Table of Contents
Advertisement
6
AT Command Set Summaries
Basic AT Command Set
Command
Options Function & Description
A/
<any key>
+++
All the Following Commands Require a "AT" Prefix
A
Bn
B0 *
B1
D s
0-9, #, *
P
T
,
;
!
@
R
W
DL
DS n
n=0-3
E n
E0
E1 *
H n
H0 *
H1
I n
I0
I1
I2
L n
n=0-7
4 *
M n
M0
M1 *
M2
30 AT Command Set Summaries
Re-execute the last command once
Terminate current connection attempt when enter in
handshaking state.
Escape sequence code, entered in data state, wait for
modem to return to command state.
Go on-line in answer mode. (See also S39.2, S43.6)
Handshake option
Select CCITT V.22 for 1200 bps
Select Bell 212A for 1200 bps communication
Dial s (numbers and options) that follow (see also S38.0,
S35.4). The options of s are listed as follows:
Digits for dialing
Pulse dialing
Ton dialing
Pause for a time specified in S8. Remaining digits will be
dialed as in-band DTMF.
Return to command state after dialing
Hook flash
Wait for a 5 second silence before proceeding
Reverse handshake (go on-line in Answer mode)
Wait for second dial tone. Remaining digits will be dialed
as in-band DTMF
Repeat last ATD command
Dial number stored in non-volatile RAM at location 'n'
Command mode local echo of keyboard commands
Echo off
Echo on
On/off hook control
Hang up (on-hook) the modem or ISDN, same as 'ATH'
Off hook the modem
Display inquired information
Display numerical product code, same as 'ATI'
Display product information and ROM checksum
Display modem link status report
Speaker volume control. The higher the value, the higher
the volume
Speaker control
Speaker always OFF
Speaker OFF during dialing
Speaker always ON
Ref.
Advertisement
Table of Contents
