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8.2 AT Commands MIM-A01
8.2.1 Overview of AT Commands
Commands can be entered alone or in strings, and they must be preceded - except the A/ com
-
mand -by thecharacter sequence AT(or at) andended withthe contentof theS3 register, which
usually is <CR/LF>. For example:
ATX1<CRLF>
ATQ0<CRLF>
The maximum length of a command line is 80 characters. If more commands are issued, the
modem responds with an error message. The commands can be sent with or without spaces
between commands and in upper-case or lower-case letters.The following commands produce
the same results:
ATX1QODP12345<CRLF>
At X1 Q0 Dp 12345<CRLF>
Use the Backspace key to delete errors.
In this summary and the following descriptions, the preceding AT sequence is not listed.
Appendix AT Commands MIM-A01
Mitsubishi Industrial Modem 8-9
Command Description
A Answer mode
A/ Repeat last command
B Select ITU-T or Bell
D Dial command
E Command mode echo
H Switch hook control
I Identification/checksum option
L Speaker volume control
M Speaker control
N Select data rate handshake
O Go online
P Select pulse dialing
Q Result code display control
S Select an S register
T Select tone dialing
+TFORMAT Data format at the serial interface
+TBAUD Baud rate of the serial interface
V Result code form
W Response code data rate
X Result code type
Z Recall stored profile
+++ Escape Sequence to return temporarily to Command mode
&C DCD (data carrier detect) option
&D DTR (data terminal ready) option
&F Load factory defaults
&G Guard tone option (1200 bps and 2400 bps only)
&K Select serial port flow control
&P Dial pulse ratio
&S DSR (data set ready) option
&U Disable Trellis coding
&V View active and stored profiles
&W Store active profile
&Y Select stored profile on power-up
Tab. 8-22: Overview of AT Commands (1)