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 (09, *, #, A, B, C, D) may be dialed as touch­tone digits. Characters such as spaces, hyphens, and parentheses do not countthey 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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AT Commands Reference

&Pn Pulse Dial Make-to-Break Ratio Selection

This command is effective only for Japan.

&P0: 34/66 make/break ratio (10 pps) (default).
&P1: 34/66 make/break ration (20 pps).

Result Codes:

OK n = 0, 1
ERROR Otherwise

&Qn Asynchronous Communications Mode

&Q0: Asynchronous Mode, buffered.
&Q1: Reserved.
&Q2: Reserved.
&Q3: Reserved.
&Q4: Reserved.
&Q5: Error Control Mode, buffered (default).
&Q6: Asynchronous Mode, buffered.
&Q7: Reserved.
&Q8:

fallback according to the current user setting in S36.

&Q9: V.42 or

fallback according to the current user setting in S36.

MNP

error control mode. If an

MNP

error control mode. If neither error control protocol is established, the modem will

(continued)

Same as \N0.

Same as \N0.

MNP

Same as \N3

error control protocol is not established, the modem will

Result Codes:

OK n = 0, 5, 6, 8 ,9
ERROR Otherwise

&Sn Data Set Ready (DSR) Option

This command selects DSR action.

&S0: DSR always ON (default).
&S1: DSR comes on when establishing a connection and goes off when the connection ends.

Result Codes:

OK n = 0, 1
ERROR Otherwise

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&Tn Self-Test Commands

This command allows the user to perform diagnostic tests on the modem. These tests can help to isolate
problems when experiencing periodic data loss or random errors.

&T0 Abort. Stops any test in progress.
&T1 Local analog loop. This test verifies modem operation, as well as the connection between the

modem and computer. Any data entered at the local DTE is modulated, then demodulated, and

returned to the local DTE. To work properly, the modem must be off-line.
&T3 Local digital loopback test.
&T6 Remote digital loopback test. This test can verify the integrity of the local modem, the

communications link, and the remote modem. Any data entered at the local DTE is sent to, and

returned from, the remote modem. To work properly, the modems must be on-line with error

control disabled.

Result Codes:

OK n = 0
CONNECT n = 1, 3, 6
ERROR Otherwise

&V View Active Configuration and Stored Profile

This command is used to display the active profiles.

(continued)

&V0: View active file

For example:

Selection AT Cmd

Option
Comm Standard Bell B

CommandCharEcho Enable E
Speaker Volume Medium L
Speaker Control OnUntilCarrier M
Result Codes Enable Q
Dialer Type Tone T/P
ResultCode Form Text V
DialTone Detect Enable X
BusyTone Detect Enable X
LSD Action Standard RS232 &C
DTR Action Standard RS232 &D

Press any key to continue; ESC to quit.

Selection AT Cmd

Option
V22b Guard Tone Disable &G

Flow Control Hardware &K
Error Control Mode V42, MNP, Buffer \N
Data Compression Enable %C
AutoAnswerRing# 0 S0
AT Escape Char 43 S2
CarriageReturn Char 13 S3
Linefeed Char 10 S4
Backspace Char 8 S5
Blind Dial Pause 2 sec S6
NoAnswer Timeout 50 sec S7

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AT Commands Reference

“,“ Pause Time 2 sec S8

Press any key to continue; ESC to quit.

Option

Selection AT Cmd

No Carrier Disc 2000 msec S10
DTMF Dial Speed 95 msec S11
Escape GuardTime 1000 msec S12
Data Calling Tone Disabled S35
Line Rate 33600 S37
DSVD mode Disabled -SSE

Press any key to continue; ESC to quit.

Stored Phone Numbers
&Z0=
&Z1=
&Z2=
&Z3=

OK

&Wn Store Current Configuration

(continued)

This command stores certain command options and S-register values into the modem’s nonvolatile memory. The
ATZ command or a power-up reset of the modem restores this profile.

Result Codes:

OK n = 0
ERROR Otherwise

&Yn Select Stored Profile for Hard Reset

This command does not change the behavior of the modem but is included for compatibility with applications that
issue the &Y0 command

&Y0: Select stored profile 0 on power-up
&Y1: ERROR.

