HP General IO Connectivity manual Introduction

About the X.25 Product

Introduction

	Introduction
	The Hewlett-Packard X.25 link for HP 9000 systems provides
	networking link hardware and software to allow HP computer systems to
	communicate with other HP and non-HP computers over X.25 packet
	switching networks.
	The X.25 link implements the CCITT X.25 Recommendations and
	contains the components necessary to connect an HP 9000 to a public or
	private packet switching network conforming to the CCITT X.25
	Recommendation (1980, 1984 or 1988), or to another system in a
	back-to-back configuration.
	The information in this manual applies to HP 9000 Series 700 and 800
	systems that use single, dual, or quad-port communications hardware.
	Any differences are specifically noted.
NOTE	In a diskless cluster, X.25 software is only supported on the server
	system. It is not supported on client systems for this type of
	environment.

The following diagram illustrates the X.25 link architecture where:

•solid white boxes represent the product’s integral components.

•lightly shaded boxes represent the product’s protocol components.

•heavily shaded boxes represent optional components (external to the product) that can be added to the product.

Each component depends on the component(s) below it and must be installed and running in order to support higher-level components.

16 Chapter 1