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MT3334ZDX, MT3334ZDXV

MULTI-TECH SYSTEMS, INC.

MT3334ZDX, MT3334ZDXV

Card Type

Modem, Fax

Chip Set

Unidentified

I/O Options

Serial ports, power jack, line in, line out

Maximum Modem Rate

33.6Kbps

Maximum Fax Rate

14.4Kbps

Data Modulation Protocol

Bell 103A/212A

ITU-T V.32bis, V.34

Fax Modulation Protocol

ITU-T V.17

Error Correction/Compression

MNP5, V.42, V.42bis

Fax Class

Unidentified

Data Bus

External

CONNECTIONS

Function

Label

Function

Label

Line in via RJ-11

CN1

Serial port

CN3

Line out via RJ-11

CN2

Power jack

CN4

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

TD

Unidentified

Blinking

Modem transmitting data

TD

Unidentified

Off

Modem not transmitting data

RD

Unidentified

Blinking

Modem is receiving data

RD

Unidentified

Off

Modem is not receiving data

CD

Unidentified

On

Carrier signal detected

CD

Unidentified

Off

Carrier signal not detected

V.34

Unidentified

On

Modem connected in V.34 mode at 33.6Kbps

V.34

Unidentified

Off

Modem is not connected in V.34 mode at 33.6Kbps

V.32bis

Unidentified

On

Modem connected in V.32bis mode or less

V.32bis

Unidentified

Off

Modem is not connected in V.32bis mode

9.6

Unidentified

On

Modem is connected at 9.6Kbps

9.6

Unidentified

Off

Modem is not connected at 9.6Kbps

OH

Unidentified

On

Modem is on-hook

OH

Unidentified

Off

Modem is off-hook

TR

Unidentified

On

DTR signal is high

TR

Unidentified

Off

DTR signal is low

EC

Unidentified

On

Modem is set for V.42 error compression

EC

Unidentified

Off

Modem is not set for V.42 error compression

EC

Unidentified

Blinking

Data compression enabled

FAX

Unidentified

On

Modem is in Fax mode

FAX

Unidentified

Off

Modem is not in Fax mode

SUPPORTED COMMAND SET

Basic AT Commands

AT, A/

A, B, E, F, H, M, O, Q, S, V, Y, Z

&C, &F, &G, &V, &Z

Extended AT Commands

\V

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S10, S11, S30

 

Note: See MHI Help File for full command documentation.

Proprietary AT Command Set

TRANSMIT CARRIER

Type:

Configuration

Format:

AT [cmds] Cn [cmds]

Description:

Controls the transmit carrier switching

Command

Function

C1

Transmit carrier enabled

DIAL

Type:

Immediate

Format:

AT [cmds] D<#> [cmds]

Description:

Dials telephone number according to any modifiers included in the string

Note:

Any combination of modifiers can be used to produce the desired dial functions in sequence.

Command

Function

DL

Re-dial last number

DP

Pulse dialing enabled

DS=n

Dial stored telephone number n

DT

Tone dialing enabled/Pulse dialing disabled

DW

Dialing resumed following dial tone detection

D,

Dialing paused for amount of time specified in S8 register

D!

Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.

D@

Wait for quiet Answer function enabled. Modem waits until a "quiet answer," a ring-back signal followed by silence up to the time specified in S7, is received prior to executing the rest of the dial string.

D;

Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

D$

Calling card "Bong" detection enabled

DV

Switch to speakerphone

D^

Data calling tone transmission disabled

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested

Command

Function

I0

Reports default speed and controller firmware code

I1

Reports ROM checksum

I2

Tests and reports ROM checksum

I3

Reports default speed and controller firmware code

I4

Reports data pump model and revision code

SPEAKER VOLUME

Type:

Configuration

Format:

AT [cmds] Ln [cmds]

Description:

Controls speaker volume

Command

Function

L0

Low volume setting

L1

Low volume setting

L2

Medium volume setting

L3

Highest volume setting

AUTO-MODE DETECTION

Type:

Configuration

Format:

AT [cmds] Nn [cmds]

Description:

Selects various options for the automatic detection and negotiation of protocols during the handshake process if the modem is communicating with a remote modem of dissimilar speed.