Result Codes:

OK n = 0
ERROR Otherwise

&Zn=x Store Telephone Number

This command is used to store up to four dialing strings in the modem’s nonvolatile memory for later dialing. The
format for the command is &Zn = ”stored number” where n is the location 0—3 to which the number should be
written. The dial string may contain up to 40 characters. The ATDS = n command dials using the string stored in
location n.

Result Codes:

OK n = 0, 1, 2, 3
ERROR Otherwise

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\G Modem Port Flow Control

\G0: Returns an “OK” for compatibility (default).
\G1: NOT SUPPORTED responds ERROR.

Result Codes:

OK n = 0
ERROR Otherwise

\J Adjust Bits/s Rate COntrol

When this feature is enabled, the modem emulates the behavior of modems that force the DTE interface to the line
speed.

\J0: Turn off feature (default).
\J1: Turn on feature.

Result Codes:

OK n = 0, 1
ERROR Otherwise

\K Set Break Control

(continued)

This command determines how the modem processes a Break signal received from the local DTE during a
connection (online).

\K0: Reserved, returns ERROR.
\K1: Reserved, returns ERROR.
\K2: Reserved, returns ERROR.
\K3: Reserved, returns ERROR.
\K4: Reserved, returns ERROR.
\K5: Modem sends the break to the remote modem in sequence with the transmitted data, non-

destructive/non-expedited (default).

Result Codes:

OK n = 5
ERROR Otherwise

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AT Commands Reference

\Nn Error Control Mode Selection

This command determines the type of error control used by the modem when sending or receiving data.

\N0: Buffer mode. No error control (same as &Q6).
\N1: Direct mode.
\N2:

\N3: V.42,

\N4: V.42 or disconnect. The modem attempts to connect in V.42 error control mode. If this fails, the call
\N5: V.42.

\N7: V.42.

Result Codes:

OK n = 0, 1, 2, 3, 4,5,7

\Q Local Flow Control Selection

\Q0: Disable flow control. Same as &K0.
\Q1: XON/XOFF software flow control. Same as &K4.
\Q2: CTS-only flow control. This is not supported and the response is ERROR.
\Q3: RTS/CTS to DTE (default). Same as &K3.

MNP

or disconnect mode. The modem attempts to connect using

procedures. If this fails, the modem disconnects. This is also known as

MNP,

or buffer (default).

The modem attempts to connect in V.42 error control mode. If this fails, the modem attempts to

MNP

connect in
is also known as V.42/

will be disconnected.

MNP
MNP

mode. If this fails, the modem connects in buffer mode and continues operation. This

or buffer (same as \N3).
or buffer (same as \N3).

(continued)

MNP

auto reliable mode (same as &Q5).

MNP

24 error control

MNP

reliable mode.

Result Codes:
OK n = 0, 1, 3

ERROR Otherwise

\Tn Inactivity Timer

This command specifies the length of time (in minutes) that the modem will wait before disconnecting when no
data is sent or received. A setting of zero disables the timer. Alternatively, this timer may be specified in register
S30. This function is only applicable to buffer mode.

Result Codes:

OK n = 0255

ERROR Otherwise

\Vn Protocol Result Code

\V0: Disable protocol result code appended to DCE speed.

\V1: Enable protocol result code appended to DCE speed (default).
Result Codes:
OK n = 0, 1

ERROR Otherwise

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AT Commands Reference

-Cn Data Calling Tone

Data Calling Tone is a tone of certain frequency and cadence as specified in V.25 which allows remote

Data/FAX/Voice discrimination. The frequency is 1300 Hz with a cadence of .5 s on and 2 s off.

-CO: Disabled (default).

-C1: Enabled.

Result Codes:

OK n = 0, 1
ERROR Otherwise

-SSE DSVD command

This command enables or disables DSVD (Digital Simultaneous Voice and Data).

-SSE = 0 Disabled (default)

-SSE = 1 Enabled

\Xn XON/XOFF Pass Through

\X0: Modem processes XON/XOFF flow control characters locally (DEFAULT).
\X1: NOT SUPPORTED responds ERROR.

(continued)

Result Codes:

OK n = 0
ERROR Otherwise

%B View Numbers in Blacklist

If blacklisting is in effect, this command displays the numbers for which the last call attempted in the past two

hours failed. The ERROR result code appears in countries that do not require blacklisting.

