Command |
Syntax |
Function |
Default |
+++ |
+++ |
Escape to online
command mode (not preceded by AT) |
|
/ |
/ |
Pause (not
preceded by AT) |
125 ms |
A |
ATA |
Answer manually |
|
A/ |
A/ |
Repeat last
command (not preceded by AT) |
|
D |
ATD |
Dial |
|
|
|
n Phone
#, 0 through 9 |
|
DT |
ATDT |
T Tone
dial |
|
DP |
ATDP |
P Pulse
dial |
|
DR |
ATDR |
R Call an originate-only modem |
|
DTnWn |
ATDTnWn |
W Wait for second dial tone (X2, X4) |
|
DTWn@ |
ATDTWn@ |
@ Wait
for answer (X3, X4) |
|
DTn!n |
ATDTn!n |
! Flash
switch hook |
|
DTn#n |
ATDTn#n |
# Auxiliary
tone dial digit |
|
DTn,n |
ATDTn,n |
, Pause
in dialing (S8) |
2 seconds |
DTn*n |
ATDTn*n |
* Auxiliary
tone dial digit |
|
DTn;n |
ATDTn;n |
; Stay
in command mode after dialing |
|
DTn$n |
ATDTn$n |
$ Wait
for calling card bong |
|
DTn&n |
ATDTn&n |
& Wait
for calling card bong |
|
DTn"n |
ATDTn"n |
" Set
quote mode for the following |
|
D$ |
ATD$ |
Display a list of
dial commands |
|
DL |
ATDL |
Redial last
number |
|
DL? |
ATDL? |
Display last
dialed number |
|
DSn |
ATDSn |
Dial stored
number |
|
E0 |
ATE0 |
Turn command echo
off |
|
E1 |
ATE1 |
Turn command echo
on |
X |
F0 |
ATF0 |
Turn online echo
on |
|
F1 |
ATF1 |
Turn online echo
off |
X |
H0 |
ATH0 |
Hang up (go
on-hook) |
|
H1 |
ATH1 |
Pick up (go
off-hook) |
|
I0 |
ATI0 |
Display the
4-digit product code |
|
I1 |
ATI1 |
Display the
checksum |
|
I2 |
ATI2 |
Display the RAM
test results |
|
I3 |
ATI3 |
Display the
firmware version |
|
I4 |
ATI4 |
Display the
current modem settings |
|
I5 |
ATI5 |
Display user
profiles |
|
I7 |
ATI7 |
Display the
product configuration |
|
I8 |
ATI8 |
Display black
list screen |
|
I10 |
ATI10 |
Display VXD
configuration screen |
|
I11 |
ATI11 |
Display V.34 link
screen |
|
L0 |
ATL0 |
Set modem speaker
volume off |
|
L1 |
ATL1 |
Set modem speaker
volume on (low) |
|
L2 |
ATL2 |
Set modem speaker
volume on (medium) |
X |
L3 |
ATL3 |
Set modem speaker
volume on (high) |
|
M0 |
ATM0 |
The modem's
speaker is always off |
|
M1 |
ATM1 |
The modem's
speaker is on until a connection is made |
X |
M2 |
ATM2 |
The modem's
speaker is always on |
|
M3 |
ATM3 |
The modem's
speaker is off during dialing, and on after dialing until the connection is
made |
|
O0 |
ATO0 |
Return to online
mode |
|
O1 |
ATO1 |
Return to online
mode and retrain (automatically return to the highest speed) |
|
S$ |
ATS$ |
Display the list
of S-register settings |
|
Sr=n |
ATSr=n |
Set S-Register
"r" to "n" |
|
Sr? |
ATSr? |
Display the value
of S-Register "r" |
|
V0 |
ATV0 |
Display result
codes in numeric form |
|
V1 |
ATV1 |
Display result
codes in verbose form (words) |
X |
X0 |
ATX0 |
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 |
|
X1 |
ATX1 |
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 |
|
X2 |
ATX2 |
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 |
|
X3 |
ATX3 |
Report basic call
progress result codes and connection rate i.e., OK, CONNECT, RING, NO
CARRIER, NO ANSWER, CONNECT XXXX, BUSY and ERROR |
|
X4 |
ATX4 |
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 |
X |
Y0 |
ATY0 |
On the next
reset, use &W settings |
X |
Y1 |
ATY1 |
On the next
