HP X.25/9000 Programmer's Guide

10 Chapter2

X.25 Addressing

Introduction

This chapter discusses the issues associated with addressing over an

X.25 interface. Addressing is used to deﬁne the particular interface and

application that is used during a Switched Virtual Circuit (SVC)

connection.

NOTE The information in this chapter applies only to SVCs. It does not apply to

Permanent Virtual Circuits (PVCs).

Issues discussed in this chapter include:

• Levels of addressing

• Preparing addressing variables

• Addressing options for clients

• Addressing options for servers

• Call-matching by X.25 interface name

• Call-matching by called X.121 address only

• Call-matching by subaddress

• Call-matching by protocol ID

• Using wildcard addressing

• Address space conﬂicts

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