%Cn Data Compression Control

This command determines the operation of V.42bis and

take effect until a disconnect occurs first.

%C0: V.42bis/
%C1: V.42bis/

Result Codes:

OK n = 0, 1
ERROR Otherwise

MNP

5 disabled. No data compression.

MNP

5 enabled. Data compression enabled (default).

MNP

class 5 data compression. Online changes do not

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AT Commands For Testing and Debugging

The following commands are to be used for testing and debugging only and are not meant for general use.

&&C Write to/Read from DSP Register

AT&&C<loc>,<val> writes the value <val> to DSP register at location <loc>.
AT&&C<loc> reads from location <loc>.

&&L Line-to-Line Loopback

This command provides a loopback for line-to-line.

&&R Write to/Read from DSP RAM Location

AT&&R<loc>,<val> writes the value <val> to DSP RAM location <loc>.
AT&&R<loc> reads from location <loc>.

&&S Speaker Codec Loopback

This command provides a loopback from the microphone to the speaker.

The following command is for testing purposes only.

&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.

&F5: Recall factory settings appropriate for ETC mode as active configuration.

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AT Commands Reference S-Registers

S-registers generally affect how the AT commands perform. Contents of the registers can be displayed or

modified when the modem is in command mode.

To display the value of an S-register:

TYPE: ATSn? where n is the register number.
PRESS: Enter

To modify the value of an S-register:

TYPE: ATSn = r

where n is the register number, and r is the new register value.

PRESS: Enter

S0 Auto Answer Ring Number

This register determines the number of rings the modem will count before automatically answering a call. Enter 0

(zero) if you do not want the modem to automatically answer at all. When disabled, the modem can only answer

with an ATA command.

Range: 0—255
Default: 0
Units: rings

S1 Ring Counter

This register, Ring Counter, is read only. The value of S1 is incremented with each ring. If no rings occur over a

six second interval, this register is cleared.

Range: 0—255
Default: 0
Units: rings

S2 AT Escape Character (user defined)

This register determines the ASCII valued used for an escape sequence. The default is the + character. The

escape sequence allows the modem to exit data mode and enter command mode when on-line. Values greater

than 127 disable the escape sequence.

Range: 0—255
Default: 43
Units: ASCII

S3 Command Line Termination Character (user defined)

This register determines the ASCII values as the carriage return character. This character is used to end

command lines and result codes.

Range: 0—127, ASCII decimal
Default: 13 (carriage return)
Units: ASCII

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AT Commands Reference S-Registers

S4 Response Formatting Character (user defined)

This register determines the ASCII value used as the line feed character. The modem uses a line feed character
in command mode when it responds to the computer.

Range: 0—127, ASCII decimal
Default: 10 (line feed)
Units: ASCII

S5 Command Line Editing Character (user defined)

This register sets the character recognized as a backspace and pertains to asynchronous only. The modem will
not recognize the backspace character if it is set to a value that is greater than 32 ASCII. This character can be
used to edit a command line. When the echo command is enabled, the modem echoes back to the local DTE the
backspace character, an ASCII space character, and a second backspace character. This means a total of three
characters are transmitted each time the modem processes the backspace character.

Range: 0—32, 127
Default: 8 (backspace)
Units: ASCII

S6 Wait Before Dialing

(continued)

This register sets the length of time, in seconds, that the modem must wait (pause) after going off-hook before
dialing the first digit of the telephone number. The modem always pauses for a minimum of two seconds, even if
the value of S6 is less that two seconds. The wait for dial tone call progress feature (W dial modifier in the dial
string) will override the value in register S6. This operation, however, may be affected by some ATX options
according to country restrictions.

Range: 2—65
Default: 2
Units: seconds

S7 Connection Completion Time-Out

This register sets the time, in seconds, that the modem must wait before hanging up because carrier is not
detected. The timer is started when the modem finishes dialing (originate), or goes off-hook (answer). In originate
mode, the timer is reset upon detection of an answer tone if allowed by country restriction. The timer also
specifies the wait for silence time for the @ dial modifier in seconds. S7 is not associated with the W dial modifier.

Range: 1—255
Default: 50
Units: seconds

18 Lucent Technologies Inc.

Advanced Data Addendum AT&T MTC Data/FAX

December 4, 1996 AT Command Set

AT Commands Reference S-Registers

S8 Comma Dial Modifier Time

This register sets the time, in seconds, that the modem must pause when it encounters a comma (,) in the dial

command string.