reset, use &W1 settings |
|
Y2 |
ATY2 |
On the next
reset, use &F settings |
|
Y3 |
ATY3 |
On the next
reset, use &F1 settings |
|
Y4 |
ATY4 |
On the next
reset, use &F2 settings |
|
Z0 |
ATZ0 |
Reset the modem
according to the settings of ATY |
|
Z1 |
ATZ1 |
Reset the modem
and use &W settings |
|
Z2 |
ATZ2 |
Reset the modem
and use &W1 settings |
|
Z3 |
ATZ3 |
Reset the modem
using &F settings and load factory default profile 1 |
|
Z4 |
ATZ4 |
Reset the modem
using &F1 settings and load factory default profile |
|
Z5 |
ATZ5 |
Reset the modem
using &F2 settings and load factory default profile 2 |
|
$ |
AT$ |
Display the list
of AT commands |
|
&$ |
AT&$ |
Display the list
of ampersand commands |
|
&A0 |
AT&A0 |
Disable data
compression result codes |
|
&A1 |
AT&A1 |
Enable data
compression result codes |
|
&A2 |
AT&A2 |
Enable modulation
result codes |
|
&A3 |
AT&A3 |
Enable data
compression result codes and add V.42bis and MNP 5
protocol indicators |
X |
&B0 |
AT&B0 |
Use a floating DTE speed |
X |
&B1 |
AT&B1 |
Use a fixed DTE speed |
|
&B2 |
AT&B2 |
Use a fixed DTE speed when using data compression |
|
&C0 |
AT&C0 |
Carrier detect is
always on |
|
&C1 |
AT&C1 |
Carrier detect is
controlled by the modem |
X |
&D0 |
AT&D0 |
Ignore DTR |
|
&D1 |
AT&D1 |
Use online
command mode |
|
&D2 |
AT&D2 |
DTE controls DTR |
X |
&D3 |
AT&D3 |
DTE controls DTR and reset |
|
&F0 |
AT&F0 |
Set the factory
profile that uses hardware (RTS/CTS) flow control (this is the active profile
when the modem is shipped) |
|
&F1 |
AT&F1 |
Set the factory
profile that uses hardware (RTS/CTS) flow control |
|
&F2 |
AT&F2 |
Set the factory
profile that uses software (XON/XOFF)
flow control |
|
&G0 |
AT&G0 |
No guard tone |
X |
&G1 |
AT&G1 |
Use 550 Hz guard
tone |
|
&G2 |
AT&G2 |
Use 1800 Hz guard
tone |
|
&H0 |
AT&H0 |
Flow control for
transmitted data - Disable flow control |
|
&H1 |
AT&H1 |
Flow control for
transmitted data - Enable hardware flow control (RTS/CTS) |
X |
&H2 |
AT&H2 |
Flow control for
transmitted data - Enable software (XON/XOFF) |
|
&H3 |
AT&H3 |
Flow control for
transmitted data - Enable both software and hardware flow control |
|
&I0 |
AT&I0 |
Flow control for
received data - Disable flow control |
X |
&I1 |
AT&I1 |
Flow control for
received data - send XON/XOFF
signals to modems on both ends |
|
&I2 |
AT&I2 |
Flow control for
received data - send XON/XOFF
signals to your modem only |
|
&I3 |
AT&I3 |
HP Eng/Ack in Host mode |
|
&I4 |
AT&I4 |
HP Eng/Ack in Terminal Mode |
|
&I5 |
AT&I5 |
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 |
|
&K0 |
AT&K0 |
Disable data
compression |
|
&K1 |
AT&K1 |
Enable data
compression (V.42bis, MNP 5, NONE) |
X |
&K2 |
AT&K2 |
Enable data
compression (forces V.42bis) |
|
&K3 |
AT&K3 |
Use selective
data compression |
|
&M0 |
AT&M0 |
Disable error
correction in 1200 bps and faster transfers |
|
&M4 |
AT&M4 |
Allow V.42 or MNP error correction in 1200 bps and faster transfers |
X |
&M5 |
AT&M5 |
Allow either V.42
or MNP error correction in 1200 bps and faster
transfers |
|
&N0 |
AT&N0 |
Highest link
speed |
X |
&N1 |
AT&N1 |
Link Speed - 300
bps |
|
&N2 |
AT&N2 |
Link Speed - 1200
