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║ Intel High Speed Modem Command Guide ║
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BASIC MODEM COMMANDS
Command Description
________ _____________________________________________________
A Answer phone.
A/ Repeat the last command line.
AT Attention code. Must precede all commands except A/.
B Set the 300 bps/1200 bps protocol.
B,B0 CCITT V.21/V.22 protocol.
B1* Bell 103/212A protocol.
D Dial phone, using following modifiers:
String Phone number.
P Pulse.
R Reverse.
S=n Dial stored phone number n, where n=0-3.
T Tone.
W Wait for dial tone.
@ Wait for quiet.
, Pause.
; Resume command mode after dialing.
! Hook flash.
E Local echo control.
E, E0 No echo.
E1 Echo.
H Switch hook control.
H, H0 On hook (hang up phone).
H1 Off hook (pick up phone).
I Return product code and status.
I, I0 Return product ID.
I1 Compute ROM checksum and return value.
I2 Verify ROM checksum and return OK or ERROR.
I3 Report ROM part number and software revision number.
I4 Report modem capabilities in form meant for software
applications.
L Speaker volume control.
L, L0 Very low volume.
L1 Low volume.
L2 Medium volume.
L3 High volume.
M Speaker on or off.
M, M0 Speaker always off.
M1 Speaker on until carrier detected.
M2 Speaker always on.
M3 Speaker off when carrier detected and during dialing.
M4 Like M1, except speaker also on during retraining.
M5 Like M3, except speaker also on during retraining.
O Return to on-line mode. 3-7
O, O0 Return to on-line mode.
O1 Return to on-line mode and initialize retrain sequence.
Q Enable or disable result codes.
Q, Q0 Display result codes.
Q1 Don't display result codes.
S Read and write S-registers.
Sn Select S-register n as current register, n=0-27.
Sn? Read S-register n, n=0-27.
Sn=v Set S-register n to value v.
V Verbal or numeric result codes.
V, V0 Numeric result codes.
V1 Verbal result codes.
X Result codes and dialing options.
X, X0 Basic result codes only. CONNECT(1) result code on
connection. Doesn't wait for or recognize dial tone
and doesn't recognize busy signal.
X1 Like X0, except all CONNECT result codes can occur.
X2 Waits for dial tone before dialing, but doesn't
recognize busy signal. All CONNECT result codes can
occur.
X3 Recognizes busy signal, but doesn't wait for dial tone
before dialing. All CONNECT result codes can occur.
X4 Waits for dial tone before dialing and recognizes busy
signal. All CONNECT result codes can occur.
Y Long space disconnect.
Y, Y0 Long space disconnect disabled.
Y1 Long space disconnect enabled.
Z Zn Fetch configuration profile n from nonvolatile RAM,
n=0,1.
EXTENDED MODEM COMMANDS
Command Description
________ _____________________________________________________
&C Data carrier detect (DCD) options.
&C,&C0 DCD always on.
&C1 DCD on only when modem detects data carrier signal.
&C2 DCD on when idle or online (UNIX compatibility mode).
(&C2 works only on the Intel 14.4EXF, SatisFAXtion
Modem/400 and Modem/400e, but not the 9600EX or 14.4EX)
&D Data terminal ready (DTR) options.
&D,&D0 In asynchronous mode, modem ignores DTR; in synchronous
mode, modem treats &D0 like &D1.
&D1 Modem switches from on-line to command mode when
on-to-off DTR transition occurs.
&D2 Modem switches from on-line to command mode, hangs up,
and disables auto-answer when on-to-off DTR transition
occurs.
&D3 Modem reinitializes when on-to-off DTR transition
occurs.
&F Fetch factory configuration profile from ROM
&G Guard tones.
&G,&G0 No guard tone.
&G1 550 Hz guard tone.
&G2 1800 Hz guard tone.
&L Leased or dialup line selection.
&L, &L0 Dial-up line.
&L1 Leased line.
&L2 Leased line autoconnect.
&M Synchronous or asynchronous mode. (Performs same
function as &Q command.)
&M,&M0 Asynchronous.
&M1 Asynchronous in command mode; synchronous in on-line
mode.
&M2 When DTR goes on, modem dials number stored using &Z0
and switches to synchronous mode.
&M3 Synchronous when DTR is on; command mode when DTR is
off.
&P Make-to-break pulse dial ratio.
&P,&P0 39% make to 61% break (US and Canada).
