Boca Bocamodem M144EW, Руководство пользователя, Страница: 33 / 84

33
Appendix A: 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 (i.e., the DOS prompt). We
include them here for more advanced users who may
prefer command mode operation, or require special
settings. See pages 51-71 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.
AT Command[parameter) [parameter] ...
PRESS ENTER
Command/Protocol Reference