bps |
|
&N3 |
AT&N3 |
Link Speed - 2400
bps |
|
&N4 |
AT&N4 |
Link Speed - 4800
bps |
|
&N5 |
AT&N5 |
Link Speed - 7200
bps |
|
&N6 |
AT&N6 |
Link Speed - 9600
bps |
|
&N7 |
AT&N7 |
Link Speed -
12000 bps |
|
&N8 |
AT&N8 |
Link Speed -
14400 bps |
|
&N9 |
AT&N9 |
Link Speed -
16800 bps |
|
&N10 |
AT&N10 |
Link Speed -
19200 bps |
|
&N11 |
AT&N11 |
Link Speed -
21600 bps |
|
&N12 |
AT&N12 |
Link Speed -
24000 bps |
|
&N13 |
AT&N13 |
Link Speed -
26400 bps |
|
&N14 |
AT&N14 |
Link Speed -
28800 bps |
|
&N15 |
AT&N15 |
Link Speed -
31200 bps |
|
&N16 |
AT&N16 |
Link Speed -
33600 bps |
|
&N17 |
AT&N17 |
Link Speed -
33333 bps |
|
&N18 |
AT&N18 |
Link Speed -
37333 bps |
|
&N19 |
AT&N19 |
Link Speed -
41333 bps |
|
&N20 |
AT&N20 |
Link Speed -
42666 bps |
|
&N21 |
AT&N21 |
Link Speed -
44000 bps |
|
&N22 |
AT&N22 |
Link Speed -
45333 bps |
|
&N23 |
AT&N23 |
Link Speed -
46666 bps |
|
&N24 |
AT&N24 |
Link Speed -
48000 bps |
|
&N25 |
AT&N25 |
Link Speed -
49333 bps |
|
&N26 |
AT&N26 |
Link Speed -
50666 bps |
|
&N27 |
AT&N27 |
Link Speed -
52000 bps |
|
&N28 |
AT&N28 |
Link Speed -
53333 bps |
|
&N29 |
AT&N29 |
Link Speed -
54666 bps |
|
&N30 |
AT&N30 |
Link Speed -
56000 bps |
|
&N31 |
AT&N31 |
Link Speed -
57333 bps |
|
&R1 |
AT&R1 |
Ignore RTS |
|
&R2 |
AT&R2 |
Receive to DTE/RTS high |
X |
&S0 |
AT&S0 |
Data Set Ready (DSR) is always on |
X |
&S1 |
AT&S1 |
Data Set Ready (DSR) signals that the modem is ready to send data |
|
&U0 |
AT&U0 |
Variable link
rate floor |
X |
&U1 |
AT&U1 |
Minimum link
rate-300 bps |
|
&U2 |
AT&U2 |
Minimum link
rate-1200 bps |
|
&U3 |
AT&U3 |
Minimum link
rate-2400 bps |
|
&U4 |
AT&U4 |
Minimum link
rate-4800 bps |
|
&U5 |
AT&U5 |
Minimum link
rate-7200 bps |
|
&U6 |
AT&U6 |
Minimum link
rate-9600 bps |
|
&U7 |
AT&U7 |
Minimum link
rate-12000 bps |
|
&U8 |
AT&U8 |
Minimum link
rate-14400 bps |
|
&U9 |
AT&U9 |
Minimum link
rate-16800 bps |
|
&U10 |
AT&U10 |
Minimum link
rate-19200 bps |
|
&U11 |
AT&U11 |
Minimum link
rate-21600 bps |
|
&U12 |
AT&U12 |
Minimum link
rate-24000 bps |
|
&U13 |
AT&U13 |
Minimum link
rate-26400 bps |
|
&U14 |
AT&U14 |
Minimum link
rate-28800 bps |
|
&U15 |
AT&U15 |
Minimum link
rate-31200 bps |
|
&U16 |
AT&U16 |
Minimum link
rate-33600 bps |
|
&U17 |
AT&U17 |
Minimum link
rate-33333 bps |
|
&U18 |
AT&U18 |
Minimum link
rate-37333 bps |
|
&U19 |
AT&U19 |
Minimum link
rate-41333 bps |
|
&U20 |
AT&U20 |
Minimum link
rate-42666 bps |
|
&U21 |
AT&U21 |
Minimum link
rate-44000 bps |
|
&U22 |
AT&U22 |
Minimum link
rate-45333 bps |
|
&U23 |
AT&U23 |
Minimum link
rate-46666 bps |
|
&U24 |
AT&U24 |
Minimum link
rate-48000 bps |
|
&U25 |
AT&U25 |
Minimum link
rate-49333 bps |
|
&U26 |
AT&U26 |
Minimum link
rate-50666 bps |
|
&U27 |
AT&U27 |
Minimum link
rate-52000 bps |
|
&U28 |
AT&U28 |
Minimum link
rate-53333 bps |
|
&U29 |
AT&U29 |
Minimum link
rate-54666 bps |
|
&U30 |
AT&U30 |
Minimum link
rate-56000 bps |
|
&U31 |
AT&U31 |
Minimum link
rate-57333 bps |
|
&W0 |
AT&W0 |
Write (store)
user profile 0 to memory |
|
&W1 |
AT&W1 |
Write (store)
user profile 1 to memory |
|
&Zn=s |
AT&Zn=s |
Store phone
number |
|
&Zn? |
AT&Zn? |
Display phone
number |
|