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1993-07-20
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Full AT Command Set Listing for the SupraFAXModem Series
NOTE: This file includes commands, result codes, and display codes
NOT AVAILABLE on all models and revisions. Some commands are new
or were omitted from Reference Manual. NOT ALL commands are
available or functional in all modes and states. This document
is provided for reference only and is NOT certified to be free
from errors. This document is produced and maintained by Supra's
Technical Support Staff as a customer service.
AT_LIST.TXT Rev 2.9 (PHM 7/20/93) from Supra BBS (503)967-2444
The command string buffer on the SupraFAXModem is limitted to 254 charactors.
DIRECT Commands (Commands NOT preceded by other charactors)
A/ Re-execute Last Command
nnn Escape Code per setting in register S2 (Default is ANSI charactor 43,
the "+" symbol) (This command must be proceded and followed by a
minimum period of no transmission set is register S12.)
<CR> (A carriage return) - Terminate connection attempt in progress during
the dialing or protocol neg. process.
DIALING Commands (Commands that follow ATD)
-()i These symbols and spaces are ignored (or invalid and therefore ignored)
and maybe be used in the dialing string.
0-9 DTMF code for the given number
A-D DTMF code for the given letter
J Do MNP 10 link negotiation at highest rate (this call only, see *H)
K Enable power level adj. during MNP 10 link neg. (this call only, see Mn)
L Dial the last dialing string (limitted to the first 40 charactors).
P Pulse dial the following digits
R Reverse Carrier Mode (Dial with ANSWER rather than ORIGINATE carrier.)
(Some models accept, but do not support, this command.)
Normal Mode: Calling Side: ATDTn Answering Side: ATA
Reverse Mode: Calling Side: ATDTnR Answering Side: ATXD
Sn Use dialing string stored in register n (0 to 3)
T Tone dial the following digits
W Wait for dialtone
* DTMF code for "star"
# DTMF code for "gate"
@ Wait for "quiet answer" (A 5 second silence.)
, Pause (time set in S8) before finishing dialing string
! Hook flash (go on-hook for 700ms)
^ Turn on 1300Hz call originating pulse
; Return to command state after dialing (last command processed in string)
> Generate a grounding pulse on the EARTH relay output
(If country code setting supports it)
AT Commands (Commands that follow AT)
=x Write value x to the last S register viewed.
? Displays current setting for the last S register accessed.
A Answer Phone Line
Bn BELL/CCITT mode switch at 300 & 1200 bps
B0=CCITT
B1=BELL (default in North America)
C1 Carrier Control Selection
Provided for backward compatibility only. Does nothing but return "OK"
D Dial Command
Dials any mixed string of dialing commands. (See Dialing Commands)
En Command Echo
E0=not echo
E1=do echo (default)
Fn {Function varies by model}
On-line State Character Echo Selection
F0 Not Supported (Returns "ERROR")
F1 Provided for backward compatibility only. (Returns "OK")
Line Select Modulation (Use either ATFn or a combination of ATS37=n
and ATN0, but DO NOT try to USE BOTH at the same time.)
F0 AutoMode Selection (try rates in order from fast to slow).
F1 300 bps only (protocol according to Bn setting)
F2 Not Used (return "OK")
F3 v.23 only 75TX/1200RX (originate) or 1200TX/75RX (answer)
F4 1200 bps only (protocol according to Bn setting)
F5 2400 bps only (v.22bis)
F6 4800 bps only (v.32/v.32bis)
F7 7200 bps only (v.32bis)
F8 9600 bps only (v.32/v.32bis)
F9 12000 bps only (v.32bis)
F10 14400 bps only (v.32bis)
Hn Hook Control
H0=On-Hook (Hang Up)
H1=Off-Hook (pick up phone line)
In Identification Codes
I0=SupraFAXModem product ID code
I1=ROM checksum
I2=Test Checksum (OK if correct, ERROR if not)
I3=ROM revision code
I4=Encrypted report of supported protocols
I5=Supra Copyright info.
I6=Country Code for country PSTN Signals are Configured for.
I10=Supported Features (encoded - see end of text for listing)
Ln Speaker Volume
L0,L1 Low
L2 Medium (default)
L3 High
L+n Increase Total Volume Gain n units (1-32) (Not the same as Ln)
L-n Decrease Total Volume Gain n units (1-32) (Not the same as Ln)
Mn Speaker Control
M0 OFF
M1 On until carrier is received (default)
M2 Always On
M3 On when answering/On only after dialing & until carrier detect
Nn AutoMode Connection (Carrier Rate when Originating Call)
N0=Connect ONLY at rate set in S37 register
(N0S37=0 forces the modem to dial at the current serial port rate.)