Range: 0—65
Default: 2
Units: seconds

S10 Automatic Disconnect Delay

This register sets the length of time, in tenths of a second, that the modem waits before hanging up after a loss of

carrier. This allows for a temporary carrier loss without causing the local modem to disconnect.

The actual interval the modem waits before disconnecting is the value in register S10.

Range: 1—254
Default: 20
Units: .1 seconds

S11 DTMF Dialing Speed

This register determines the dialing speed which is prefixed for each country.

(continued)

Range: 50—150
Default: 95
Units: .001 seconds

S12 Escape Guard Time

This register sets the value (in 20 ms increments) for the required pause after the escape sequence (default 1 s).

Range: 0—255
Default: 50
Units: .02 seconds

S28 V.34 Modulation Enable/Disable

This register enables/disables V.34 modulation.

0 = disabled, 1—255 = enabled

Range: 0—255
Default: 1

Lucent Technologies Inc. 19

MTC Data/FAX Advanced Data Addendum
AT Command Set December 4, 1996

AT Commands Reference S-Registers

S30 Inactivity Timer

S30 specifies the length of time (in minutes) that the modem will wait before disconnecting when no data is sent or
received. This function is only applicable to buffer mode.

Range: 0—255
Default: 0
Units: minutes

S32 Synthetic Ring Volume

This register specifies a synthetic ring volume in dB with an implied minus sign.

Range:
Default: 16

S33 Synthetic Ring Frequency

This register specifies a synthetic ring frequency. Valid ranges are 0-5, with 0= disabled and 1-5 corresponding to
5 ring frequencies.

Range: 0-5
Default: 0

(continued)

S35 Data Calling Tone

Data Calling Tone is a tone of certain frequency and cadence as specified in V.25 which allows remote
Data/FAX/Voice discrimination. The frequency is 1300 Hz with a cadence of .5 s on and 2 s off.

0 = disabled, 1 = enabled

Range: 0—1
Default: 0

S36 Negotiation Fallback (default 7)

This register specifies the action to take in the event of negotiation failure when error control is selected.

S36 = 0, 2 Hang up.
S36 = 1, 3 Fall back to an asynchronous connection.
S36 = 4, 6 Attempt
S36 = 5, 7 Attempt

MNP
MNP

. If
. If

MNP

fails, hang up.

MNP

fails, fall back to asynchronous connection.

20 Lucent Technologies Inc.

Advanced Data Addendum AT&T MTC Data/FAX

December 4, 1996 AT Command Set

AT Commands Reference S-Registers

S37 Dial Line Rate (default 0)

S37 = 0 maximum modem speed
S37 = 1 reserved
S37 = 2 1200/75 bits/s
S37 = 3 300 bits/s
S37 =4 reserved
S37 = 5 1200 bits/s
S37 = 6 2400 bits/s
S37 =7 4800 bits/s
S37 = 8 7200 bits/s
S37 = 9 9600 bits/s
S37 = 10 12000 bits/s
S37 = 11 14400 bits/s
S37 = 12 16800 bits/s
S37 = 13 19200 bits/s
S37 = 14 21600 bits/s
S37 = 15 24000 bits/s
S37 = 16 26400 bits/s
S37 = 17 28800 bits/s
S37 = 18 31200 bits/s
S37 = 19 33600 bits/s

(continued)

S42 Auto Rate (default 1, range 0

1)

This command is used for testing and debugging only.

V.32bis and V.22bis auto rate is disabled. Retrain operation is disabled or enabled in data mode, and fallback is

disabled in data mode.

0 = auto rate disabled, 1 = enabled.

Range: 0—1
Default: 1

S43 Auto Mode (default 1, range 01)

This command is used for testing and debugging only.

V.32bis startup auto mode operation disabled.

0 = auto mode disabled, 1 = enabled.

Range: 0—1
Default: 1

Lucent Technologies Inc. 21

MTC Data/FAX Advanced Data Addendum
AT Command Set December 4, 1996

AT Commands Reference S-Registers

S48 LAPM Error Control and Feature Negotiation (default 7)

S48 = 7 Negotiation enabled.
S 48 = 128 Negotiation disabled; forces immediate fallback options specified in S36.

