Multitech MultiModem MT5656ZDX-V Manual de usuario

MultiModem



MT5600BA-V92

MT5600BR-V92

MT5656ZDX

MT5656ZDXV

AT Commands

Reference Guide

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 2

AT Commands Reference Guide

Products: MT5600BA-V92, MT5600BR-V92, MT5656ZDX, MT5656ZDX-V

PN S000273G

Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and specifically

disclaims any implied warranties of merchantability or fitness for any particular purpose. Furthermore, Multi-Tech

Systems, Inc. reserves the right to revise this publication and to make changes in the content hereof without

obligation of Multi-Tech Systems, Inc. to notify any person or organization of such revisions or changes.

Record of Revisions

Revision Date Description

D 12/13/04 Add note to synchronous clock that Synchronous Online (&M1) must be enabled before

you can set the synchronous clock. Updated voice commands. Add V.25bis commands.

E 05/18/06 Add MT5600BR-V92 as a model covered by this command guide. Removed MT5600BL

as a model covered in this manual; for MT5600BL, use Rev. D of this manual.

F 04/18/07 Updated the Technical Support contact list.

G 10/06/09 Changed range of +VGR to 0-255 with default at 128. Added &EN5 value to &EN Modem-

Initiated Flow Control. Note that L5 is not supported by the MT5656ZDX. Rewrite the

Escape directions on page 4 and 16 (changed ATH<CR> to AT<CR>).

Trademarks

MultiModemII, Multi-Tech, and the Multi-Tech logo are trademarks or registered trademarks of Multi-Tech Systems,

Inc. Other products or brands referenced in this publication are trademarks or registered trademarks of their

respective companies or corporations.

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Knowledge Base and Support Services www.multitech.com/en_US/SUPPORT

Technical Support

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Phone: 763-785-3500 or 800-328-9717

Fax: 763-785-9874

Table of Contents

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 3

Table of Contents

Chapter 1 – Introduction..............................................................................................................................................4

Chapter 2 – AT Commands .........................................................................................................................................5

General Commands...................................................................................................................................................5

Escape Commands..................................................................................................................................................16

Modem Connection Commands...............................................................................................................................17

Caller ID Commands................................................................................................................................................19

Callback Security Commands..................................................................................................................................19

Data Compression Commands................................................................................................................................20

Error Control Commands.........................................................................................................................................21

DTE Commands.......................................................................................................................................................23

Modulation Command..............................................................................................................................................24

Call Control Command.............................................................................................................................................25

Test Command.........................................................................................................................................................27

Chapter 3 – Voice Commands...................................................................................................................................28

Voice Commands Overview.....................................................................................................................................28

Configuration Commands.........................................................................................................................................28

Voice Commands.....................................................................................................................................................30

Speakerphone Commands.......................................................................................................................................37

Unformatted Form Reporting – Caller ID..................................................................................................................38

Voice Mode Shielded Codes....................................................................................................................................38

Chapter 4 – V.8 / V.8bis Commands.........................................................................................................................40

Chapter 5 – V.25bis Commands................................................................................................................................41

V.25bis Responses..................................................................................................................................................42

Chapter 6 – S-Registers.............................................................................................................................................43

S-Registers ..............................................................................................................................................................43

Chapter 7 – Result Codes..........................................................................................................................................46

Chapter 8 – Setting Country/Regional Codes..........................................................................................................51

Index............................................................................................................................................................................52

Chapter 1 – Introduction

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 4

Chapter 1 – Introduction

AT commands are used to control the operation of your modem. They are so called because each command must be

preceded by the characters AT to get the ATtention of the modem.

AT commands can be issued only when the modem is in command mode or online command mode.

•The modem is in command mode whenever it is not connected to another modem.

•The modem is in data mode whenever it is connected to another modem and ready to exchange data.

•Online command mode is a temporary state in which you can issue commands to the modem while

connected to another modem.

To put the modem into online command mode from data mode, you must issue an escape sequence: Type +++ and

wait for the OK response. Then issue the following command AT<CR>. <CR> indicates that you must click Enter).

To return to data mode from online command mode, type the command ATO.

