X25AM Programming Manual

Hewlett-Packard Company—527201-001
i
X25AM Programming Manual
Glossary Index Examples Figures Tables
What’s New in This Manual xi
Manual Information xi
New and Changed Information xi
About This Manual xiii
Who Should Use This Manual xiii
How This Manual is Organized xiii
Related Manuals xiv
Notation Conventions xiv
1. Introduction
About the X25AM Process 1-1
Subdevices 1-1
Application Protocols 1-2
Other X25AM Protocols 1-2
Call Setup, Data Transfer, and Call Clearing 1-2
Port Numbers and Subaddressing 1-3
Assigning Incoming Calls 1-5
Call Setup and Call Clearing Packets 1-6
Types of Packets
1-6
Call User Data (CUD) in Call Setup Packets
1-7
Incoming Call Packet 1-10
Call Accepted Packet 1-11
Call Request Packet 1-12
Call Connected Packet 1-12
Clear Indication Packet 1-13
DTE Clear Confirmation Packet 1-13
Clear Request Packet 1-13
DCE Clear Confirmation Packet 1-13
Restart, Clear, and Reset Cause and Diagnostic Packets 1-13
Subscription Parameters 1-13
Frame-Layer Subscription Parameters 1-14