The following chart lists the S36 and S48 configuration settings necessary to negotiate certain types of
connections.

S48=7 S48 =128

S36 = 0, 2 LAPM or hangup do not use
S36 = 1, 3 LAPM or async async
S36 = 4, 6 LPAM,
S36 = 5, 7 LAPM,

S89 Timer to Control Sleep Mode

This command displays the number of seconds of inactivity (no characters sent from the DTE, no RING) in the off­line command state before the modem places itself into standby mode. A value of zero prevents standby mode.

Note:

standby will be 5 seconds. This is done for compatibility with previous products which allowed time-outs
down to 1 s.

If a number between 1 and 4 is entered for this register, it will set the value to 5, and the inactivity before

MNP
MNP

, or hangup
, or async

MNP
MNP

(continued)

or hangup
or async

Range: 0, 5—255
Default: 10

S90 Local Phone Status

This register tells the status of the Local Phone. It is read only.

0 = local phone on-hook
1 = local phone off-hook

S91 Line Transmit Level

This register is effective only for Japan. It specifies the line transmit level in dB with an implied minus sign.

Range: 6—15
Default: 15
Units: 1 dB

22 Lucent Technologies Inc.

Advanced Data Addendum AT&T MTC Data/FAX

December 4, 1996 AT Command Set

AT Command Set Result Codes

Table 2 shows the Result Codes.

Table 2. The Result Code Summary

Result Code Numeric Description

OK 0 Command executed
CONNECT 1 Modem connected to line
RING 2 A ring signal has been detected
NO CARRIER 3 Modem lost carrier signal, or does not detect carrier signal, or

does not detect answer tone
ERROR 4 Invalid command
CONNECT 1200 EC* 5 Connection at 1200 bits/s
NO DIALTONE 6 No dial tone detected
BUSY 7 Busy signal detected
NO ANSWER 8 No quiet answer
CONNECT 2400 EC* 10 Connection at 2400 bits/s
CONNECT 4800 EC* 11 Connection at 4800 bits/s
CONNECT 9600 EC* 12 Connection at 9600 bits/s
CONNECT 14400 EC* 13 Connection at 14400 bits/s
CONNECT 19200 EC* 14 Connection at 19200 bits/s
CONNECT 7200 EC* 24 Connection at 7200 bits/s
CONNECT 12000 EC* 25 Connection at 12000 bits/s
CONNECT 16800 EC* 86 Connection at 16800 bits/s
CONNECT 300 EC* 40 Connection at 300 bits/s
CONNECT 21600 EC* 55 Connection at 21600 bits/s
CONNECT 24000 EC* 56 Connection at 24000 bits/s
CONNECT 26400 EC* 57 Connection at 26400 bits/s
CONNECT 28800 EC* 58 Connection at 28800 bits/s
CONNECT 31200 EC* 59 Connection at 31200 bits/s
CONNECT 33600 EC* 60 Connection at 33600 bits/s
CONNECT 38400 EC* 28 Connection at 38400 bits/s
CONNECT 57600 EC* 18 Connection at 57600 bits/s
CONNECT 115200 EC 87 Connection at 115200 bits/s
DELAYED 88 Delay is in effect for the dialed number
BLACKLISTED 89 Dialed number is blacklisted
BLACKLIST FULL 90 Blacklist is full

* EC only appears when the Extended Result Codes configuration option is enabled. EC is replaced by one of the following symbols, depending upon the error

control method used:

V42bis—V.42 error control and V.42bis data compression.
V42—V.42 error control only.

5—

MNP
MNP

NoEC—No error control protocol.

class 4 error control and

MNP

4—

class 4 error control only.

MNP

class 5 data compression.

MNP

Lucent Technologies Inc. 23

MTC Data/FAX Advanced Data Addendum
AT Command Set December 4, 1996

AT FAX Command Set

Class 1 FAX Commands

The Lucent Technologies HSM Data/FAX Complete Chip Set supports FAX commands conforming to EIA
standard 578. These commands are given here with short descriptions; complete explanations are given in the
standard, available from the Electronic Industry Association.

