Boca FDSP34AI, Installation Manual

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On-Line EXPRESS
Appendix D: AT Command Reference
Command/Protocol Overview
In most cases, your communications software will set and control the
operation of your modem. Following is a brief survey of the most
commonly used Hayes-compatible AT commands for use with your
modem. In addition, we’ve also provided information on extended AT
command sets, S-Registers, and commands and registers for high-level
protocols such as MNP, V.42/V.42bis, and V.32/V.32bis. It will rarely be
necessary to use ‘AT’ commands and S-Registers in command mode. We
include them here for more advanced users who may prefer command
mode operation, or require special settings. See pages 44-60 for
additional details.
Hayes-compatible commands consist of a basic command set and an
extended command set. The basic set involves functions such as dialing a
number, or putting the modem on-hook (i.e., replacing the telephone
handset).
Extended commands allow more sophisticated control of the modem
such as transmission speed, or initiating high-level functions like data
compression or error correction. These functions are defined and
controlled by the available protocols mentioned above. A protocol is a set
of standards by which data communications operate.
Every AT command includes an “AT” prefix, followed immediately by
the command and, in many cases, additional parameters. Multiple
commands can be entered at the same time from your communications
software.
AT Command[parameter) [parameter] ...
PRESS ENTER
Example: ATH or ATH0 tells the modem to disconnect