N1=Connect Normally (default)
On Return from COMMAND MODE to ONLINE state
O0=Return to ONLINE state
O1=Request a retrain & Return to ONLINE state
P Set dialing mode to PULSE
Qn Result Code Mode
Q0=Enabled (Default)
Q1=Disabled
Q2=Enabled when Originating, Disabled when answering
Sr? Reports value in S register r
SCr? Reports value is SC register r
Sr=n Write value n into S register r
SCr=n Write value n into SC register r
T Set dialing mode to TONE
Vn Result Code mode select
V0=Numeric
V1=Verbose (default)
Wn Error Correction Result Code Selection
W0=CONNECT XXXX (DTE rate) (default)
W1=Report Error Correction Mode
W2=CONNECT XXXX (DCE rate)
Xn Dialing mode/CONNECT result codes
X0=Blind Dial (ignore Dialtone & Busy), send CONNECT
X1=Blind Dial, send CONNECT XXXX
X2=follow Dialtone, but ignore Busy, send CONNECT XXXX
X3=follow Busy, but ignore Dialtone, send CONNECT XXXX or BUSY
X4=send CONNECT XXXX, BUSY, or NO DIALTONE (default)
Yn Long Space Disconnect
Y0=Not active (default)
Y1=Active (see manual)
Zn Soft reset and Load Stored profile n (last functional command on line)
Z0=resets modem & loads stored profile 0
Z1=resets modem & loads stored profile 1
-Kn MNP Extended Services (MNP 10)
-K0 Disable v.42 LAPM to MNP 10 connection
-K1 Enable v.42 LAPM to MNP 10 connection
-Qn Fallback to v.22bis/v.22 in MNP10 mode
-Q0 Disabled (Fallback only allowed to 4800 bps)
-Q1 Enabled (Fallback allowed to v.22bis/v.22) (Default)
&Cn DCD (RLSD) signal control
&C0=DCD always on
&C1=DCD follows carrier state (ON when carrier present)
&Dn Modem reaction to DTR on to off transition greater than S25 setting
a b c d e (Settings of &Qn)
&D0= N 1 3 3 1
&D1= 2 2 3 3 2
&D2= 3 3 3 3 3
&D3= 4 4 3 3 4
List of modem reactions:
N=No Action
1=Disconnect & send OK result code
2=Swith to asynchronous command state
3=Disconnect return to command state (Answer disabled while DTR is off)
4=Perform soft reset (like ATZ0)
List of &Q states:
a. &Q0, &Q5, &Q8, or &Q9
b. &Q1
c. &Q2
d. &Q3
e. &Q4
&Fn Load Factory Default Configuration
&F0 No flow control, No error correction, No data compression
&F1 MAC hardware flow control, correction & compression active
&F2 Hardware flow control, correction & compression active
(&F2 is default for DOS, WINDOWS, AMIGA, & STAND ALONE units.)
&Gn Guard Tone Selection
&G0 Do Not generate guard tones (US Default)
&G1 Generate 550Hz guard tone (not supported)
&G2 Generate 1800Hz quard tone (World Wide support models only)
&Jn Phone Jack Selection
&J0 Select RJ-11, RJ-41, & RJ-45S (Default)
&J1 Select RJ-12 & RJ-13 (not supported)
&Kn Serial Port Flow Control
&K0=None
&K3=Bidirectional Hardware (RTS/CTS)
&K4=Software (XON/XOFF)
&K5=Transparent Software flow control
&K6=Software (XON/XOFF) & Hardware (RTS/CTS) flow control
&Ln Line Type Selection
&L0 Dial-up line (Default)
&L1 Leased Line (not supported)
&Mn Same function as &Q(0-3) settings.
&Pn Pulse dialing MAKE/BREAK ratio {varies by model}
&P0 39%/61% make/break ratio at 10PPS {US/CANADA} (Default)
&P1 33%/67% make/break ratio at 10PPS {UK/Hong Kong}
&P2 33%/67% make/break ratio at 20PPS {Japan}
&P0 39%/61% make/break ratio at 10PPS {US/CANADA} (Default)
&P1 33%/67% make/break ratio at 10PPS {UK/Hong Kong}
&P2 39%/61% make/break ratio at 20PPS
&P3 33%/67% make/break ratio at 20PPS {Japan}
&Qn Asynchronous/Synchronous Mode Selection
&Q0 Asynchronous Direct mode
&Q1 * Synchronous Mode 1 (Terminal must support both modes.)
Call placed Async, modem switches to Sync. When DTR is dropped
modem returns to Async.
&Q2 * Synchronous Mode 2 Modem dials number in stored location 0
when DTR goes from LOW to HIGH.
&Q3 * Synchronous Mode 3 Dial number manually on a telephone, and
then bring DTR high to let the modems connect.
* CAUTION! Be VERY careful when issuing these commands! Once you enter
&Q(1-3) and save it to memory, there are only three known
ways to return to Asynchronous Mode:
1. Issue AT &Q(0,5-9) &W from a Synhronous Terminal to restore
the modem to Asynchronous Mode.
2. Connect modem to an Asynchronous Terminal with the DTR
signal (line 20) disabled (a "break-out" box works very
nicely for this) and issue the configuration you want or
AT &Q(0,5-9) &W to return the modem to Asynchronous Mode.
