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8
Allied Data Technologies
The modem can recognise data formats with 7-bit or 8-bit characters, with even, odd or no
parity bit and with one stopbit.
2.3
Overview of the AT commands
The modem responds to the following commands. In section 2.4, Explanation of the AT
commands, from page 10, the AT commands are described with the associated
parameters.
A/
Repeat last command
=x
Write to the selected S register
?
List contents of the selected S register
A
Answer
B
CCITT or RING
D
Dial
E
Echo
H
On hook/off hook
I
Identification
L
Loudspeaker volume
M
Loudspeaker (Monitor) control
N
Automatic line speed detection
O
On line data mode (Originate)
Q
Disable response (Quiet
S
Read/write S registers
T
Select tone dialling (DTMF)
V
Terse/verbose response
W
Extended response
X
Dial and busy tone recog responses
Y
Long space disconnect
Z
Reset and configure modem
'+++'
Escape code sequence
&C
Carrier Detect (DCD) status