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| 型号： | MT9234MU-CDC-CP |
| 厂商： | Multi-Tech Systems |
| 文件页数： | 6/66页 |
| 文件大小： | 0K |
| 描述： | MODEM V.92 DATA/FAX USB WORLD 25 |
| 标准包装： | 1 |
| 系列： | MultiMobile™ USB |
| 数据格式： | V.34，V.92 |
| 安装类型： | 台式 |
| 封装/外壳： | 3.1" L x 1.3" W x 1.0" H（80mm x 30mm x 25mm） |
| 包装： | 散装 |
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Chapter 1 – AT Commands, S-Registers, and Result Codes
Chapter 1 – AT Commands, S-
Registers, and Result Codes
Introduction
The AT commands are used to control the operation of your modem. They are called AT commands
because the characters AT must precede each command to get the AT tention of the modem.
AT commands can be issued only when the modem is in command mode or online command mode.
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The modem is in command mode whenever it is not connected to another modem.
The modem is in data mode whenever it is connected to another modem and ready to exchange
data. Online command mode is a temporary state in which you can issue commands to the
modem while connected to another modem.
To put the modem into online command mode from data mode , you must issue an escape
sequence ( +++AT ) and the command, e.g., +++ATH to hang up the modem. To return to data
mode from online command mode , you must issue the command ATO .
To send AT commands to the modem you must use a communications program, such as the
HyperTerminal applet in Windows or some other available terminal program. You can issue commands to
the modem either directly, by typing them in the terminal window of the communications program, or
indirectly, by configuring the operating system or communications program to send the commands
automatically. Fortunately, communications programs make daily operation of modems effortless by
hiding the commands from the user. Most users, therefore, need to use AT commands only when
reconfiguring the modem; e.g., to turn auto answer on or off.
The format for entering an AT command is AT Xn , where X is the command and n is the specific value for
the command, sometimes called the command parameter . The value is always a number. If the value is
zero, you can omit it from the command; thus, AT&W is equivalent to AT&W0 . Most commands have a
default value, which is the value that is set at the factory. The default values are shown in the “AT
Command Summary”.
You must press ENTER (it could be some other key depending on the terminal program) to send the
command to the modem. Any time the modem receives a command, it sends a response known as a
result code . The most common result codes are OK , ERROR , and the CONNECT messages that the
modem sends to the computer when it is connecting to another modem. See a table of valid result codes
at the end of this chapter.
You can issue several commands in one line, in what is called a command string . The command string
begins with AT and ends when you press ENTER. Spaces to separate the commands are optional; the
command interpreter ignores them. The most familiar command string is the initialization string , which is
used to configure the modem when it is turned on or reset, or when your communications software calls
another modem.
Note: This document applies to all the MT9234 products. However, some commands may not apply to all
MT9234 builds.
A Note About Fax Commands
Fax command s are covered in two separate fax reference guides. These guides are included on the
product CD and are posted on the Multi-Tech Web site:
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Fax Service Class 1 and Fax Service Class 1.0 Developer's Guide.
Document number: S000262x
Fax Developer's Guide for Classes 2 and 2.0/2.1
Document number: S000239x
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H)
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| MT9234MU-CDC-XR | 功能描述:MODEM V.92 DATA/FAX USB WORLD RoHS:是 类别:计算机，办公室 - 元件，配件 >> 调制解调器 系列:MultiMobile™ USB 标准包装:1 系列:MultiModem® ZBA 数据格式:V.34，V.92 波特率:- 电源电压:- 安装类型:台式 封装/外壳:5.7" L x 4.3" W x 1.0" H（145mm x 109mm x 25mm） 供应商设备封装:- 包装:散装 |
| MT9234MU-CDC-XR-CP | 制造商:Multi-Tech Systems 功能描述:V.92 DATA/FAX WORLD MODEM (USB) (25 MODEMS) - Bulk |
| MT9234SMI | 制造商:MULTI TECH SYSTEM 功能描述: |
| MT9234SMI-92 | 功能描述:拨号模块 V.92 Serial Data V.34 FAX - 5V RoHS:否 制造商:Multi-Tech Systems 产品:Data / Fax Modems 最大数据速率:56 kbps 存储类型:Flash 接口类型:Serial 工作电源电压:3.3 V 工作电源电流:95 mA 功耗:310 mW 最大工作温度:+ 70 C 尺寸:64.5 mm x 26.5 mm x 17 mm |
| MT9234SMI-92.R1 | 功能描述:拨号模块 V.92 Serial Data V.34 Fax 5V RoHS:否 制造商:Multi-Tech Systems 产品:Data / Fax Modems 最大数据速率:56 kbps 存储类型:Flash 接口类型:Serial 工作电源电压:3.3 V 工作电源电流:95 mA 功耗:310 mW 最大工作温度:+ 70 C 尺寸:64.5 mm x 26.5 mm x 17 mm |
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