Acer EXTENSA-7X0 Annexe 1
Advanced Data Addendum
December 4, 1996
MTC Data/FAX AT Command Set
Contents Page
Introduction ..................................................................1
AT Commands Reference ...........................................2
AT Commands For Testing and Debugging ..............16
AT Commands Reference S-Registers......................17
AT Command Set Result Codes................................22
AT FAX Command Set...............................................24
AT FAX Commands Reference .................................25
Introduction
This document specifies the Lucent Technologies MTC
Data/FAX AT Command Set.
The commands listed all conform to the TIA/EIA-602
standard for Data and TIA/EIA-578 Class 1 Fax
standard.
MTC Data/FAX Advanced Data Addendum
AT Command Set December 4, 1996
AT Commands Reference
AT commands are issued to the modem to control the modem's operation and software configuration. AT
commands can only be entered while the modem is in command mode. The format for entering AT commands is:
TYPE: ATXn
where X is the AT command, and n is the specific value for that command.
PRESS: Enter
Any command issued is acknowledged with a response in either text or numeric values known as result codes.
Table 2 lists all the valid result codes.
In the following listing, all commands and command-values accepted by the modem are shown; any entries other
than those shown cause the ERROR result code.
+++ Escape sequence
The escape sequence allows the modem to exit data mode and enter on-line command mode. While in on-line
command mode, you may communicate directly to your modem using AT commands. Once you are finished, you
may return to data mode using the ATO command.
A pause, the length which is set by the Escape Guard Time (S12), must be used after an escape sequence is
issued. This pause prevents the modem from interpreting the escape sequence as data.
The value of the escape sequence character may be changed using Register S2.
A/ Repeat Last Command
This command repeats the last command string entered. Do not precede this command with an AT prefix or
conclude it by pressing Enter.
A Answer Command
This command instructs the modem to go off-hook and answer an incoming call.
Bn Communication Standard Setting
This command determines CCITT vs. Bell standard.
B0: Selects CCITT V.22 mode when the modem is at 1200 bits/s.
B1: Selects Bell 212A when the modem is at 1200 bits/s (default).
B2: Unselects V23 reverse channel ( same as B3 ).
B3: Unselects V23 reverse channel ( same as B2 ).
B15: Selects V.21 when the modem is at 300 bits/s.
B16: Selects Bell 103J when the modem is at 300 bits/s (default).
Result Codes:
OK n = 0, 1, 15, 16
ERROR Otherwise
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AT Commands Reference
Cn Carrier Control
The modem will accept the C1 command without error in order to assure backward compatibility with
communications software that issues the C1 command. However, this modem does not support the C0 command.
The C0 command may instruct some other modems to not send carrier (i.e., it puts them in a receive-only mode).
C0: Transmit carrier always off.
C1: Normal transmit carrier switching.
Result Codes:
OK n = 1
ERROR Otherwise
Dn Dial
This command instructs the modem to begin the dialing sequence. The dial string (n, including modifiers and the
telephone number) is entered after the ATD command.
A dial string can be up to 40 characters long. Any digit or symbol (09, *, #, A, B, C, D) may be dialed as touchtone digits. Characters such as spaces, hyphens, and parentheses do not countthey are ignored by the modem
and may be included in the dial string to enhance readability.
The following may be used as dial string modifiers:
L Redials last number. Should be the first character following ATD, ignored otherwise.
P Pulse dialing.
T Touch-tone dialing (default).
, Pause during dialing. Pause for time specified in Register S8 before processing the next character
in the dial string.
W Wait for dial tone. Modem waits for a second dial tone before processing the dial string.
V The modem switches to speakerphone mode and dials the number. An ATH command may be used to
disconnect the voice call.
@ Wait for quiet answer. Wait for five seconds of silence after dialing the number. If silence is not
detected, the modem sends a NO ANSWER result code back to the user.
! Hook flash. Causes the modem to go on-hook for 0.5 seconds and then return to off-hook.
; Return to command mode. Causes the modem to return to command mode after dialing the number,
without disconnecting the call.
^ Disable data calling tone transmission.
S=n Dial a telephone number previously stored using the &Zn=x command (see the &Zn=x command for
further information). The range of n is 0—3.
$ Bong tone detection.
(continued)
En Echo Command
This command controls whether or not the characters entered from your computer keyboard are echoed back to
your monitor while the modem is in command mode.
E0: Disables echo to the computer.
E1: Enables echo to the computer (default).
Result Codes:
OK n = 0, 1
ERROR Otherwise
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AT Commands Reference
Fn Online Data Character Echo Command
This command determines if the modem will echo data from the DTE. This modem does not support the F0
version of the command. However, the modem will accept F1, which may be issued by older communication
software, to assure backward compatibility.
