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MT2834ZPW

MULTI-TECH SYSTEMS, INC.

MT2834ZPW

Card Type

Modem

Chip Set

Unidentified

I/O Options

Line in, line out, microphone in, speaker out

Maximum Modem Rate

33.6Kbps

Maximum Fax Rate

14.4Kbps

Data Modulation Protocol

Bell 103/212A

ITU-T V.22, V.22bis, V.32ter, V.32bis, V.34

Fax Modulation Protocol

ITU-T V.17, V.27ter, V.29

Error Correction/Compression

MNP5, V.42, V.42bis

Fax Class

Class I

Data Bus

16-bit ISA

CONNECTIONS

Function

Label

Function

Label

Line out (RJ-11)

CN1

Speaker out

CN3

Line in (RJ-11)

CN2

Microphone in

CN4

SUPPORTED COMMAND SET

Basic AT Commands

AT, +++, A/

A, C, E, F, H, M, Q, W, Y

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

Extended AT Commands

\V

Special Commands

-C

S Registers

S0, S1, S2, S3, S4, S5, S10

 

Note: See MHI Help File for full command documentation.

 

Proprietary AT Command Set

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

í 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.

AUXILLARY RELAY CONTROL

Type:

Configuration

Format:

AT [cmds] &J [cmds]

Description:

Controls auxiliary relay

Command

Function

&J0

Auxiliary relay remains open

COMMUNICATION PROTOCOLS

Type:

Configuration

Format:

AT [cmds] Bn [cmds]

Description:

Selects the communication protocol for data calls

Command

Protocol

B0

Modem will use ITU-T V.22 at 1200bps.

B1

Modem will use Bell 212A at 1200bps.

B2

ITU-T V.23 reverse channel disabled

B3

ITU-T V.23 reverse channel disabled

B15

Modem will use ITU-T V.21 at 300bps.

B16

Modem will use Bell 103J at 300bps.

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.

í &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

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

í &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

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

DSn

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.

DV

Switch to speakerphone

D^

Data calling tone transmission disabled

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] &Kn [cmds]

Description:

Enables flow control options

Command

Function

&K0

Flow control disabled

í &K3

RTS/CTS flow control enabled

&K4

XON/XOFF flow control enabled

 

ON-LINE

Type:

Immediate

Format:

AT [cmds] On

Description:

Instructs the modem to return to on-line state.

Command

Function

O0

Return to on-line state.

O1

Return to on-line state and initiate retrain sequence.

O3

Return to on-line state and initiate renegotiation sequence.

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

I9

Reports country code

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

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.

í X4

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

X5

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

X6

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

X7

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

SOFT RESET

Type:

Immediate

Format:

AT [cmds] Zn [cmds]

Description:

Restores modem profiles previously saved in non-volatile RAM using the &W command.

Command

Function

Z0

Restore modem to profile saved by last &W command

Z1

Restore modem to profile saved by last &W command

 

SPEAKER VOLUME

Type:

Configuration

Format:

AT [cmds] Ln [cmds]

Description:

Controls speaker volume

Command

Function

L0

Low volume setting

L1

Low volume setting

í L2

Medium volume setting

L3

Highest volume setting

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

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

V.32 - AUTO-RETRAIN

Type:

Configuration

Format:

AT [cmds] &Bn [cmds]

Description:

Controls auto-retrain function if poor line quality is detected

Command

Function

&B1

Auto-retrain enabled if line quality is poor

Extended AT Commands

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Description:

Configures action of break signal

Command

Function

\K5

Sends break received from DTE to the remote modem

COMPRESSION

Type:

Configuration

Format:

AT [cmds] %Cn [cmds]

Description:

Selects data compression

Command

Function

%C0

Data compression disabled

%C1

V.42bis/MNP5 enabled

 

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

MNP reliable mode enabled

í \N3

V.42/MNP auto-reliable mode enabled

\N4

V.42 reliable mode enabled

\N5

V.42/MNP auto-reliable mode enabled

\N7

V.42/MNP auto-reliable mode enabled

DISPLAY BLACKLIST NUMBERS

Type:

Immediate

Format:

AT [cmds] %B [cmds]

Description:

Displays the list of all the numbers on the blacklist. Returns ERROR if blacklisting is disabled.

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] \Gn [cmds]

Description:

Command nonfunctional; for compatibility purposes only

Command

Function

\G0

Returns OK for backward compatibility

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] \Qn [cmds]

Description:

Sets type of flow control used by modem

Command

Function

\Q0

Flow control disabled

\Q1

Bi-directional XON/XOFF flow control enabled

í \Q3

Bi-directional RTS/CTS flow control enabled

INACTIVITY TIMER

Type:

Configuration

Format:

AT [cmds] \Tn [cmds]

Description:

Disables the inactivity timer

Command

Function

\T0

Inactivity timer disabled

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] \Jn [cmds]

Description:

Sets operation of serial port speed

Command

Function

\J0

Serial speed locked

 

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] \Xn [cmds]

Description:

Selects whether XON/XOFF signals are sent to remote modem

Command

Function

\X0

XON/XOFF signals trapped by local modem

Special Commands

ASYNCHRONOUS WORD LENGTH

Type:

Configuration

Format:

AT [cmds] +ES=n [cmds]

Description:

Allows an H.324 video application direct access to the synchronous data channel. +ES=? Shows allowable value (6) +ES? Queries setting

Command

Function

+ES=6

Allows an H.324 video application direct access to the synchronous data channel

SPEAKER CODEC LOOPBACK

Type:

Configuration

Format:

AT [cmds] &&S [cmds]

Description:

Provides a loopback from the microphone to the speaker.

Note:

For testing and debugginh purposes only

S(STATUS) -REGISTERS

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

 

DIALING DELAY

Type:

Register

Format

AT [cmds] S6=n [cmds]

Range:

2-65

Unit:

1 second

Description:

Duration of delay after modem goes off-hook and before dialing

INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] S89=n [cmds]

Range:

0, 5-255

Default:

10

Unit:

1 second

Description:

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

NO CARRIER TIME-OUT

Type:

Register

Format

AT [cmds] S7=n [cmds]

Range:

1-255

Unit:

1 second

Description:

Maximum wait time the modem uses after dialing to detect a carrier signal from the remote modem for both originating and answering calls.

PAUSE DURATION

Type:

Register

Format

AT [cmds] S8=n [cmds]

Range:

0-65

Unit:

1 second

Description:

Duration of pause per comma (,) command used in a command or dial string

TONE PULSE DURATION

Type:

Register

Format

AT [cmds] S11=n [cmds]

Range:

50-150

Unit:

1 ms

Description:

DTMF tone pulse duration and time between tone pulses for tone dialing operations.

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.

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.

 

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.

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.