|Chapter 1:||The Hayes Standard AT Command Set|
|Chapter 2:||X.25 Communications|
|Appendix A:||Communications Options|
|Appendix B:||Troubleshooting Tips|
|Appendix C:||Modem-to-DTE Interface|
|Appendix D:||Application Suggestions|
You will also find additional discussions on some of the more complicated options, such as synchronous communications, and the interactions between communication standards, negotiation commands, and modem speeds. In addition, information about the connections between the modem and the computer or terminal is included.
With the information provided here, you should be able to configure your modem with AT commands for a variety of communication environments. If you are just starting out with communications programming, this reference should provide you with sufficient tips to address the modem's features through a software program of your own.
Chapter 1: The Hayes Standard AT Command Set
Provides definitions of the Hayes Standard AT Command Set including the commands, result codes, and S-registers.
Chapter 2: X.25 Communications
Includes definitions of the commands used for X.25 packet-switched communications, PAD and National Parameters, and command listings for four PAD profiles.
Appendix A: Communication Options
Describes the various asynchronous and synchronous transmission modes supported by Hayes modems and includes a discussion of the AT commands related to these modes.
Appendix B: Troubleshooting Tips
Provides special environmental considerations and offers suggestions for remedying problems in modem communications.
Appendix C: Modem-to-DTE Interface
Discusses the requirements and capabilities of the modem's data terminal equipment (DTE) interface.
Appendix D: Modem Application Development
Offers suggestions for developing applications software using AT commands.
Note: For the factory setting and available options/ranges for commands and registers, refer to the user documentation provided with your modem. Unless a command, register, or result code is listed in the user documentation, it is not supported by your modem, although it appears in this document.
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