F0: Online data character echo enabled (NOT SUPPORTED, ERROR).
F1: Online character echo disabled.
Result Codes:
OK n = 1
ERROR Otherwise
Hn Hook Control
This command instructs the modem to go on-hook to disconnect a call, or off-hook to make the phone line busy.
H0: Modem goes on-hook (default).
H1: Modem goes off-hook.
Result Codes:
OK n = 0, 1
ERROR Otherwise
(continued)
In Request ID Information
This command displays specific product information about the modem.
I0: Returns default speed and controller firmware version. (same as I3)
I1: Calculates ROM checksum and displays it on the DTE (e.g., 12AB).
I2: Performs a ROM check and calculates and verifies the checksum displaying OK or ERROR.
I3: Returns the default speed and the controller firmware version. (same as I0)
I4: Returns firmware version for data pump (e.g., 94).
I5: Returns the board ID: software version, hardware version, and country ID (e.g., ?????????)
I9: Returns country code (e.g., NA Ver. 1).
Result Codes:
OK n = 0—9
ERROR Otherwise
Ln Monitor Speaker Volume
This command sets speaker volume to low, medium, or high.
L0: Selects low volume.
L1: Selects low volume.
L2: Selects medium volume (default).
L3: Selects high volume.
Result Codes:
OK n = 0, 1, 2, 3
ERROR Otherwise
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AT Commands Reference
Mn Monitor Speaker Mode
This command turns the speaker on or off.
M0: The speaker is off.
M1: The speaker is on until the modem detects the carrier signal (default).
M2: The speaker is always on when modem is off-hook.
M3: The speaker is on until the carrier is detected, except while dialing.
Result Codes:
OK n = 0, 1, 2, 3
ERROR Otherwise
Nn Modulation Handshake
This command controls whether or not the local modem performs a negotiated handshake at connection time with
the remote modem when the communication speed of the two modems is different.
N0: When originating or answering, this is for handshake only at the communication standard specified
by S37 and the ATB command.
N1: When originating or answering, begin the handshake only at the communication standard
specified by S37 and the ATB command. During handshake, fallback to a lower speed may occur
(default).
Result Codes:
(continued)
OK n = 0, 1
ERROR Otherwise
On Return On-line to Data Mode
O0: Instructs the modem to exit on-line command mode and return to data mode
(see AT Escape Sequence, +++).
O1: This command issues a retrain before returning to on-line data mode.
O3: This command issues a rate renegotiation before returning to on-line data mode.
Result Codes:
OK n = 0, 1, 3
ERROR Otherwise
P Select Pulse Dialing
This command configures the modem for pulse (non touch-tone) dialing. Dialed digits are pulsed until a T
command or dial modifier is received. Tone dial is the default setting.
Qn Result Code Control
Result codes are informational messages sent from the modem and displayed on your monitor. Basic result
codes are OK, CONNECT, RING, NO CARRIER, and ERROR. The ATQ command allows the user to turn result
codes on or off.
Q0: Enables modem to send result codes to the computer (default).
Q1: Disables modem from sending result codes to the computer.
Result Codes:
OK n = 0, 1
ERROR Otherwise
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AT Commands Reference
T Select Tone Dialing
This command instructs the modem to send DTMF tones while dialing. Dialed digits are tone dialed until a P
command or dial modifier is received. This is the default setting.
Vn DCE Response Format
This command controls whether result codes (including call progress and negotiation progress messages) are
displayed as words or their numeric equivalents.
V0: Displays result codes as digits.
V1: Displays result codes as text (default).
Result Codes:
OK n = 0, 1
ERROR Otherwise
ATV0 ATV1
Result Code Format <numeric code><CR> <CR><LF>
Wn Result Code Option
(continued)
<verbose code><CR><LF>
W0: CONNECT result code reports DTE speed. Disable protocol result codes.
W1: CONNECT result code reports DTE speed. Enable protocol result codes.
W2: CONNECT result code reports DCE speed. Enable protocol result codes (default).
Result Codes:
OK n = 0, 1, 2
ERROR Otherwise
Xn Result Code Selection and Call Progress Monitoring
This command enables tone detection options used in the dialing process. As these functions are chosen, the
modem chip set’s result codes are also affected. Therefore, this command is frequently used to control the
modem chip set’s responses. The primary function of this control is to control the modem chip set’s call response
capabilities.
