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12.5 Sending AT Commands
AT commands are short text strings that can be sent to the modem to set, remove and query modem's configuration
parameters. BlueVue Device Manager is a software application that provides a graphical user interface designed to avoid
manual entry of AT commands. However, not all configuration commands are available in BlueVue. Additionally, BVDM
is only available in Microsoft Windows operating systems. For these and various other reasons, some users may want to
send AT commands to the modem.
The full list of AT commands and their description is in the
AT Command Reference manual, available at
www.redlion.net .
IMPORTANT:
After sending AT commands to configure the modem, you must send AT&W to save the changes. Otherwise, they will be
lost the next time the modem resets. You do not need to send AT&W after each command: you can send it just once after
you’re done configuring the modem.
Note:
AT commands must end with a Carriage Return character. If you are not using a Windows operating system, you may have
to configure your terminal emulator software or telnet client software to end lines with a Carriage Return (0x0D or \r).
12.5.1 Sending AT commands over an IP connection
If you can reach the modem using a crossover Ethernet cable, or a USB cable, or remotely to the modem's WAN IP, AT
commands can be sent by performing a TCP (telnet) connection to the modem on port 6070. Here is an easy way to do
this
in Windows:
1) Click the Start button, then Run .
2) In the Run window, type command and click OK. A command prompt window will open.
3) Type telnet xxx.xxx.xxx.xxx 6070 (replacing the x’s with the modem’s IP) and press Enter . By default, the modem's
IP will be 192.168.0.1 for Ethernet, and 192.168.111.1 for USB. If connecting to a remote modem, you will need to
know its WAN IP.
4) If the modem is password protected, you will have to enter its password.
5) You should get a "Welcome to BlueTree Wireless" message. You can now send AT commands .
12.5.2 Sending AT commands over a serial connection
If connected to the modem using a straight DB9 serial cable, AT commands can be sent using a terminal emulation
software. The terminal and the modem must be using identical serial port settings to communicate. By default, the
modem uses 115200 bps, 8 data bits, no parity, 1 stop bit, and hardware flow control. Below is an example for
connecting to a modem with default serial port settings.
1) Open HyperTerminal . To do so, click the Start button and then click on Run . In the Run window, enter hypertrm
and click OK.
2) On the Connection Description screen , enter any name , select any icon, and then click OK.