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| 型号： | CC-2401K2A-CS |
| 厂商： | Copeland Communications Inc |
| 文件页数： | 8/66页 |
| 文件大小： | 0K |
| 描述： | MODEM 2400BAUD SECURE 3.3V |
| 标准包装： | 30 |
| 数据格式： | V.21，V.22，V.23，Bell 103 |
| 波特率： | 2.4k |
| 电源电压： | 3 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 模块 |
| 包装： | 散装 |
| 配用： | 539-1002-ND - KIT EVALUATION WORLD MODEM II |
| 其它名称： | 539-1010 CC-2401K2A-CS-ND |
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Data Sheet
CC-2401K2
Page 16 of 66
2007, Copeland Communications, Inc.
CC-2401K2 Datasheet Rev 1.5
AT Command Set
The CC-2401 provides several vital functions including AT command parsing, DAA control, connect sequence
control, DCE protocol control, intrusion detection, parallel phone off-hook detection, escape control, caller ID
control and formatting, ring detect, DTMF control, call progress monitoring, and HDLC framing. The controller
uses AT (Attention) commands and S-Registers to configure and control the modem.
The modem has two modes of operation: Command mode and data mode. The CC-2401 is asynchronous in
both modes. At power up, after a reset, before a connection to another modem is made, after a connection is
dropped (hang up or lost) and during an escape sequence out of data mode (ESC pin, “+++” or other break),
the modem is in command mode.
The CC-2401 supports a subset of the typical modem AT command set since it is intended for use with a
dedicated microcontroller instead of general terminal applications. AT commands begin with the letters “AT”
and are followed directly (no space) by the command. All commands are case sensitive. All AT commands
must be entered in upper case including AT. The exceptions are w, r, m, q and z (wakeup on ring).
AT commands can be divided into two groups: Control commands and configuration commands. Control
commands, such as ATD, cause the modem to perform an action. The value of this type of command is
changed at a particular time to perform a particular action.
Configuration commands change modem characteristics until they are modified or reversed by a subsequent
configuration command or the modem is reset. Modem configuration status can be determined with the use of
“ATSR?” (followed by a carriage return), where “R” is the two character hexadecimal address of an S-register.
A command line is defined as a string of characters starting with “AT” and ending with an end of line character
<CR> (13 decimal). Command lines may contain several commands one after the other. If there are no
characters between “AT” and <CR>, the modem responds with a “O” after the carriage return.
Command Line Execution
The characters in a command line are executed one at a time. Unexpected command characters are ignored,
but unexpected data characters may be interpreted incorrectly.
After the modem has executed a command line, the result code corresponding to the last command executed
is returned to the terminal or host. To echo command line characters, set the CC-2401 to echo mode using
the E1 command.
All numeric arguments, including the address and value of an S-register, are in
hexadecimal format and two digits must always be entered.
<CR> End Of Line Character
This character is typed to end a command line. The value of the <CR> character is 13 decimal (the ASCII
carriage return character). When the modem detects the carriage return, it executes the commands in the
command line.
Note: Commands that do not require a response are executed immediately and do not need a <CR>.
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