&P1 33% make to 67% break (UK and Hong Kong).
&Q Synchronous or asynchronous mode. (Performs same
function as &M command.)
&Q,&Q0 Asynchronous.
&Q1 Asynchronous in command mode; synchronous in on-line
mode.
&Q2 When DTR goes on, modem dials number stored using
&Z0 and switches to synchronous mode.
&Q3 Synchronous when DTR is on; command mode when DTR is
off.
&R Request to send (RTS)/Clear to send (CTS) option (only
valid in synchronous mode [see &M, &Q, and \Q
commands]).
&R,&R0 CTS tracks RTS when modem is on line.
&R1 CTS always asserted.
&S Data set ready (DSR) options.
&S,&S0 DSR always on.
&S1 DSR off in command and test modes.
&T Diagnostic test commands.
&T,&T0 Terminate test in progress.
&T1 Local analog loopback.
&T3 Local digital loopback connection.
&T4 Grant remote digital loopback from remote.
&T5 Deny remote digital loopback from remote.
&T6 Remote digital loopback.
&T7 Remote digital loopback with self-test.
&T8 Local analog loopback with self-test
&V View active and stored configuration profiles and stored
phone numbers.
&W, &Wn Write active configuration profile n to to nonvolatile
RAM, n=0,1.
&X Clock source in synchronous mode.
&X, &X0 Modem generates transmit clock.
&X1 Local computer (or terminal) generates transmit clock.
&X2 Modem derives transmit clock from receive signal.
&Y Designate the stored profile to use when modem is first
turned on.
&Y, &Y0 Use profile 0.
&Y1 Use profile 1.
&Z &Zn=x Store telephone number string x in location n (n=0-3)
in nonvolatile RAM.
ERROR CORRECTION/DATA COMPRESSION COMMANDS
These commands work only on these fax modems and modems:
SatisFAXtion/400E 2400B MNP/2400EX MNP
SatisFAXtion/400 9600EX
SatisFAXtion/200 2400 V.42bis
SatisFAXtion Classic 14.4EX
Command Description
________ _____________________________________________________
\A Maximum MNP block size.
\A, A0 64 bytes.
\A1 128 bytes.
\A2 192 bytes.
\A3 256 bytes.
\B \Bn Send break of n hundred msec, where n=1-9. Default is
n=3.
\C Set Auto-reliable buffer.
\C, \C0 Disabled.
\C1 Buffer up to 200 data characters. If a reliable
character is received within three seconds, establish a
reliable connection. If 200 normal characters are
received and no reliable character, establish a normal
connection.
\C2 Disable the auto-reliable buffer. After receiving the
escape character defined by %A, establish a normal
connection.
\G Set modem-to-modem XON/XOFF flow control.
\G,\G0 Disable XON/XOFF.
\G1 Enable XON/XOFF.
\J Set serial bps rate adjust.
\J,\J0 Disable serial bps rate adjust.
\J1 Enable serial bps rate adjust.
\K \Kn Break type, where n=0-5. Default: n=5.
\N Asynchronous connection type
\N0 Normal mode.
\N1 Diagnostic mode.
\N2 Forced-MNP mode.
\N3 Auto-reliable mode.
\N4 Forced-LAPM (CCITT V.42) mode.
\O Initiate MNP reliable connection.
\Q Set serial port flow control.
\Q,\Q0 Disable flow control.
\Q1 Bidirectional XON/XOFF control.
\Q2 Unidirectional RTS/CTS control.
\Q3 Bidirectional RTS/CTS control.
\T \Tn Inactivity timer (n=0-90 minutes). Default: n=0
\U Accept MNP reliable connection.
\V Display error control and data compression information.
\V0 Standard CONNECT result codes.
\V1 CONNECT codes show general error control information.
\V2 CONNECT codes show full error control and data
compression information.
\V3 Similar to V0 except that the DTE speed is displayed in place
of the CONNECT speed. (ie. if the DTE is locked at 38400, the
modem displays CONNECT 38400 after all successful connections)
\X XON/XOFF pass through.
\X, \X0 Don't pass XON/XOFF through to remote modem.
\X1 Pass XON/XOFF codes through to remote modem.
\Y Switch to MNP reliable connection.
\Z Switch from MNP to normal connection.
%An Set auto-reliable fallback character, where n=0-127
(used with \C2). Default: n=13 (Enter key).
%C Enable or disable MNP class 5 data compression.
%C0 MNP data compression disabled.
