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Chapter 1: Introduction
iSPAN PRI PCI ISDN Users Guide 5
• 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