To send AT commands to the modem you must use a communications program, such as PhoneTools, a

communications program included with your modem, or HyperTerminal in Windows 95, 98, NT 4.0, Me, 2000, XP.

You can issue commands to the modem either directly or by typing them in the terminal window of the

communications program. You issue them indirectly by configuring the operating system or communications program

to send the commands automatically. Fortunately, communications programs make daily operation of modems

effortless by hiding the commands from the user. Most users, therefore, need to use AT commands only when

reconfiguring the modem; e.g., to turn autoanswer on or off.

The format for entering an AT command is ATXn, where Xis the command and nis the value for the command,

sometimes called the command parameter. The value is always a number. If the value is zero, you can omit it from

the command. Thus, AT&W is equivalent to AT&W0.

Most commands have a default value, which is the value that is set at the factory. Default values are provided with

each command in the AT Commands section.

You must press Enter to send the command to the modem.

Any time the modem receives a command, it sends a response known as a result code. The most common result

codes are OK, ERROR, and CONNECT. For a table of valid result codes, see the “Result Codes” sections of this

manual.

You can issue several commands in one line, in what is called a command string.

The command string begins with AT and ends when you press Enter. Spaces to separate the commands are

optional; they are ignored by the command interpreter. The most familiar command string is the initialization string,

which is used to configure the modem when it is turned on or reset, or when your communications software calls

another modem.

Chapter 2 – AT Commands

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 5

Chapter 2 – AT Commands

General Commands

Command: AT Attention Code

Values: n/a

Description: The attention code precedes all command lines except A/ and the escape sequence.

Command: Enter Key

Values: na

Description: Press the ENTER or RETURN key to execute most commands.

Command: A Answer

Values: na

Description: Answers an incoming call before the final ring.

Command: A/ Repeat Last Command

Values: n/a

Description: Repeats the last command string. Do not precede this command with AT. Do not press

ENTER to execute.

Command: BnCommunication Standard Setting

Values: n = 0 or 1

Default: 1

Description: B0 Selects ITU-T V.22 mode when the modem is at 300 or 1200 bps.

B1 Selects Bell 212A when the modem is at 300 or 1200 bps.

Command: DsDial

Values: s = dial string (phone number and dial modifiers)

Default: none

Description: Dials telephone number s, where smay be up to 40 characters long and include the

following dial string modifiers.

0–9 Digits 0 through 9

*The “star” digit (tone dialing only)

#The “pound” digit (tone dialing only)

A–D A, B, C, D tone digits. Country specific; some countries may prohibit these digits.

LRedials last number. (Must be placed immediately after ATD.)

PSelects pulse-dialing until a Tis encountered. Affects current/subsequent dialing.

TSelect tone-dialing until a Pis encountered. Affects current/subsequent dialing.

WWait for a new dial tone before continuing to dial.(X2 or X4 must be selected.)

,Pause during dialing for time set in S-Register S8.

;Return to command mode after dialing. (Place at end of dial string.)

!Hook flash. Causes the modem to go quicking on-hook then back off-hook.

@Wait for silence. Causes the modem to wait for 5 seconds of silence before

processing the next part of the command. If silence is not detected within the

time set in S-Register S7, the modem returns a NO ANSWER or BUSY code.

^Toggle data calling tone on or off. Applies only to current dialing attempt.

&Detect credit card “bong” tone. If the tone is not detected within the time specified

by S7 (US models), the modem aborts the rest of the sequence and hangs up.

The character should follow the phone number and precede the user’s calling

card number; e.g., ATDT1028806127853500&123456789.

Chapter 2 – AT Commands

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 6

Command: DS=n Dial Stored Telephone Number

Values: n = 0–3

Default: none

Description: Dials a number previously stored in directory number n by the &Zn=xcommand.

Example: ATDS=3.

Command: EnEcho Command Mode Characters

Values: n = 0 or 1

Default: 1

Description: E0 Does not echo keyboard input to the terminal.

E1 Does echo keyboard input to the terminal.

Command: HnHook Control

Values: n = 0 or 1

Default: 0

Description: H0 Goes on-hook (hang up) and terminate any &T test in progress.

