21
AT COMMANDS (continued)
\N1
Direct Mode. Modem does not use error
control; DTE rate and VF rate must be
the same.
\N2
MNP or Disc. Modem disconnects if it
does not connect in MNP mode.
\N3
MNP or Buffer. Modem connects in
Buffer mode if it does not connect in MNP
mode.
\N4
V.42/MNP or Disc. Modem disconnects if
it does not connect in V.42 or MNP mode.
\N5
V.42/MNP or Buffer. Modem connects
in Buffer mode if it does not connect
in V.42 or MNP mode.
\N6
LAPM or disconnect.
\N7
LAPM or buffer.
\Qn
Flow Control of DTE
\Q0, \Q5, \Q6
Disables flow control of DTE.
\Q1, \Q4
Enables XON/XOFF flow control.
\Q2, \Q3
Modem raises and lowers CTS to start
and stop flow control.
\Qn
Flow Control of Modem
\Q0, \Q2, \Q4
Disables flow control of modem.
\Q1, \Q5
Enables XON/XOFF flow control.
\Q3, \Q6
Modem starts and stops flow control
based upon state of DTE’s RTS signal.
\Tn
No Data Disconnect Timer
\T0
Disables no data disconnect timer.
\Tn
Sets no data disconnect timer to a value
from 1 minute to 255 minutes.
\Xn
XON/XOFF Passthrough
\X0
Disables transmission of flow control
characters to remote modem.
\X1
Enables transmission of flow control
characters to remote modem.
%A
n
Sets error control fallback character
n to
an ASCII value from 0 to 127.
%B
n
Sets data rate to
n (300 to 19200).
%Cn
MNP 5 Data Compression
%C0
Disables MNP5 data compression.
%C1
Enables MNP5 data compression.
%R
n
Sets DTE rate to
n (300 to 115200).
Hn
V.42 bis Data Compression
H0
Disables V.42bis data compression.
H1
Enables V.42bis data compression for
transmit only.
H2
Enables V.42bis data compression for
receive only.
H3
Enables V.42bis data compression
in both the transmit and receive
directions.
RESULT CODES
Numbers(1) Numbers(2) Words
0
0
OK
1
1
CONNECT
2
2
RING
3
3
NO CARRIER
4
4
ERROR
Result Codes 5–14, 16, 19 are enabled with the X1,
X2, X3, and X4 commands.
5
5
CONNECT 1200
6
6
NO DIALTONE
7
7
BUSY
8
8
NO ANSWER
10
10
CONNECT 2400
11
11
CONNECT 4800
12
12
CONNECT 9600
13
16
CONNECT 12000
14
13
CONNECT 14400
15
14
CONNECT 19200
16
15
CONNECT 7200
17
17
CONNECT 16800
19
19
CONNECT 300
Result Codes 20–27 are enabled with the X5
command (EC suffix) or the X6 command (V.42 or
MNP suffix).
20
10
CONNECT 2400/EC
21
11
CONNECT 4800/EC
22
12
CONNECT 9600/EC
23
16
CONNECT 12000/EC
24
13
CONNECT 14400/EC
25
17
CONNECT 16800/EC
26
15
CONNECT 7200/EC
27
5
CONNECT 1200/EC
29
14
CONNECT 19200/EC
Result Codes 15, 28–34 are enabled with the X7
command (DTE rate suffix).
28
28
CONNECT 38400
30
30
CONNECT 57600
32
32
CONNECT 76800
34
34
CONNECT 115200
DIAL COMMAND MODIFIERS
T
Tone Dial (DTMF)
P
Pulse Dial
,
Pause
W
Wait for Dial Tone
R
Reverse Dial
@
Quiet Answer
!
Hook Flash
;
Return to Command Mode
