This module is not intended as a reference manual. The reason why this module sticks with the original Hayes command set is to have a defined boundary. If you have no firsthand experience that something is done the same way on 'almost' all Hayes-compatible modems, then leave it out, or mark it at least as doubtful. Do not assume that just because something works on your particular modem it is the standard and other modems do it the same way.

If you really want to see your particular love-child covered, provide an Appendix with that vendor-/brand-specific information. This module deals with generic Hayes modems, not with any vendor-specific extensions.The Programming Serial Data Communications book provides other modules for such information. This module is operating-system–agnostic.This module is not a dumping ground for random modem programming information and folklore.This section particularly addresses potential authors. The module then continues with a description of the basics of modem programming, including the set-up of a development environment.įurther, the module provides detailed (but incomplete) programming information, and an incomplete reference of the original Hayes command set and registers.Īdministrative Information It also includes some principal information about what a modem is, and how the signaling with a modem happens. The module explains the origin of the term Hayes, and the related AT commands. Vendor specific extensions are not covered, and do not belong into this module. The original Hayes modem command set is exclusively used as a reference in this module. Often this is done via a wireless phone system, where the wireless module still provides a Hayes-compatible interface for dialing and data transmission. For example, embedded modems in machines are used to automatically 'call home' to the manufacturer in case the machine is in need of some service. In recent times, modems can be found in new areas where they were previously not seen. Nevertheless, modems are used for many applications.

Modem programming is slowly becoming a lost art, particularly with the widespread migration of users from dial-up lines to DSL for very obvious performance reasons. Such types of modems are the norm in consumer applications, as well as many professional applications - basically, wherever modems are still used. It covers the programming of Hayes and Hayes-compatible telephone modems. This content is part of the Serial Programming book.

7.3 Special Commands and Character Sequences.

2.6 Welcome to the World of State-Machines.

2.3 Operating System, Programming Language & Communication Basics.

2.2 Setting up a Development Environment.

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