Command

Function

N0

In originate mode, handshake begins at line speed designated by the S37 register and the B command

N1

In originate mode, handshake begins at line speed designated by the S37 register. and the B command Modem can shift to a slower speed if necessary.

SELECT CALL PROGRESS RESULT CODES

Type:

Configuration

Format:

AT [cmds] Xn [cmds]

Description:

Enables selection of tone detection and associated result code format options

Command

Function

X0

Busy and dial tone detection disabled; basic result codes enabled.

X1

Busy and dial tone detection disabled; extended result codes enabled.

X2

Busy tone detection disabled, dial tone detection enabled; extended result codes enabled.

X3

Busy tone detection enabled, dial tone detection disabled; extended result codes enabled.

X4

Busy and dial tone detection disabled; extended result codes enabled.

DATA TERMINAL READY (DTR)

Type:

Configuration

Format:

AT [cmds] &Dn [cmds]

Description:

Selects modem response to DTR

Command

Function

&D0

Modem does not respond to DTR

&D1

Modem goes to command mode after DTR goes is off

&D2

Modem goes to command mode and disconnects (hangs up) after DTR goes off; Auto-Answer is disabled.

&D3

Modem is initialized after DTR goes off

AUXILLARY RELAY CONTROL

Type:

Configuration

Format:

AT [cmds] &J [cmds]

Description:

Controls auxiliary relay

Command

Function

&J0

Auxiliary relay remains open

&J1

Not supported

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] &Kn [cmds]

Description:

Enables flow control options

Command

Function

&K0

Flow control disabled

&K3

RTS to CTS flow control enabled

&K4

XON/XOFF flow control enabled

COMMUNICATIONS MODE

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Description:

Selects communications mode

Command

Mode

&M0

Asynchronous mode

COMMUNICATIONS MODE

Type:

Configuration

Format:

AT [cmds] &Qn [cmds]

Description:

Selects communications mode options

Command

Mode

&Q0

Asynchronous mode, serial port speed follows connect speed.

&Q5

Error correction mode

&Q6

Buffered asynchronous mode

DATA SET READY (DSR)

Type:

Configuration

Format:

AT [cmds] &Sn [cmds]

Description:

Selects DSR options

Command

Function

&S0

DSR forced high

&S1

DSR high only while modem is connected

TEST MODES

Type:

Immediate

Format:

AT [cmds] &Tn

Description:

Selects test options

Command

Function

&T0

End current test

&T1

Begin local analog loopback test

&T3

Begin local digital loopback

&T6

Request remote digital loopback

STORE ACTIVE PROFILE

Type:

Configuration

Format:

AT [cmds] &Wn [cmds]

Description:

Writes the values for the active profile into the non-volatile RAM

Command

Function

&W0

Write the active profile to NVRAM

RESTORE PROFILE ON POWER-UP

Type:

Configuration

Format:

AT [cmds] &Yn [cmds]

Description:

Restores a selected profile into the active profile on power-up (hard reset)

Command

Function

&Y0

Restore profile 0 on power-up

Extended AT Commands

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Description:

Configures action of break signal

Command

Break from DTE

Modem receives \B

Break received from remote modem

\K5

Send break with transmitted data

Send break with transmitted data

Break sent with received data to the DTE

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Description:

Controls the type of connection the modem will operate in

Command

Function

\N0

Normal mode enabled

\N1

Direct mode enabled

\N2

Reliable mode enabled

\N3

V.42/MNP auto-reliable mode enabled

\N4

V.42 reliable mode enabled

\N5

V.42, MNP, or normal mode

COMPRESSION

Type:

Configuration

Format:

AT [cmds] %Cn [cmds]

Description:

Selects data compression

Command

Function

%C0

Data compression disabled

%C1

V.42bis/MNP5 enabled

Special Commands

DTR DIALING

Type:

Configuration

Format:

AT [cmds] $Dn [cmds]

Description:

Enables/disables DTR dialing

Command

Function

$D0

DTR dialing disabled

$D1

DTR dialing enabled

MODEM BAUD RATE

Type:

