001-0003-819 Rev 1
Page 37 of 48
Table 10.1: Result Codes
Digit Verbose
Description
0
OK
Command executed without errors
1
CONNECT
Connected to remote modem
2 RING
Incoming
Call
3
NO CARRIER
Carrier from remote modem lost or never present
4
ERROR
Error in the command line
6
NO DIAL
No dial tone detected within time out period
7 BUSY
Busy
signal
detected
8 NO
ANSWER Five seconds of silence not detected after ring back when @ dial
modifier is used
Basic AT Parameters
Basic AT commands control the basic configuration of the modem. The parameters can only be read
back by the AT&V command when in command state. Table 10.2 shows the command format.
Table 10.2: Basic AT Parameters
Parameter Description
E0
Do not echo commands in command state or in online state
E1
Echo commands in command state or in online state
I
Displays the product name
I2
Displays the product name and firmware revision number.
Q0
Return result codes
Q1
Do not return result codes
V0
Display result codes as numbers
V1
Display result codes as words
X0
Enable additional result code CONNECT. Disable dial tone and busy
detection
X1
Enable additional result code CONNECT <rate>. Disable dial tone and busy
detection
Z
Reset modem NV memory and reboot
&C0
Carrier Detect (CD) always ON
&C1
CD on/off in accordance with the network connection status
&C2
CD always on; Winks on channel disconnect
&D0
Ignore Data Terminal Ready (DTR)
&D1
Enter Online Command state following ON-to-OFF transition of DTR
&D2
Enter Command state following ON-to-OFF transition of DTR
&F
Reset all modem parameters to default
&V
Dump current configuration parameters
&Vn
Dump current configuration parameters of profile n
&Wn
Saves settings to persistent storage
S-Registers
The value of an S-Register may be set by the following command line syntax:
ATSn=xxx
where n is the register number and xxx is a decimal value. For instance, to set the register S0 to 3,
the command ATS0=3 would be used. Table 10.3 describes some of the more commonly used S-
Registers.