3. Send the modem in to our repair department.
&Q4 Not Used
&Q5 Asynchronous Reliable Mode (most common default)
&Q6 Asynchronous Normal Mode
&Q7 Not used
&Q8 Asynchronous Reliable Mode w/o v.42/v.42bis
&Q9 Asynchronous Reliable Mode w/o MNP 2-5
&Rn RTS Synchronous Mode
(In Asynchronous mode CTS is always ON unless &K3 is set.)
&R0 CTS responds to RTS (default)
&R1 CTS always on unless &K3 is set
&Sn DSR Action Select
&S0 Always on (default)
&S1 Follows EIA specification (Active following carrier tone, and
until carrier is lost.)
&Tn Modem test modes for trained technicians (you must set the serial port
at 2400 or 9600, set the modem with AT&F0, and set S18 between 1 and
255if you wish the tests to stop on their own.)
AT&T0 Terminate test in progress
AT&T1 Local Analog Loopback (+++ then &T0 to stop)
AT&T2 Returns ERROR
AT&T3 Local Digital Loopback for remote modem
AT&T4 Grant request for Remote Digital Loopback (default)
AT&T5 Prohibit request for Remote Digital Loopback
AT&T6 Remote Digital Loopback
AT&T7 Remote Digital Loopback with self-test
AT&T8 Local Analog Loopback with self-test (+++ then &T0 to stop)
&V Display Configuration Profiles
&Wn Write ACTIVE Profile to Stored Profile n
&W0 Writes to profile 0
&W1 Writes to profile 1
&Xn Synchronous Transmit Clock Source
&X0=Modem generated (default)
&X1=DTE supplied
&X2=Derived from the data carrier received from the remote modem.
&Yn Select Configuration Loaded at power-up
&Y0=Load profile 0 (default)
&Y1=Load profile 1
&Zx=n Write stored telephone number x (0 to 3) the number n.
\An Maximum MNP Block Size for Stream Links
\A0 64 characters
\A1 128 characters
\A2 192 characters (default - although may vary by model)
\A3 256 characters
\Bn Transmit Break of length n x 100ms where n is 1 to 9 in non-error
correction state. (Sends Link Attention in MNP mode)
\En Optimize Echo Cancellation {accepted, but not functional on some models}
\E1 One shot that minimizes local echo to try to match local network
\F Display Telephone Directory (As stored via AT&Zn)
\Gn Modem-to-Modem XON/XOFF flow control (Normal and Direct Mode Only)
\G0=Disabled (default)
\G1=Enabled
\Jn Enable DTE Auto Rate Adjustment
\J0 Disabled
\J1 DTE rate is adjusted to match carrier rate.
\Kn Break Processing Control (controls remote modem during MNP mode)
When received from local DTE & Modem is in Data Transfer Mode:
\K0,\K2,\K4 Enter command state without sending BREAK to remote
\K1 Clear Modem & Terminal Buffers & send BREAK to remote
\K3 Don't clear Buffers, but send BREAK to remote
\K5(default) Send BREAK to remote in sequence with any transmitted
data (default)
In Escape (Online Command) mode:
\K0,\K1 Clear data buffers and sends break to remote modem.
\K2,\K3 Send break to remote modem immediately.
\K4,\K5(default) Send break to remote modem in sequence with data.
When received from remote modem in non-error correction mode:
\K0,\K1 Clear data buffers and sends break to DTE
\K2,\K3 Send break to DTE immediately.
\K4,\K5(default) Send break in sequence with received data to DTE.
\Ln MNP Block Transfer Control
\L0 Use Stream Mode for MNP Links (default)
\L1 Use Block Mode for MNP Links
\N Operating Mode
\N0 Normal Mode
\N1 Direct Mode
\N2 MNP Reliable Mode
\N3 AutoReliable Mode
\O Originate MNP Reliable Mode Request
\S Report Active Configuration
\Tn Set Inactivity Timer (Modem disconnects if no activity in time n.)
\Tn=0 Timer disabled (default)
\Tn=1 to 42 Modem disconnects after n minutes without activity
\U Accept MNP Reliable Request (request must occur within 12 seconds)
\W Split-Speed Operation (v.23)
\W0 Disable split-speed mode (default)
\W1 Enable split-speed mode v.23 (forces F3)
\Y Switch to MNP Reliable Mode
\Z Switch from MNP to Normal Mode
%Cn Data Compression Enable/Disable
%C0 Disabled
%C1 MNP5 Enabled
%C2 V.42bis (BTLZ) Enabled
%C3 MNP5 & V.42bis (BTLZ) Enabled
%Dn BTLZ Dictionary Size
%D0=512
%D1=1024
%D2=2048 (default)
%D3=4096 (if one-way compression %M1 or %M2 is enabled)
2048 (if two-way compression %M3)
%En Auto Retrain & Fallback/Fall Forword based on line quality monitoring
%E0=Disabled (Default)
%E1=Enable Auto Retrain based on line quality
%E2=Enable Fallback/Fall Forward baed on line quality
%Fn Split-Speed Direction Select
%F1 75TX/1200RX
%F2 1200TX/75RX
%F3 v.23 Half-Duplex (independant of \W)
%Gn Rate Renegotiation based on line monitor readings
%G0=Disabled
%G1=Enabled (Default)
%L Reports Received Signal Level (at connection to DSP) nnn in -dBm.