H1 Goes off-hook (make the phone line busy); enters command mode.

Command: InInformation Request

Values: n = 0–6

Default: None

Description: I0 Displays the product code. Example: MT5600BA-V92.

I1 Calculates ROM checksum; displays the least significant byte in decimal format.

I2 Calculates ROM checksum and compares it to the prestored checksum, displays

OK if they match or ERROR if they don’t match.

I3 Displays the firmware version and application codes.

I4 Displays the OEM-defined identifier string in either binary or ASCII format.

I5 Displays the regional or country code. Example: 098.

I6 Displays the modem data pump model and internal code version.

Command: L5 Lists Current Operating Parameters

Note: L5 is not supported by the MT5656ZDX. Use &V).

Value: 5

Default: None

Description: Displays the current values for the error correction, flow control, data compression, and

serial port speed commands. Example: atL5

&E2 &E3 &E15 $SB115200

Note: Use the &V command to display the other parameters.

Command: MnMonitor Speaker Mode

Values: n= 0, 1, 2, or 3

Default: 1

Description: M0 Speaker is always off.

M1 Speaker is on until the carrier signal is detected.

M2 Speaker is always on when the modem is off-hook.

M3 Speaker is off when receiving carrier and during dialing, but on during answering.

Command: OnReturn Online to Data Mode

Values: 0 or 1

Default: None

Description: O0 Exit online command mode and return to online data mode without a retrain.

Normally used after a +++ escape (see +++ escape sequence).

O1 Exit online command mode and return to online data mode after a retrain.

Command: P Pulse Dialing

Values: P,T

Default: T

Description: Forces pulse (non-touch-tone) dialing until a Tcommand or Tdial modifier is received.

Chapter 2 – AT Commands

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 7

Command: QnResult Codes Enable/Disable

Values: n = 0 or 1

Default: 0

Description:Q0 Enables result codes.

Q1 Disables result codes

Command: SrSelect Register

Values: ris the S-Register number

Default: None

Description: Selects register Sras the last register accessed; e.g., S0. The command AT? can then be

used to read the register, and the command AT=ncan then be used to set the register to

value n.

Command: Sr=n Set Register Value

Values: ris the S-Register number; nvaries

Default: None

Description: Sets value of register Srto n, where nis entered in decimal format; e.g., S0=1.

If the short form AT=nis used, the value is written to the last accessed S-Register.

Command: Sr? Read Register Value

Values: ris the S-Register number

Default: None

Description: Reads value of register Srand displays it in 3-digit decimal format. S2? gives the

response 043. If the short form AT? is used, the last accessed S-Register is read.

Command: T Tone Dialing

Values: P,T

Default: T

Description: Forces DTMF (touch-tone) dialing until a Pcommand or Pdial modifier is received.

Command: VnResult Code Format

Values: n = 0 or 1

Default: 1

Description: V0 Displays result codes as digits (terse response).

V1 Displays result codes as words (verbose response)

Command: WnConnect Message Control

Values: n = 0, 1, or2

Default: 0

Description: W0 The CONNECT result code reports the serial port speed only.

W1 The CONNECT result code reports the line speed, the error correction protocol,

and the serial port speed, respectively.

W2 The CONNECT result code reports the line speed only.

Note: See also the \V command

Command: XnResult Code Selection

Values: n = 0–4

Default: Country Dependent

Description: Selects the result message subset that the modem will use to inform the computer of the

results of commands.

X0 Sends OK, CONNECT, RING, NO CARRIER, ERROR and NO ANSWER; does not

look for dial tone or busy signal.

X1 Sends X0 messages and connect speed; doesn’t look for dial tone or busy signal.

X2 Sends X1 messages with NO DIALTONE; does not look for busy signal.

X3 Sends X1 messages with BUSY; does not look for dial tone.

X4 Sends all messages, including NO DIALTONE and BUSY.

Note: In fax mode, the only message sent to indicate a connection is CONNECT without

a speed indication. See also the \V command.

Chapter 2 – AT Commands

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 8

Command: ZnModem Reset

Values: n = 0 or 1

Default: None

Description: The modem performs a soft reset and restores (recalls) the configuration profile according

to the parameter supplied. If no parameter is specified, zero is assumed.

