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Comandos AT para Modem

Function

Command

Syntax

U.S. Default

Escape to online command mode (not preceded by AT) +++ +++  
Pause (not preceded by AT) / / 125 ms
Answer manually A ATA  
Repeat last command (not preceded by AT) A/ A/  
Dial. D ATD  
n    Phone #, 0 through 9      
T    Tone dial DT ATDTn  
P    Pulse dial DP ATDPn  
R    Call an originate-only modem DR ATDR  
W    Wait for second dial tone (X2, X4) DTnWn ATDTnWn  
@    Wait for answer (X3, X4) DTWn@ ATDTWn@  
,    Pause in dialing (S8) DTn,n ATDTn,n 2 secs
!    Flash switch hook DTn!n ATDTn!n  
#    Auxiliary tone dial digit DTn#n ATDTn#n  
*    Auxiliary tone dial digit DTn*n ATDTn*n  
;    Stay in command mode after dialing DTn;n ATDTn;n  
$    Wait for credit card bong DTn$n ATDTn$n  
&    Wait for credit card bong DTn&n ATDTn&n  
"    Set quote mode for the following: DTn"n ATDTn"n  
A         Dial 2
B         Dial 2
C         Dial 2
D         Dial 3
E          Dial 3
F          Dial 3
G         Dial 4
H         Dial 4
I           Dial 4
J          Dial 5
K         Dial 5
L          Dial 5
M        Dial 6
N         Dial 6
O         Dial 6
P          Dial 7
R         Dial 7
S          Dial 7
T          Dial 8
U         Dial 8
V         Dial 8
W        Dial 9
X         Dial 9
Y         Dial 9
     