nnn=9 or stronger reports as 9
nnn=10 to 42 reports as value directly
nnn=43 or weaker reports as 43
%Mn {Function varies by model}
AUXCTL Output Line Control
%M0 Line high only while modem in synchronous data mode (default)
%M1 Line low only while modem in synchronous data mode
BTLZ Compression Mode
%M0 Disabled
%M1 Transmit compression only
%M2 Receive compression only
%M3 Two-way compresion (default)
%P Clear Local & Remote Modems' BTLZ Dictionaries
%Q Report Received signal Quality (nnn range 0 to 127)
nnn=1 to 8 current signal quality excellent (higher rate may be used)
nnn=9 to 20 current signal good (best carrier rate for line condition)
nnn=20 to 30 current signal poor (lower carrier rate should be used)
nnn=31 to 127 signal very bad (or gone), try forcing a lower rate
NOTE: Modem uses 8 and 20 as rate renegotiation watermarks.
%Sn Set Maximum BTLZ string length n (6 to 250) (default is 32)
%TTnn PTT Testing Utilities
(Set S10=255 to transmit data in the absence of a received signal)
00-09 DTMF tone dial digits 0 to 9
0A DTMF digit *
0B DTMF digit A
0C DTMF digit B
0D DTMF digit C
0E DTMF digit #
0F DTMF digit D
10 v.21 channel #1 mark (originate) symbol
11 v.21 channel #2 mark symbol
12 v.23 backward channel mark symbol
13 v.23 forward channel mark symbol
14 v.22 originate signalling at 600 bps
15 v.22 originate signalling at 1200 bps
16 v.22bis originate signalling at 2400 bps
17 v.22 answer signalling (guard tone if PTT required)
18 v.22bis answer signalling (quard tone if required)
19 v.21 channel #1 space symbol
1A v.21 channel #2 space symbol
1B v.23 backward channel space symbol
1C v.23 forward channel space symbol
1D v.27ter carrier
1E v.29 carrier
20 v.32 @9600 bps
21 v.32bis @14400 bps
22 v.17 @14400 bps
30 Silence (on-line) - i.e. go off-hook
31 v.25 answer tone
32 1800 Hz guard tone
33 v.25 calling tone (1300Hz)
34 Fax calling tone (1100Hz)
*B Return Blacklisted Numbers
Displays a numbered chart of currently BLACKLISTED numbers {Except
permanently forbidden numbers based on country setting} "OK" is
returned if no temporary numbers are BLACKLISTED.
*C Remote Password Configuration (for MNP connections ONLY)
Gives ENTER PASSWORD prompt and accepts a 6 to 12 charactor
alphanumeric string. (Default is QWERTY)
*D Return Delayed Numbers
Displays a numbered chart of DELAYED numbers and the length of delay
in the format HH:MM:SS "OK" is returned if no numbers are delayed.
*E Exit Remote Configuration Mode
*Hn Link Negotiation Speed (MNP 10)
*H0 Link negotiation occurs at highest supported rate (Default)
*H1 Link negotiation occurs at 1200 bps.
*H2 Link negotiation occurs at 4800 bps.
*L Display Secure Access Directory
Displays a numbered chart (0-19) of all secure access (callback)
directory entries in the following format: #-Password:Callback_Number
If no callback number is set then the colon is omitted.
*NCnn Country Select
Sets country PSTN parameters to the code number specified.
ERROR is returned if the country selected is not currently supported.
*Px:p:n Store/Delete a Password/Phone Number Pair
*Px(0-19):p(password of 6 to 12 charactors):n(0 to 40 dialing codes)
If the last colon and dialing codes are omitted then password check
occurs, but no call-back occurs.
*R Request Remote Configuration Mode (during MNP mode connection ONLY)
If successful, a REMOTE PASSWORD prompt is display, and you should
issue the 6 to 12 charactor password currently set. If the password
is accepted, a !AT prompt will be displayed and a limitted set of
commands can then be issued with the "AT" header omitted. Exit this
mode with the *E command.
*Zn Change Dialing Codes (Used in countries like NORWAY that support two
methods of pulse dialing.)
*Z0 Use dial code 0 (default)
*Z1 Use dial code 1
#CID? Displays current CallerID mode (0-2)
#CID=n Caller ID Mode
#CID=0 Disable Caller ID (Default)
#CID=1 Enable Formatted Caller ID Mode
Result code syntax is as follows:
DATE=MMDD (where MM is month number 01-12 & DD is day 01-31)
TIME=HHMM (where HH is hour 00-23 & MM is minute 00-59)
NMBR= number code or statement
Statements are used for calls from non-CallerID Areas and
subscribers requesting not to be displayed. The NMBR code format
is controlled by the phone service provider, but seems to follow
one of two patterns:
5039672400 (area_code, local_exchange, subscriber_number)
037035303339363732343030
CCCC^N^N^N^N^N^N^N^N^N^N C is Code, ^ is spacer symbol, N is number
5 0 3 9 6 7 2 4 0 0 (notice the number is still included)
NAME= listed subscriber name <this is an option not always supported>
#CID=2 Enable Raw (ASCII printable HEX number) Mode
#CID=? Returns Caller ID Modes supported.