Ext. Result Code Dial Tone Detect Busy Tone Detect
X0 Disable Disable Disable
X1 Enable Disable Disable
X2 Enable Enable Disable
X3 Enable Disable Enable
X4 Enable Enable Enable (default)
X5 Enable Enable Enable
X6 Enable Enable Enable
X7 Disable Enable Enable
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AT Commands Reference
Extended Result Codes
Disabled: Displays only the basic result codes OK, CONNECT, RING, NO CARRIER, and ERROR.
Enabled: Displays basic result codes, along with the connect message and the modem's date rate,
and an indication of the modem's error correction and data compression operation.
Dial Tone Detect
Disabled: The modem dials a call regardless of whether it detects a dial tone. The period of time the
modem waits before dialing is specified in register S6.
Enabled: The modem dials only upon detection of a dial tone, and disconnects the call if the dial tone
is not detected within 10 seconds.
Busy Tone Detect
Disabled: The modem ignores any busy tones it receives.
Enabled: The modem monitors for busy tones.
Result Codes:
OK n = 0, 1, 2, 3, 4, 5, 6, 7
ERROR Otherwise
Yn Long Space Disconnect
Long space disconnect is always disabled.
(continued)
Y0: Disable long space disconnect (default).
Y1: Enable long space disconnect. NOT SUPPORTED.
Result Codes:
OK n = 0
ERROR Otherwise
Zn Recall Stored Profile
This command instructs the modem chip set to go on-hook and restore the profile saved by the last &W command.
Either Z0 or Z1 restores the same single profile.
Result Codes:
OK n = 0, 1
ERROR Otherwise
&Bn V.32 Auto Retrain
This modem always auto retrains.
&B0: Disable V.32 auto retrain — NOT SUPPORTED.
&B1: Enable V.32 auto retrain (default).
Result Codes:
OK n = 1
ERROR Otherwise
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AT Commands Reference
&Cn Data Carrier Detect (DCD) Control
Data Carrier Detect is a signal from the modem to your computer indicating that the carrier signal is being received
from a remote modem. DCD normally turns off when the modem no longer detects the carrier signal.
&C0: The state of the carrier from the remote modem is ignored. DCD circuit is always on.
&C1: DCD turns on when the remote modem's carrier signal is detected, and off when the carrier signal
is not detected (default).
Result Codes:
OK n = 0, 1
ERROR Otherwise
&Dn DTR Control
This command interprets how the modem responds to the state of the DTR signal and changes to the DTR signal.
&D0: Ignore. The modem ignores the true status of DTR and treats it as always on. This should only be
used if your computer does not provide DTR to the modem.
&D1: If the DTR signal is not detected while in on-line data mode, the modem enters command mode,
issues OK result code, and remains connected.
&D2: If the DTR signal is not detected while in on-line data mode, the modem disconnects (default).
&D3: Monitor DTR signal when an on-to-off transition occurs, the modem performs a soft reset as if the ATZ
command was received.
(continued)
Result Codes:
OK n = 0, 1, 2, 3
ERROR Otherwise
&Fn Load Factory Settings
This command loads the configuration stored and programmed at the factory. This operation replaces all of the
command options and the S-register settings in the active configuration with factory values.
Note: In voice mode (AT+FCLASS=8), if this command is placed on the same line as other commands, the
command is ignored. In voice mode, to load factory settings, this command must be issued by itself.
&F0: Recall factory setting as active configuration.
The following command is for testing purposes only.
&F5: Recall factory settings appropriate for ETC mode as active configuration.
Result Codes:
OK n = 0, 5
ERROR Otherwise
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AT Commands Reference
&Gn V.22bis Guard Tone Control
This command determines which guard tone, if any, to transmit while transmitting in the high band (answer mode).
This command is only used in V.22 and V.22bis mode. This option is not used in North America and is for
international use only.
&G0: Guard tone disabled (default).
&G1: Sets guard tone to 550 Hz.
&G2: Sets guard tone to 1800 Hz.
Result Codes:
OK n = 0, 1, 2
ERROR Otherwise
&Jn Auxiliary Relay option
&J0: The auxiliary relay is never closed.
&J1: NOT SUPPORTED, responds ERROR.
Result Codes:
OK n = 0
ERROR Otherwise
(continued)
&Kn Local Flow Control Selection
&K0: Disable flow control.
&K1: Reserved.
&K2: Reserved.
&K3: Enable RTS/CTS flow control (default).
&K4: Enable XON/XOFF flow control.
Result Codes:
OK n = 0, 3, 4
ERROR Otherwise
&Mn Asynchronous Communications Mode
&M0: Asynchronous mode (default).
&M1: Reserved.
&M2: Reserved.
&M3: Reserved.
&M4: Reserved.
Result Codes:
OK n = 0
ERROR Otherwise
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