Display a list of dial commands D$ ATD$  
Redial last number DL ATDL  
Display last dialed number DL? ATDL?  
Dial stored number DSn ATDSn  
Turn command echo off E0 ATE0 No
Turn command echo on E1 ATE1 Yes
Turn online echo on F0 ATF0 No
Turn online echo off F1 ATF1 Yes
Hang up (go on-hook) H0 ATH0  
Pick up (go off-hook) H1 ATH1  
Display the 4-digit product code I0 ATI0  
Display the checksum I1 ATI1  
Display the RAM test results I2 ATI2  
Display the firmware version I3 ATI3  
Display the current modem settings I4 ATI4  
Display user profiles I5 ATI5  
Display the product configuration I7 ATI7  
Set modem speaker volume off L0 ATL0 No
Set modem speaker volume on L1 ATL1 No
Set modem speaker volume on L2 ATL2 Yes
Set modem speaker volume on L3 ATL3 No
The modem’s speaker is always off M0 ATM0 No
The modem’s speaker is on until a connection is made M1 ATM1 Yes
The modem’s speaker is always on M2 ATM2 No
The modem’s speaker is off during dialing, and on after dialing until the connection is made M3 ATM3 No
Return to online mode O0 ATO0  
Return to online mode and retrain (automatically return to the highest speed) O1 ATO1  
Display the list of S-register settings S$ ATS$  
Set S-Register "r" to "n" Sr=n ATSr=n  
Display the value of S-Register "r" Sr? ATSr?  
Display result codes in numeric form V0 ATV0 No
Display result codes in verbose form (words) V1 ATV1 Yes
Report basic call progress result codes, i.e., OK, CONNECT, RING, NO CARRIER, (also, for busy, if enabled, and dial tone not detected), NO ANSWER and ERROR X0 ATX0 No
Report basic call progress result codes and the connect rates—OK, CONNECT, RING, NO CARRIER (also, for busy, if enabled, and dial tone not detected), NO ANSWER, CONNECT XXXX and ERROR X1 ATX1 No
Report basic call progress result codes and the connect rates i.e., OK, CONNECT, RING, NO CARRIER (also, for busy, if enabled), NO DIAL TONE, NO ANSWER, CONNECT XXXX and ERROR X2 ATX2 No
Report basic call progress result codes and connection rate i.e., OK, CONNECT, RING, NO CARRIER, NO ANSWER, CONNECT XXXX, BUSY and ERROR X3 ATX3 No
Report all call progress result codes and connection rate i.e., OK, CONNECT, RING, NO CARRIER, NO ANSWER, CONNECT XXXX, BUSY, NO DIAL TONE and ERROR X4 ATX4 Yes
On the next reset, use &W0 settings Y0 ATY0 Yes
On the next reset, use &W1 settings Y1 ATY1 No
On the next reset use, &F0 settings Y2 ATY2 No
On the next reset, use &F1 settings Y3 ATY3 No
On the next reset, use &F2 settings Y4 ATY4 No
Reset the modem according to the settings of ATY Z0 ATZ0  
Reset the modem and use &W0 settings Z1 ATZ1  
Reset the modem and use &W1 settings Z2 ATZ2  
Reset the modem using &F0 settings and load factory default profile 1 Z3 ATZ3  
Reset the modem using &F1 settings and load factory default profile 0 Z4 ATZ4  
Reset the modem using &F2 settings and load factory default profile 2 Z5 ATZ5  
Display the list of AT commands $ AT$  
Display the list of ampersand commands &$ AT&$  
Disable data compression result codes &A0 AT&A0 No
Enable data compression result codes &A1 AT&A1 No
Enable modulation result codes &A2 AT&A2 No
Enable data compression result codes and add V.42bis and MNP 5 protocol indicators &A3 AT&A3 Yes
Use a floating DTE speed &B0 AT&B0 No
Use a fixed DTE speed &B1 AT&B1 Yes
Use a fixed DTE speed when using data compression &B2 AT&B2 No
Carrier detect is always on &C0 AT&C0 No
Carrier detect is controlled by the modem. &C1 AT&C1 Yes
Ignore DTR &D0 AT&D0 No
Use online command mode &D1 AT&D1 No
DTE controls DTR &D2 AT&D2 Yes
Set the factory profile that uses hardware (RTS/CTS) flow control (this is the active profile when the modem is shipped) &F0 AT&F0  
Set the factory profile that uses hardware (RTS/CTS) flow control &F1 AT&F1  
Set the factory profile that uses software (XON/XOFF) flow control &F2 AT&F2  
No guard tone &G0 AT&G0 Yes
Use 550 Hz guard tone &G1 AT&G1 No
Use 1800 Hz guard tone &G2 AT&G2 No
Flow control for transmitted data - Disable flow control &H0 AT&H0 No
Flow control for transmitted data - Enable hardware flow control (RTS/CTS) &H1 AT&H1 Yes
Flow control for transmitted data - Enable software (XON/XOFF) &H2 AT&H2 No
Flow control for received data - Disable flow control &I0 AT&I0 Yes
Flow control for received data - send XON/XOFF signals to modems on both ends &I1 AT&I1 No
Flow control for received data - send XON/XOFF signals to your modem only &I2 AT&I2 No
HP Eng/Ack in Host mode &I3 AT&I3 No
HP Eng/Ack in Terminal Mode &I4 AT&I4 No
Flow control for received data - If error correction is used, send XON/XOFF signals to your modem only; if data compression is not used, look for incoming XON/XOFF &I5 AT&I5 No
Disable data compression &K0 AT&K0 No
Enable data compression (V.42bis, MNP 5, NONE) &K1 AT&K1 Yes
Enable data compression (forces V.42bis) &K2 AT&K2 No
Use selective data compression &K3 AT&K3 No
Disable error correction in 1200bps and faster transfers &M0 AT&M0 No
Allow V.42 or MNP error correction in 1200bps and faster transfers &M4 AT&M4 Yes
Allow either V.42 or MNP error correction in 1200bps and faster transfers &M5 AT&M5 No
Ignore RTS &R1 AT&R1 No
Receive to DTE/RTS high &R2 AT&R2 Yes
Data Set Ready (DSR) is always on &S0 AT&S0 Yes
Data Set Ready (DSR) signals that the modem is ready to send data &S1 AT&S1 No
Write (store) user profile 0 to memory &W0 AT&W0  
Write (store) user profile 1 to memory &W1 AT&W1  
Store phone number &Zn=s AT&Zn=s  
Display phone number &Zn? AT&Zn?  
Display currently selected country +GCI? AT+GCI?  
Display available countries and their codes +GCI=? AT+GCI=?  
Set the current country configurations (determine the correct country code by issuing +GCI?) +GCI=nnn AT+GCI=nnn  

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