Z0 Resets modem and restores Profile 0.

Z1 Resets modem and restores Profile 1.

Note: See also the &F and &W commands.

Command: &CnData Carrier Detect (DCD) Control

Values: n = 0 or 1 (all models) 2, 3, 4, 5, 6, 7 (MT5600BA and MT5600BR only)

Default: 1, 3, 4

Description: &C0 Turns off reset on loss of carrier.

&C1 A second way to turn off reset on loss of carrier.

&C2 DCD goes high 500ms after CONNECT message is generated.

&C3 DCD goes high when the CONNECT message is generated.

&C4 Disables &C5 and &C6 commands.

&C5 UNIX only: Holds DCD low until proper callback security password is entered or

until a disconnect occurs. This prevents UNIX login prompt from being displayed

before the callback security ENTER PASSWORD prompt appears.

&C6 Linux only: Waits to display the connect message until the proper callback security

password is entered.

&C7 Resets on loss of DCD.

Command: &DnData Terminal Ready (DTR) Control

Values: n = 0, 1, 2, or3

Default: 2

Description: This command interprets the high to low transition of the DTR signal sent by the computer

according to the supplied parameter. The action taken depends on the current &Q setting.

&D0 &Q0, &Q5,&Q6: DTR is ignored (assumed high). Allows operation with computers

that do not provide DTR.

&Q1: DTR drop causes the modem to hang up. Autoanswer is not affected.

&Q2,&Q3: DTR drop causes the modem to hang up. Autoanswer is inhibited.

&D1 &Q0, &Q1, &Q5,&Q6: DTR drop is interpreted by the modem as if the

asynchronous escape sequence had been entered. The modem returns to

asynchronous command state without disconnecting.

&Q2,&Q3:DTR drop causes the modem to hang up. Autoanswer is inhibited.

&D2 &Q0–&Q6: DTR drop causes the modem to hang up. Autoanswer is inhibited.

&D3 &Q0, &Q1, &Q5,&Q6: DTR drop causes modem to perform a soft reset as if the Z

command were received. The &Y setting determines which profile is loaded.

&Q2,&Q3: DTR drop causes the modem to hang up. Autoanswer is inhibited.

&Q5 or &Q6 and +FCLASS=1 or +FCLASS=2: Same as for &Q0.

Note: If &D1, &D2,or &D3 is set, the modem will not dial without a DTR drop.

Command: &EnV.42 Error Correction Modes

Note: For use with MT5600BA and MT5600BR only.

Values: n = 0, 1, or 2

Default: 1

Description: &E0 V.42 non-error correction mode (V.42 disabled).

&E1 V.42 auto-reliable mode.

&E2 V.42 reliable mode (V.42 enabled).

Chapter 2 – AT Commands

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 9

Command: &EnModem-Initiated Flow Control

Note: For use with MT5600BA and MT5600BR only.

Values: n = 3, 4, or 5

Default: 4

Description: &E3 Flow control disabled.

&E4 CTS/RTS hardware flow control.

&E5 XON/XOFF software flow control.

Note: See also the L5 and &K commands.

Command: &EnV.42bis Data Compression

Note: For use with MT5600BA and MT5600BR only.

Values: n = 14 or 15

Default: 15

Description: &E14 V.42bis data compression disabled.

&E15 V.42bis data compression enabled.

Note: This command controls only V.42bis data compression, whereas the %C command

controls both V.42bis and MNP-5 data compression. The command in effect is the

one last entered. See also the L5 command.

Command: &FnLoad Factory Settings

Values: n = 0 or 1

Default: None

Description: &F0 Loads factory configuration 0.

&F1 Loads factory configuration 1.

Note: See also the Z, L5, and &V commands.

Command: &GnV.22bis Guard Tone Control

Values: n = 0, 1, or2

Default: Varies by country

Description: &G0 Disables guard tone.

&G1 Sets guard tone to 550 Hz.

&G2 Sets guard tone to 1800 Hz.

Note: The &G command is not used in North America, and may not be permitted in some

countries.