)M Cellular Power Level Adjustments (MNP 10)
)M0 Power not adjusted during MNP 10 link negotiation (Default)
)M1 Power level adjusted during MNP 10 link negotiation.
V.25 BIS Command Set
**** Coming soon! ****
S Registers
S0 Number of Rings to Auto Answer (0 to 255) (0 is disable & default)
S1 Number of Rings before last answer.
S2 Escape Code character (0 to 255) (default is 43 "+")
S3 Carriage Return character (0-127) (default is 13)
S4 Line Feed character (0-127) (default is 10)
S5 Backspace character (0-32) (default is 8)
S6 Time to Wait before Blind Dial (2-255 seconds) (default is 2)
(Applies only in X,X1, or X3 dialing mode)
S7 Time to Wait for Carrier (1-255 seconds) (default is 50)
S8 Pause Time for Comma Dial Command (0-255 seconds) (default is 2)
S9 Time to Wait Before Recognizing Carrier (1-255 1/10 seconds)
(Default is 6)
S10 Delay from Lost Carrier to Hang Up (1-255 1/10 seconds) (Default is 14)
S11 DTMF Tone Duration/Spacing (35 to 102 1/100 seconds) (Default is 95)
S12 Escape Code Guard Time (0 to 255 1/50 seconds) (0 to disable, the
default is 50)
S13 Reserved
S14 Bit Mapped Option Status Codes
Bit(Dec)
0 (1) Reserved
1 (2) Command echo (En)
0 Disabled (E0)
1 Enabled (E1 default)
2 (4) Quiet Mode (Qn)
0 Send result codes (Q0 default)
1 No result codes (Q1)
3 (8) Result codes (Vn)
0 Numeric (V0)
1 Verbose (V1 default)
4 (16) Reserved
5 (32) Dial Mode
0 Tone (T default)
1 Pulse (P)
6 (64) Reserved
7 (128) Carrier Mode
0 Answer
1 Originate
S15 Reserved
S16 Diagnostic Test Mode setting -Bit Mapped (default 0)
0 &T1 0 Disable 1 Enable
1 Not Used
2 &T3 0 Disable 1 Enable
3 &T4/&T5 0 Off 1 In progress
4 &T6 0 Disable 1 Enable
5 &T7 0 Disable 1 Enable
6 &T8 0 Disable 1 Enable
7 Not Used
S17 Reserved
S18 Test Mode Timer (0-255 seconds, 0=Runs endlessly)
S19 Reserved
S20 Reserved
S21 Bit Mapped Option Status Codes
Bit(Dec)
0 (1) Set by &Jn command but ignored otherwise
0 &J0 (default)
1 &J1
1 (2) Reserved
2 (4) CTS Mode (&Rn)
0 CTS always on (&R0)
1 CTS follows RTS (&R1 default)
3 (8) & 4 (16) DTR behavior (&Dn)
0,0 &D0 (default)
1,0 &D1
0,1 &D2
1,1 &D3
5 (32) DCD (RLSD) behavior (&Cn)
0 &C0 (Default)
1 &C1
6 (64) DSR behavior (&Sn)
0 &S0 (Default)
1 &S1
7 (128) Long space diconnect (Yn)
0 Y0 (Default)
1 Y1
S22 Bit Mapped Option Status Codes
Bit(Dec)
0 (1) & 1 (2) Speaker volume (Ln)
0,0 Low (L0)
1,0 Low (L1)
0,1 Medium (L2 default)
1,1 High (L3)
2 (4) & 3 (8) Speaker control (Mn)
0,0 Disabled (M0)
1,0 On until carrier (M1 default)
0,1 ON Always (M2)
1,1 On during handshake (M3)
4 (16), 5 (32), & 6 (64) Dialing Mode / Result Codes (Xn)
0,0,0 X0
1,0,0 Reserved
0,1,0 Reserved
1,1,0 Reserved
0,0,1 X1
1,0,1 X2
0,1,1 X3
1,1,1 X4 (Default)
7 (128) Reserved
S23 Bit Mapped Option Status Codes
Bit(Dec)
0 (1) Grant RDL
0 RDL not allowed (&T5)
1 RDL allowed (&T4 default)
1 (2), 2 (4), & 3 (8) Assumed DTE Rate
0,0,0 0-300 bps
1,0,0 600 bps
0,1,0 1200 bps
1,1,0 2400 bps (Default)
0,0,1 4800 bps
1,0,1 9600 bps
0,1,1 19200 bps
1,1,1 Reserved
4 (16) & 5 (32) Assumed DTE parity
0,0 Even
1,0 Reserved
0,1 Odd
1,1 None (default)
6 (64) & 7 (128) Guard tone (&Gn)
0,0 None (&G0 Default)
1,0 550 Hz (&G1)
0,1 1800 Hz (&G2)
1,1 Reserved
S24 Sleep Inactivity Timer (0-255 seconds 0 default/disable)
Number of seconds before modem enters sleep mode without either DTE or
phone line activity.
