2. to Dialogic ISDN Products

Introduction

The Integrated Services Digital Network (ISDN) is a collection of internationally accepted standards for defining interfaces and operation of digital switching equipment for the transmission of voice, data, and signaling. ISDN has the following characteristics and advantages:

• ISDN makes all transmission circuits end-to-end digital.
• ISDN adopts a standard out-of-band signaling system.
• ISDN brings significantly more bandwidth to the desktop.

The Dialogic ISDN products provide telecommunication applications access to the many features and benefits of ISDN. The Dialogic ISDN product line consists of the Dialogic ISDN firmware and the Dialogic ISDN software library. The Dialogic ISDN firmware and software work with the supported Dialogic boards to provide a network interface using the following ISDN technologies:

• Basic Rate Interface (BRI), which allows the transfer of both voice and data over standard 64 Kbps lines. A BRI line consists of two 64 Kbps channels for a total of 128 Kbps.
• Primary Rate Interface (PRI), which allows the transfer of voice and data over T-1 (1.544 Mbps) or E-1 (2.048 Mbps) lines.

This chapter describes the features and benefits of BRI and PRI and lists typical applications for each. This chapter also provides a list of currently supported BRI and PRI protocols and a list of Dialogic boards that can be used for BRI and PRI.

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