Protocols

Network signaling protocols, such as T-1 Robbed Bit, E-1 CAS, ISDN, Analog, QSIG, SS7, and IP H.323 and SIP can be invoked by the Global Call API to facilitate call control.

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