S25 Delay to DTR (0-255 1/100 seconds, 5 default)
S26 RTS/CTS Delay (0-255 1/100 seconds, 1 default) (Sync mode only)
S27 Bit Mapped Option Status
Bit(Dec)
0 (1), 1 (2), 3 (8) Sync/Async Mode Selection (&Mn/&Qn)
0,0,0 &M0/&Q0
1,0,0 &M1/&Q1
0,1,0 &M2/&Q2
1,1,0 &M3/&Q3
0,0,1 &Q4
1,0,1 &Q5 (Default)
0,1,1 &Q6
2 (4) Leased line control (&Ln)
0 Dial-up line (&L0 default)
1 Leased line (&L1)
4 (16) & 5 (32) Internal Sync clock select (&Xn)
0,0 Internal (&X0 default)
1,0 External (&X1)
0,1 Slave (&X2)
6 (64) CCITT/Bell Mode (Bn)
0 CCITT (B0)
1 Bell (B1 US default)
7 (128) Reserved
S28 Bit Mapped Options
Bit(Dec)
0 (1) V.23 split screen (\Wn)
0 Disabled (\W0 default)
1 Enabled (\W1)
1 (2) V.23 split screen direction
0 75Tx (%F0 default)
1 1200Tx (%F1 default)
2 (4) V.23 half-duplex
0 Disabled
1 Enabled (%F3)
3 (8) & 4 (16)
Pulse dialing mode (&Pn)
0,0 &P0 (Default)
1,0 &P1
0,1 &P2
1,1 &P3
5 (32) Reserved
6 (64) Reserved
7 (128) Reserved
S29 Flash Dial Modifier Time
S30 Inactivity Timer (0-255 Unit 10 seconds, 0=disable {default})
In Reliable mode any data transfer resets timer.
In Normal mode only sent data resets timer.
S31 Bit Mapped Options
Bit(Dec)
0 (1) Reserved
1 (2) Auto Mode Selection
0 Disabled (N0)
1 Enabled (N1 default)
2 (4), 3 (8) Error Correction Result Code (Wn)
0,0 DTE Speed only (W0 default)
1,0 Full Reporting (W1)
0,1 DCE Speed only (W2)
4 (16) Reserved
5 (32) Reserved
6 (64) Reserved
7 (128) Reserved
S32 XON Charactor (0-255, Default 17)
S33 XOFF Charactor (0-255, Default 19)
S36 Negotiation Failure Treatment (0-7 7 is default)
Fallback options when S48=128 or error correction link fails:
0 Disconnect
1 Establish Direct connection
2 Undefined
3 Establish Normal connection
4 Establish a MNP connection if possible, else Disconnect
5 Establish a MNP connection if possible, else Direct connection
6 Undefined
7 Establish a MNP connection if possible, else Normal connection
S37 Forced Single Carrier Rate (0-1,5-12 0 is default)
0 Carrier Rate at the rate the last AT command was issued.
(If rate is above highest carrier rate, then the highest
carrier rate the modem supports is used.)
1 300 bps
2-4 Undefined
5 1200 bps
6 2400 bps
7 1200/75 bps (v.23 mode)
8 4800 bps
9 9600 bps
10 12000 bps
11 14400 bps
12 7200 bps
S38 Delay Before Forced Disconnect (0-255 seconds, default 20)
0-254 Delay in seconds from H command, or DTR toggle ON or OFF (if
modem is set to follow DTR), before modem disconnects.
255 Modem send data out of buffer until completed or connection
is lost.
