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This chapter provides an overview of the U916 PCI card and peripheral component

interconnect (PCI) cards in general. This chapter contains the following sections:

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•

Locating the PCI Cards

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Handling PCI Cards

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Cabling Speciﬁcations

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Hardware Requirements

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Software Requirements

U916 4-Port T1/E1 PCI Card

The U916 PCI card is a programmable communications adapter that connects up to

four T1/E1 ports in a DNCP Series 400/400-CO system.

The U916 PCI card supports high-speed communications over wide-area network

(WAN) T1 or E1 circuits. The T1/E1 standard deﬁnes a 1.544-megabits-per-second

(Mbps) transfer rate in North America and Japan and a 2.048-Mbps transfer rate in

Europe.

The U916 PCI card uses a 64-bit PCI bus architecture that optimizes data ﬂow between

the system and the network, resulting in the highest possible throughput with low CPU

utilization. The U916 PCI card supports the off-loading of real-time tasks from the

system processor and provides bus mastering across the PCI bus. In addition, the

U916 performs error checking and correction (ECC) for improved data accuracy.

Use of the U916 PCI card requires the prior installation of a T1/E1 line. Connection to

a T1 line also requires a channel service unit/data service unit (CSU/DSU). A

CSU/DSU is a network termination device that provides the physical and electrical

termination between the U916 PCI card and the network.

This guide assumes T1/E1 line(s) and one or more appropriate CSU/DSUs are

installed and conﬁgured at your site. The DNCP Series 400/400-CO system can

support up to eight U916 PCI cards, four in each card cage (32 total ports).

Chapter 1

Overview

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