Chapter 1: Introduction

CSU (Channel Service Unit)

(For more information, see North America T1/PRI Line on page 17).

Software Drivers

You can install only one iSPAN-PRI PCI ISDN adapter per system. Each adapter requires the following drivers:

WAN adapter driver for Windows NT: the basic driver required to support the adapter

RAS Support: the driver required to support Microsoft Remote Access Service over ISDN. Enables the transport of TCP/IP, IPX/SPX, and NetBEUI protocols over ISDN lines.

These drivers are both installed during the installation procedure.

The general software architecture is as follows:

Figure 1-3. Software Architecture Overview

iSPAN PRI PCI ISDN Users Guide

5