AT Command Set
Preliminary
5
Order No. DM336P-002-01
Version : DM336P-AT-P04
PART I : Data COMMAND SET
General Command
A/
Repeat the last executed AT command
Do not precede A/ with AT or follow with ENTER.
AT
Attention Characters.
'AT' character pairs always at the beginning of each command line, except 'A/', which is to repeat the
last executed AT command.
Note: The following commands always have to precede with 'AT' attention character pair, if it is the first
command in the command
line.
A
Manually answer incoming call.
D
Dial (Originate a Call).
The following modifiers can be used in the dial string:
0-9,#,* Dialing digits. Touch Tone dial
characters.
P
Pulse dialing.
T
Touch Tone dialing.
W
Wait for second dial tone.
,
Pause (programmable by S8).
^
Enable 1300 Hz calling tone.
!
Flash (delay 500 ms).
;
Return to command mode.
DS=n
Dial stored number.
Dials one of three telephone numbers ( n =
0,1 or 2 ) which is stored in the modem's
nonvolatile memory via AT&Zn=x command.
En
Command Echo.
E0
Disables command echo.
E1*
Enables Command echo.
+++
Default Escape Character.
To switch from data mode to command mode, you can pause one second and type '+++'. Do not follow
with carriage return. The default ASCII character '+' is decimal 43. You can change register S2 to any
value from 0 to 255. Values greater than 127 disable the escape feature and prevent you from returning
to the Command Mode. Please refer to S2 and S12.
Hn
Hook control.
H0*
Modem is on-hook (disconnect from line).
H1
Modem is off-hook (connect to line).
In
Identification.
I0*
Display product-identification code.
I1
Factory set.
I2
Internal memory test.
I3
Firmware version 1.
I4
Firmware version 2.