The AT FAX Command Set Summary

Command Description

+FCLASS? Service class indication
+FCLASS = ? Service class capabilities
+FCLASS = n Service class selection

+FTS = <n> Transmission silence

+FRS = <n> Receive silence
+FTM = <m> Transmit FAX data with <m> carrier
+FRM = <m> Receive FAX data with <m> carrier

+FTH = <m> Transmit HDLC data with <m> carrier

+FRH = <m> Receive HDLC data with <m> carrier

+FTM = ? Transmit FAX modulation
+FRM = ? Receive FAX modulation
+FTH = ? Transmit HDLC Data modulation
+FRH = ? Receive HDLC Data modulation

+FMI = ? Manufacturer Identification
+FMM = ? Product Identification
+FMR = ? Version/Revision Information

Lucent Technologies Inc. 24

Advanced Data Addendum MTC Data/FAX
December 4, 1996 AT Command Set

AT FAX Commands Reference

+FCLASS? Service Class Indication

This command causes the modem to display the current setting. The modem can operate either as a Class 0 data
modem or a class 1 FAX modem.

Typical responses:

+FCLASS? 000 if in data mode; 001 if in FAX class 1, 008 if in voice mode, and 080 if in

VoiceView

†

mode.

+FCLASS=? Service Class Capabilities

This command causes the modem to display the classes it supports.

Typical responses:

+FCLASS = ? 0, 1, 8, 80

+FCLASS=n Service Class Selection

This command sets the modem for class n operation, where n is either a 0 or 1.

Parameters: 0, 1, 8, 80
Default: 0
Command options:

+FCLASS = 0 Select data mode.
+FCLASS = 1 Select Facsimile Class 1.
+FCLASS = 8 Select voice mode.
+FLCASS = 80 Select

VoiceView

mode.

+FTS=<n> Transmission Silence

†

VoiceView

This command causes the modem to stop transmitting data and pause for 10 * n ms. At the end of this period, the
modem then responds OK. You can specify any number from 0 through 255 as the value of n; for example, a
value of 5 specifies a period of 50 ms.

n = 0255 (10 ms intervals)

+FRS=<n> Receive Silence

This command causes the modem to listen and wait for a 10 * n ms period of silence on the line. At the end of this
period, the modem then responds OK. You can specify any number from 0 through 255 as the value of n; for
example, a value of 5 specifies a period of 50 ms.

n = 0255 (10 ms intervals)

is a registered trademark of Radish Communications Systems, Inc.

Lucent Technologies Inc. 25

MTC Data/FAX Advanced Data Addendum
AT Command Set December 4, 1996

AT FAX Commands Reference

+FTM=<m> Transmit FAX Data with <m> Carrier

This command causes the modem to transmit data at the modulation specified by <m>. The following table shows
the values you can enter for this command and the meaning of those values.

Command Option Modulation Speed (bits/s)

+FTM=3 V.21 Channel 2 300
+FTM=24 V.27ter 2400
+FTM=48 V.27ter 4800
+FTM=72 V.29 7200
+FTM=96 V.29 9600
+FTM=73 V.17 7200
+FTM=74 V.17 (short train) 7200
+FTM=97 V.17 9600
+FTM=98 V.17 (short train) 9600

+FTM=121 V.17 12000
+FTM=122 V.17 (short train) 12000
+FTM=145 V.17 14400
+FTM=146 V.17 (short train) 14400

(continued)

+FRM=<m> Receive FAX Data with <m> Carrier

This command causes the modem to receive data at the modulation specified by <m>.

Command Option Modulation Speed (bits/s)

+FRM=3 V.21 Channel 2 300
+FRM=24 V.27ter 2400
+FRM=48 V.27ter 4800
+FRM=72 V.29 7200
+FRM=96 V.29 9600
+FRM=73 V.17 7200
+FRM=74 V.17 (short train) 7200
+FRM=97 V.17 9600
+FRM=98 V.17 (short train) 9600

+FRM=121 V.17 12000
+FRM=122 V.17 (short train) 12000
+FRM=145 V.17 14400
+FRM=146 V.17 (short train) 14400

26 Lucent Technologies Inc.

Advanced Data Addendum MTC Data/FAX
December 4, 1996 AT Command Set

AT FAX Commands Reference

+FTH=<m> Transmit HDLC Data with <m> Carrier

This command causes the modem to transmit data framed in the HDLC protocol at the modulation specified
by <m>.

