25
AT command
AT commands are commands for setting FOMA terminal functions using a PC. FOMA
terminals comply with AT commands and support some extended commands and
proprietary AT commands.
❖
AT command input format
"AT" must be entered before each AT command. Commands must be entered in one-byte alphanumeric
characters.
<Example> Connecting to mopera U with ATD command
AT commands and their parameters must be entered on a single line. All the characters from the first
character until the character directly preceding
must be entered on a single line. Each line can be up to
256 characters including "AT".
❖
AT command input mode
To operate FOMA terminal using AT commands, a PC must be in terminal mode. Terminal mode is a mode
that lets the PC operate as a single communication terminal. When terminal mode is set, the characters
entered from the keyboard are sent directly to the communication port to operate FOMA terminal.
･
Offline mode
FOMA terminal is in stand-by. FOMA terminal must be in stand-by status to use AT commands to control
it.
･
Online data mode
FOMA terminal is communicating. If you enter AT commands when FOMA terminal is performing
communication, the sent characters are sent directly to the communication receiver and may cause the
receiver's modem to malfunction. Do not enter AT commands while FOMA terminal is performing
communication.
･
Online command mode
AT commands can be used even when FOMA terminal is in communication mode. These operations
make it possible to execute AT commands without interfering with the connection to the communication
receiver, and normal communication can continue after the commands have finished executing.
Switching between online data mode and online command mode
To switch FOMA terminal from online data mode to online command mode, you can use either of the
following procedures.
･
Enter +++ command or code set in the S2 register.
･
Turn the RS-232C
*
ER signal OFF when set in "AT&D1".
*
The USB interface emulates an RS-232C signal line so RS-232C signal control using communication applications is
possible.
To switch from online command mode to online data mode, enter "ATO
".
✔
INFORMATION
･
When making a call or sending an AT command from external device, it is sent from Number A with 2in1 in Dual
mode or A mode, and from Number B in B mode.
ATD
＊
99
＊＊＊
3
#
Return character : Press Enter key. (Command separator)
Parameter : Command's argument
Command : Command name