Command: &KnFlow Control Selection

Values: n = 0, 3, 4, 5, or6

Defaults: 3 (data modem mode)

6 (fax modem and voice modes)

Description: &K0 Disables flow control.

&K3 Enables CTS/RTS hardware flow control.

&K4 Enables XON/XOFF software flow control.

&K5 Enables transparent XON/XOFF flow control.

&K6 Enables both CTS/RTS and XON/XOFF flow control.

Note: See also the &E command

Command: &MnCommunications Mode

Values: n = 0–3

Default: 0

Description: This command determines the DTR operating mode. The modem treats the &M command

as a subset of the &Q command.

&M0 Selects direct asynchronous operation. Command sequence &M0\N0 selects

normal buffered mode, but command sequence \N0&M0 selects direct mode. This

is because the \N0 command is analogous to the &Q6 command.

&M1 Selects synchronous connect mode with asynchronous offline command mode.

&M2 Note: For use with the MT5656ZDX and MT5656ZDX-V only. Selects synchronous

connect mode with asynchronous offline command mode.

Same as &M1 except that &M2 enables DTR dialing of directory slot 0. The modem

disconnects if DTR is low for more than the period stored in S25.

&M3 Selects synchronous connect mode. This mode allows DTR to act as a talk/data

switch. A call is manually initiated while DTR is inactive; when it becomes active,

the handshake proceeds in originate or answer mode according to S14 bit 7.

Chapter 2 – AT Commands

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G) 10

Command: &PnMake/Break Dial Ratio

Values: n = 0, 1, 2,3

Default: Varies by country/region

Description: &P0 Make/Break dial ratio of 39/61 at 10 pps

&P1 Make/Break dial ratio of 33/67 at 10 pps

&P2 Make/Break dial ratio of 39/61 at 20 pps

&P3 Make/Break dial ratio of 33/67 at 20 pps

Command: &QnSync/Async Mode

Note: The MT5600ZDX does not support Sync mode.

Values: n =0-3, 5, 6

Default: 5

Description: This command is an extension of &M and is used to control which connection modes are

permitted. It is used in conjunction with S36 and S48. (See also the \N command.)

&Q0 Selects direct asynchronous operation. See &M0.

&Q1 Selects synchronous connect mode with asynchronous offline command mode.

See &M1. Serial interface operation only.

&Q2 Selects synchronous connect mode with asynchronous offline command mode;

enables DTR dialing of directory 0. See &M2. Serial interface only.

&Q3 Selects synchronous connect mode with asynchronous offline command mode;

enables DTR to act as a talk/data switch. See &M3. Serial only.

&Q5 The modem will try to negotiate an error-corrected link. It can be configured using

S36 to determine whether a failure will result in disconnecting or falling back to a

non-error-correction connection. See also \N3.

&Q6 Selects asynchronous operation with speed buffering and no error correction.

Same as \N0.

Command: &RnClear to Send (CTS) Control

Values: n = 0 or 1

Default: 1

Description: &R0 Lets the CTS state follow the RTS state when online..

&R1 Forces CTS high (ON).

Note: This command applies only in synchronous mode.

Command: &SnData Set Ready (DSR) Control

Values: n = 0 or 1

Default: 0

Description: &S0 Forces DSR high (on) at all times.

&S1 Lets DSR go high only during a connection.

Command: &TnLocal Analog Loopback Test

Values: n = 0,1

Default: None

Description: The modem will perform the local analog loopback test if &T1 is selected. The test can be

run only when the modem is in asynchronous operation in non-error-correction mode

(normal), AT&Q6. To terminate a test in progress, the escape sequence (+++) must be

entered first.

&T0 Terminates any test in progress. Clears S16.

&T1 Starts local analog loopback, V.54 Loop 3. Sets S16 bit 0. If a connection exists

when this command is issued, the modem hangs up. A CONNECT XXXX message

is displayed at the start of the test.

Command: &VnDisplay Current Configuration and Statistics for Last Connection

Values: 0,1

Default: None

Description: &V0 Displays the current (active) configuration.&V1 Displays statistics for the last

connection. Not available in all versions. Note: See also the L5 command. (L5 is not

supported in MT5656ZDX).

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