Command Option Modulation Speed (bits/s)

+FTH=3 V.21 Channel 2 300
+FTH=24 V.27ter 2400
+FTH=48 V.27ter 4800
+FTH=72 V.29 7200
+FTH=96 V.29 9600
+FTH=73 V.17 7200
+FTH=74 V.17 (short train) 7200
+FTH=97 V.17 9600
+FTH=98 V.17 (short train) 9600

+FTH=121 V.17 12000
+FTH=122 V.17 (short train) 12000
+FTH=145 V.17 14400
+FTH=146 V.17 (short train) 14400

(continued)

+FRH=<m> Receive HDLC Data with <m> Carrier

This command causes the modem to receive data framed in the HDLC protocol at the modulation specified
by <m>.

Command Option Modulation Speed (bits/s)

+FRH=3 V.21 Channel 2 300
+FRH=24 V.27ter 2400
+FRH=48 V.27ter 4800
+FRH=72 V.29 7200
+FRH=96 V.29 9600
+FRH=73 V.17 7200
+FRH=74 V.17 (short train) 7200
+FRH=97 V.17 9600
+FRH=98 V.17 (short train) 9600

+FRH=121 V.17 12000
+FRH=122 V.17 (short train) 12000
+FRH=145 V.17 14400
+FRH=146 V.17 (short train) 14400

Lucent Technologies Inc. 27

MTC Data/FAX Advanced Data Addendum
AT Command Set December 4, 1996

AT FAX Commands Reference

(continued)

Manufacturer Identification (+FMI?)

Read Syntax:

AT+FMI?

This parameter reports the manufacturer identification. Typically, the text shall consist of the name of the
manufacturer, but the manufacturer may choose to provide more information (e.g., address, telephone number for
customer service, etc.). The maximum text length is 80 characters. It is preferred that the first eight characters be
unique.

Product Identification (+FMM?)

Read Syntax:

AT+FMM?

This parameter reports product identification. Typically, the text shall consist of the name of the product. but the
manufacturer may choose to provide more information. The maximum text length is 80 characters. It is preferred
that the first eight characters be unique.

Version / Revision Information (+FMR?)

Read Syntax:

AT+FMR?

This parameter reports the version, revision level, or other pertinent information for the device. Typically, the text
shall consist of the version of the product, but the manufacturer may choose to provide more information (e.g.,
date code). The maximum text length is 80 characters. It is preferred that the first eight characters be unique.

Response Format (ATV)

Write Syntax:

ATV<value>

Valid Values: 0, 1
Default Value: 1

ATV0
ATV1

verbose

non-verbose

The setting of this parameter determines whether the result codes are transmitted in a numeric form or an
alphabetic (verbose) form. The following table shows the effect of the setting of this parameter on the format of
the result codes.

ATV0 ATV1

Result Code Format <numeric code><CR> <CR><LF>

<verbose code><CR><LF>

For additional information, contact your Lucent Technologies Account Manager or the following:

U.S.A.: Microelectronics, Lucent Technologies Inc., 555 Union Boulevard, Room 21Q-133BA, Allentown, PA 18103
ASIA PACIFIC: Microelectronics Asia/Pacific, Lucent Technologies Inc., 14 Science Park Drive, #03-02A/04 The Maxwell, Singapore 0511

JAPAN: Microelectronics, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan
For data requests in Europe:
For technical inquiries in Europe:

For technical inquires in Taiwan:

Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No
rights under any patent accompany the sale of any such product(s) or information.

Copyright  1996 Lucent Technologies Inc.
All Rights Reserved
Printed in U.S.A.

December 1996
DA95-001DMOD

1-800-372-2447

Tel. [phone],

LUCENT TECHNOLOGIES DATALINE:
CENTRAL EUROPE:

FRANCE:

Microelectronics, Lucent Technologies Taiwan Modem Design Center

(33) 1 47 67 47 67

, FAX [phone] (In Canada:

Tel. [phone],

(44) 89 95086 0

FAX [phone]

FAX [phone]

(Munich), NORTHERN EUROPE:

(Paris), SOUTHERN EUROPE:

1-800-553-2448

Tel. [phone],

, FAX [phone])

FAX [phone]

(44) 1344 865 900

(39) 2 6601 1800

(886) 2-547-7016

(Milan) or

(Bracknell UK),

(34) 1 807 1700

(Madrid)