%C1 MNP data compression enabled.
%E Auto-retrain.
%E,%E0 Modem won't generate retrain request, but will respond to
retrain request from other modem.
%E1 Modem will generate and respond to retrain request.
%E2 Modem initially negotiates for speeds up to 9600. After
connecting, modem renegotiates for faster speed if line
conditions allow. Also uses V.32 retrain technique instead of
the faster V.32bis technique.
-J Detect error control.
-J,-J0 Disable error control detection phase.
-J1 Enable error control detection phase.
"B DTE bit rate simulation (SatisFAXtion Modem/400 only)
"B=0 Match bit rate set up by the host computer. (default setting)
"B=1 Use two times the bit rate setup by the host computer.
"B=2 Use four times the bit rate set up by the host computer.
"B=3 Use the fastest rate at which the host computer can send and
receive data.
"H Enable or disable V.42bis data compression.
"H0 V.42bis data compression disabled.
"H1 Can send but not receive V.42bis data compression.
"H2 Can receive but not send V.42bis data compression.
"H3 Enable bidirectional V.42bis data compression.
"On Set maximum V.42bis data block size n (n=6-250).
Default: n=250.
"S Handshake timing.
"S, "S0 Originating modem waits 3 s after receiving 1200- or
2400-bps handshake tone; normal timing for V.32/V.32bis
modems.
"S1 Like "S0, except modem waits 1.6 s
"S2 Like "S0, except fast handshake performed with
V.32/V.32bis modems.
"S3 Like "S1, except fast handshake performed with
V.32/V.32bis modems.
S REGISTERS
Reading an S Register
You can use the S command to read the contents of an S register. here's
the format of the command:
ATSn?
The n parameter is the number from 0 to 31 that indicates the S register
you want to read). The modem will respond with a three-digit decimal
number indicating the contents of the requested register.
Writing an S Register
You can also write values to the S registers. Here's the format of the
command:
ATSn=value
The n parameter is a number from 0 to 31 that indicates the S register you
want to write to. The value parameter is the value you want to store in
the indicated register. The modem responds with OK.
List of S Registers
Reg- Factory
ister Setting Description
____ _____________________________________________________________
S0* 00 Number of rings before modem answers. Range: 0-255
rings.
S1 00 Ring count. Range: 0-255 rings.
S2 43 Escape code character. Can be any ASCII character
from 0-127.
S3 13 Carriage return character. Can be any ASCII character
from 0-127.
S4 10 Line feed character. Can be any ASCII character from
0-127.
S5 08 Backspace character. Can be any ASCII character from
0-32 or 127.
S6 02 Time to wait before blind dialing. Range: 0-255
seconds.
S7 60 Time to wait for carrier after dial. Range: 1-60
seconds.
S8 02 Time to pause for each comma. Range: 0-255 seconds.
S9 06 Carrier detect response time (in 1/10ths of a second).
Range: 1-255.
S10 14 Delay between lost carrier and hangup (in 1/10ths of
a second). Range: 1-255.
S11* 70 Dialing speed (in 1/1000ths of a second). Range:
50-255.
S12 50 Escape code guard (in 1/50ths of a second). Range:
0-255.
S14* 138 Bit-mapped options.
S16 00 Modem test options.
S18* 00 Maximum time for diagnostic tests. Range: 0-255
seconds.
S21* 48 Bit-mapped options.
S22* 118 Bit-mapped options.
S23* 11 Bit-mapped options.
S25* 05 Time DTR must remain off (in 1/100ths of a second).
Range: 0-255.
If &Q1 is in effect, S25 is the delay in seconds beginning
when the connection is established before the modem examines
the DTR signal.
S26* 01 RTS-to-CTS delay (in 1/100ths of a second).
Range: 0-255.
S27* 64 Bit-mapped options.
S28 08 Time (in seconds) allowed to attempt an MNP reliable
connection. Range: 0-255
S29 255 Internal buffer size (in words). Range:0-255; 255
yields 1K byte buffer.
S30 00 Number of retrains since last power up. Range: 0-255.
S31 00 Controls maximum connect speed.
00 Speed of last AT command
01 Reserved
02 Reserved
03 300bps
04 Reserved
05 1200bps
06 2400bps
07 4800bps
08 7200bps
09 9600bps
10 12000bps
11 14400bps
* The contents of these registers are stored in nonvolatile RAM.
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End of file Intel FaxBack # 4310 May 20,1993
