Foma D902iS, Manual

Page: 510 / 517

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.
About the AT command
■ AT command input format
“AT” must be entered before each AT command.
Commands must be entered in one-byte
alphanumeric characters. An input example is as
follows:
AT commands and their parameters (numbers or
symbols) must be entered on a single line. Enter
all the characters from the first character to the
character just before in a single line. Up to
160 characters (including “AT”) can be entered in
each line.
■
AT command input mode
To operate FOMA terminal using AT commands,
the PC must be in the terminal mode.
Terminal mode is a mode that lets the PC operate
as a single communication terminal. Characters
entered from the keyboard are sent to the device
or line connected to the communication port.
･
Offline mode
FOMA terminal in standby status. Usually,
FOMA terminal must be in this status to use AT
commands to control it.
･
Online data mode
FOMA terminal is in the communication mode. If
you enter AT commands when FOMA terminal
is performing communication, the received
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 allow you to operate FOMA
terminal even when FOMA terminal is in the
communication mode. These operations make it
possible to execute AT commands without
interfering with the connection to the
communication receiver, and normal
communication can be continued after the
commands have finished executing.
Switching between the online data mode and
online command mode
To switch FOMA terminal from the online data mode
to online command mode, you can use either of the
following procedures:
･
Enter the “
+++
” command or the code set in the
“S2” register.
･
Turn the RS-232C*
1
ER signal off when set in
“AT&D1”.
To switch from the online command mode to online
data mode, enter “ATO ”.
*1 The USB interface emulates an RS-232C signal line,
so RS-232C signal control using communication
applications is possible.
ATD ＊ 99 ＊＊＊ 3#
Press Enter key. Parameter
Command