HP X.25/9000 User's Guide HP-UX 11i v3 (5900-1523, August 2011)

1 About the X.25 product
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.
Introduction 7