Configuration

Format:

AT [cmds] $MBn [cmds]

Description:

Selects modem baud rate

Command

Function

$MB75

CCITT V.23 mode

$MB300

300bps

$MB1200

1200bps

$MB2400

2400bps

$MB4800

4800bps

$MB9600

9600bps

$MB14400

14.4Kbps

$MB19200

19.2Kbps

$MB28800

28.8Kbps

$MB33600

33.6Kbps

SERIAL PORT BAUD RATE

Type:

Configuration

Format:

AT [cmds] $SBn [cmds]

Description:

Selects serial port baud rate

Command

Function

$SB300

300bps

$SB1200

1200bps

$SB2400

2400bps

$SB4800

4800bps

$SB9600

9600bps

$SB19200

19.2Kbps

$SB38400

38.4Kbps

$SB57600

57.6Kbps

$SB115200

115.2Kbps

S(STATUS) -REGISTERS

ESCAPE CHARACTER

Type:

Register

Format

AT [cmds] S9=n [cmds]

Range:

1-127

Unit:

ASCII

Description:

Defines remote configuration escape character.

V.34 MODULATION

Type:

Register

Format

AT [cmds] S28=n [cmds]

Range:

0-255

Unit:

Decimal

Description:

Enables V.34 modulation

Note: S28=0 disables V.34 modulation.

V.25 CALLING TONE

Type:

Register

Format

AT [cmds] S35=n [cmds]

Range:

0-1

Unit:

Decimal

Description:

Enables V.25 data calling tone, which allows remote data/fax/voice discrimination

Note: S35=0 disables V.25 data calling tone.

ERROR CORRECTION NEGOTIATION

Type:

Register

Format

AT [cmds] S36=n [cmds]

Description:

Selects the action of the modem if it fails to connect when error control is selected.

Command

S48=7

S48=128

S36=0

LAPM or hang-up

Not used

S36=1

LAPM or Asynchronous

Asynchronous

S36=2

LAPM or hang-up

Not used

S36=3

LAPM or Asynchronous

Asynchronous

S36=4

LAPM, MNP, or hang-up

MNP or hang-up

S36=5

LAPM, MNP, or Asynchronous

MNP or Asynchronous

S36=6

LAPM, MNP, or hang-up

MNP or hang-up

S36=7

LAPM, MNP, or Asynchronous

MNP or Asynchronous

DCE LINE SPEED

Type:

Register

Format

AT [cmds] S37=n [cmds]

Description:

Sets the maximum allowable data exchange rate attempted during handshake process.

Command

Function

S37=0

Maximum speed

S37=1

Reserved

S37=2

1200/75bps

S37=3

300bps

S37=4

Reserved

S37=5

1200bps

S37=6

2400bps

S37=7

4800bps

S37=8

7200bps

S37=9

9600bps

S37=10

12.0Kbps

S37=11

14.4Kbps

S37=12

16.8Kbps

S37=13

19.2Kbps

S37=14

21.6Kbps

S37=15

24.0Kbps

S37=16

26.4Kbps

S37=17

28.8Kbps

S37=18

31.2Kbps

S37=19

33.6Kbps

V32bis, V.22bis AUTO RATE

Type:

Register

Format

AT [cmds] S42=n [cmds]

Range:

0-1

Unit:

Decimal

Description:

Enables V.32bis and V.22bis auto rate

Note: S42=0 disables V.32bis and V.22bis auto rate. For testing purposes only.

V32bis STARTUP MODE

Type:

Register

Format

AT [cmds] S43=n [cmds]

Range:

0-1

Unit:

Decimal

Description:

Enables V.32bis start-up auto mode operation

Note: S43=0 disables V.32bis start-up auto mode. For testing purposes only.

FEATURE NEGOTIATION

Type:

Register

Format:

AT [cmds] S48=n [cmds]

Range:

7, 128

Description:

Selects active error correction and compression protocols. See S36, error correction negotiation table

INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] S89=n [cmds]

Range:

0, 5-255

Unit:

1 second

Description:

Sets the length of time that the modem does not receive information before it disconnects; S89=0 will disable.