Extended AT Commands Manual Page 56 of 70 2009-06-25
12.2. Basic AT Commands
The following table specifies the basic AT parameters to be supported for the data service.
Exceptions to EIA/TIA-602 are indicated by square brackets. Default settings are shown in bold.
12.2.1. Basic AT Parameters
Table 12.78 Basic AT parameters
Parameter Description
Packet
Data
STU-
III
E0
Do not echo command set in command state or online
command state.
O N/A
E1
Echo command set in command state or online command
state.
O N/A
L0 Low speaker volume. N/A N/A
L1 Low speaker volume. N/A N/A
L2 Med speaker volume. N/A N/A
L3 High speaker volume. N/A N/A
M0 Speaker off. N/A N/A
M1
Speaker on until carrier reported (support of this feature is
optional).
N/A N/A
Q0 Return result codes. R R
Q1 Do not return result codes. R N/A
V0 Display result codes as numbers. R R
V1 Display result codes as words. R R
X1
Enable additional result code CONNECT <rate>. Disable dial
tone and busy detection.
1
N/A N/A
X2
Enable additional result codes CONNECT <rate> and NO
DIALTONE. Disable busy detection. Enable dial tone
detection.
1
N/A N/A
X3
Enable additional result codes CONNECT <rate> and BUSY.
Enable busy detection. Disable dial tone detection.
1
N/A N/A
X4
Enable additional result codes CONNECT <rate>, BUSY
and NO DIALTONE. Enable busy and dial tone detection.
1
N/A N/A
Z0
Reset to default user configuration.
Note: ATZ with firmware R2.1.3 clears the +CSCA
settings. You have to enter the +CSCA values again to be
able to send SMS messages.
R N/A
&C0
Circuit 109 (CF) always ON.
R N/A
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