S40 Bit Mapped Option Status Codes
Bit(Dec)
0 (1) MNP Extended Services (-Kn)
0 Disable (-K0)
1 Enable (-K1)
1 (2) Power Level Adj. for Cellular Use [)Mn]
0 Auto Adj. [)M0 default
1 Force Adj. [)M1]
2 (4) MNP Link negotiation speed (*Hn)
0 At highest rate (*H0 default)
1 At 1200 bps (*H1)
3 (8), 4 (16), & 5 (32) Break Handling (\Kn)
0,0,0 \K0
1,0,0 \K1
0,1,0 \K2
1,1,0 \K3
0,0,1 \K4
1,0,1 \K5
6 (64) & 7 (128) MNP Block size (\An)
0,0 64 (\A0)
1,0 128 (\A1)
0,1 196 (\A2)
1,1 256 (\A3)
S41 Bit Mapped Option Status Codes
Bit(Dec)
0 (1) & 1 (2) Compression Selection (%Cn)
0,0 Disabled (%C0)
1,0 MNP 5 (%C1)
0,1 V.42bis (%C2)
1,1 MNP 5 & V.42bis (%C3)
2 (4) Auto Retrain (%En)
0 Disable (%E0 default)
1 Enable (%E1)
3 (8) Modem to Modem Flow Control (\Gn)
0 Disable (\G0 default)
1 Enable (\G1)
4 (16) Block mode control (\Ln)
0 Stream (\L0 default)
1 Block (\L1)
5 (32) Reserved
6 (64) Reserved
7 (128) Reserved
S46 Protocol Selection (136 or 138) (Affects v.42/v.42bis mode)
136 Disable Compression
138 Enable Compression (default)
S48 v.42 Negotiation (0,7,128)
0 Disable Negotiation, proceed with LAPM
7 Enable Negotiation (default)
128 Disable Negotiation, fallback per S36 setting
S80 Enhanced Features (Bit Mapped Options)
Bit (Decimal)
0 (1) Enable Access to functions in bits 1-7 of S80
1 (2) Sync Clock Source
2 (4) Sync Clock source
3 (8) DTR/DSR always on
4 (16) Enable lease line mode (If hardware supports)
5 (32) Enable V.25bis codes
6 (64) Enable remote configuation
7 (128) Enable passwd/callback
S82 LAPM Break Handling Options (3,7,128)
3 Expedited: Modem sends break immediately & data integrity is
maintained before and after break.
7 Destructive: Modem sends break immediately & data being
processed by each modem at that time is destroyed.
128 In sequence: Modem sends break in sequence with transmitted
data & data integrity is maintained before and after
the break
S86 Report Connection Failure Cause Code
0 Normal disconnect
1-3 Undefined Error Code
4 Carrier loss
5 No error correction at other end
6 No response to feature negotiation
7 This modem is ASYNC only, other is SYNC
8 No framing technique in common
9 No protocol in common
10 Bad response to feature negotiation
11 No sync information from remote
12 Normal hangup initiated by remote
13 Retransmission limit reached
14 Protocol violation occured
15-255 Undefined Error Code
S95 Extended Result Code Control (default sum is 0)
Each bit set high in this register enables the corresponding result
code regardless of the W command setting.
Bit (Decimal Value)
0 (1) CONNECT XXXX result code gives DCE to DCE rate instead of
local DTE to DCE rate.
1 (2) Append /ARQ to verbose CONNECT result code if protocol is NONE
2 (4) Enable CARRIER XXXX result code
3 (8) Enable PROTOCOL XXXX result code
4 (16) Undefined
5 (32) Enable COMPRESSION result code
6 (64) Undefined
7 (128) Undefined
S109 v.32/v.32bis Negotiation Rate Selection (default sum is 62)
Each bit set high in this register enables the corresponding rate as
a valid rate to be used during rate negotiation.
Bit (Decimal Value)
0 (1) Unused
1 (2) 4800 bps
2 (4) 7200 bps
3 (8) 9600 bps
4 (16) 12000 bps
5 (32) 14400 bps
6 (64) Unused
7 (128) Unused
S110 v.32/v.32bis Mode & Rate Negotiation Control
0 Normal v.32 mode (no v.32bis support)
1 Normal v.32bis mode
2 v.32bis mode with automatic rate renegotiation (default)
3 v.32bis mode with automatic rate renegotiation starting with
the lowest rate set in S109 and working up one defined rate at
a time toward the highest rate set in S109 (based on %Q level
at each rate prior to stepping up.) (If the modem steps back
down, it will also follow the S109 settings.)
S202 Remote Access Escape Charactor (0-255, Default 170)
SCn=n BUSY Detect Watermark Controls
Each register "pair" holds the value for each setting. To set a value,
divide the setting by 256. The integer goes in the second register,
while the remained goes in the first. (A setting of 516 would convert
to 2 Remainder 4, and could be set by sending ATSC0=4SC1=2 to the
modem.) Settings are in 1/100ths of a second.
Default values:
Minimum BUSY ON Time
SC0=30
SC1=0
Maximum BUSY ON Time
SC2=75
SC3=0
Minimum BUSY OFF Time
SC4=30
SC5=0
Maximum BUSY OFF Time
SC6=75
SC7=0
(Defaults support FCC Spec. BUSY signal. Setting SC0=25 & SC4=25
allows FAST BUSY to also be detected as BUSY.)
SC8=n Set number of valid BUSY Pulses before reporting BUSY (4 is default)
FAX commands of special interest to Supra Users:
+FAE=n (CLASS 1 Only) Adaptive Answer / Silent Answer Mode Control
0 Disable Both
1 Adaptive Answer ONLY
2 Adaptive Answer & Silent Answer
3 Silent Answer ONLY
+FAA=n (CLASS 2 Only) Adaptive Answer / Silent Answer Mode Control
0 Disable Both
1 Adaptive Answer ONLY
2 Adaptive Answer & Silent Answer
3 Silent Answer ONLY
Connection Result Codes:
Numeric Verbose
0 OK
1 CONNECT (300 bps)
2 RING
3 NO CARRIER
4 ERROR
5 CONNECT 1200
6 NO DIALTONE
7 BUSY
8 NO ANSWER
9 CONNECT 0600
10 CONNECT 2400
11 CONNECT 4800
12 CONNECT 9600
13 CONNECT 7200
14 CONNECT 12000
15 CONNECT 14400
16 CONNECT 19200
17 CONNECT 38400
18 CONNECT 57600
19 CONNECT 115200 (Not Currently Supported on MOST models)
22 CONNECT 1200/75 (Models with v.23 support only)
23 CONNECT 75/1200 (Models with v.23 support only)
24 DELAYED
32 BLACKLISTED
33 FAX
35 DATA
40 CARRIER 300
44 CARRIER 1200/75 (Models with v.23 support only)
45 CARRIER 75/1200 (Models with v.23 support only)
46 CARRIER 1200
47 CARRIER 2400
48 CARRIER 4800
49 CARRIER 7200
50 CARRIER 9600
51 CARRIER 12000
52 CARRIER 14400
66 COMPRESSION: CLASS 5 (MNP 5)
67 COMPRESSION: V.42BIS (BTLZ)
69 COMPRESSION: NONE
70 PROTOCOL: NONE
77 PROTOCOL: LAP-M (V.42)
80 PROTOCOL: ALT (MNP)
81 PROTOCOL: ALT-CELLULAR (MNP 10)
+FC +FCERROR
V.32 & V.32BIS EXTERNAL DISPLAY CODES
Red LED's
OH Off Hook
RD Receiving Data
SD Sending Data
TR Terminal Ready (Follows DTR per &Dn setting)
Green LED Display PANEL
AA Auto Answer (RI displayed during ring)
CD Carrier Detected
DC Data Compression in use
DI Dialing
FX FAX MODE
LP LAPM Error Correction in use.
M2 MNP2 Error Correction in use.
M3 MNP3 Error Correction in use.
M4 MNP4 Error Correction in use.
M5 MNP5 Data Compression in use.
OK Modem Powered Up Correctly and Ready for Use.
RE Receive Error while using LAPM or MNP mode.
RI Ring Indicator
RT Retrain in progress
TE Transmit Error while using LPAM or MNP mode.
TM Test Mode in use.
3 300 bps connection
12 1200 bps connection
24 2400 bps connection
48 4800 bps connection
72 7200 bps connection
96 9600 bps connection
120 12000 bps connection
144 14400 bps connection
Encoded Optional Feature List (ATi10)
Code Feature Added AT Commands & Result Codes
101 Fax CLASS 1 Normal CLASS 1 Command Set
104 Fax CLASS 2 Normal CLASS 2 Command Set
105 Fax CLASS 2.0 Normal CLASS 2.0 Command Set
115 CCITT v.17 (14.4 Fax) See Above
120 Worldwide PSTN Support %TTnn PTT Cert. Test Signals
*NC? Display Country Config.
*NCn Change County Config.
*Zn
121 CCITT v.23 %Fn (1-3)
%F1 75T/1200R
%F2 1200R/75T
%F3 v.23 HALF DUPLEX
Adds These Result Codes:
Numeric Verbose
22 CONNECT 1200TX/75RX
23 CONNECT 75TX/1200RX
44 CARRIER 1200/75
45 CARRIER 75/1200
122 CCITT v.25 See Software Doc.s
123 Blacklisting *B Display Blacklisted #'s
*D Display Delayed #'s
Adds These Result Codes:
24 DELAYED
32 BLACKLISTED
124 Access Security *C Enb. Sec. Acc. & Req.PW
*E Exit Sec. Access
*L List PW & CB directories
*P Stores PassWords
*R Request Sec. Acc. Mode
140 CCITT v.32bis (14.4 Data) See Above
141 Silent Answer See Above
142 Caller ID See Above
143 MNP 10 -B Forced FB to 1200
-C MNP10 Sync Mode
-C1 MNP10 Async Mode
-C2 MNP 2
-C3 MNP 3
-K No LAPM to MNP10 Conv.
-K1 Conv. LAPM to MNP10
-Q FB to v.22/v.22bis
-Q1 No FB to v.22/v.22bis
-Un Tx Level Change during FF
-U0 auto attn to -10dBm
-U1 auto attn to -18dBm
-U2 auto attn to -22dBm
-U3 auto attn to -25dBm
-U4 Force 2400 to -10dBm
-U5 Force 2400 to -18dBm
-U6 Force 2400 to -22dBm
-U7 Force 2400 to -25dBm
)M Tx fixed at -10dBm
)M1 Tx attempt Tx < -10dBm
*H0 Link Neg. at Top Speed
*H1 Link Neg. at 1200
*H2 Link Neg. at 4800
144 MNP "Cellular"
145 AutoSync
146 Enhanced Configuration Display \S Enhanced Display Codes
160 Voice Processing In Upgrade Doc. for Option
