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MT932EAI

MULTI-TECH SYSTEMS, INC.

MT932EAI

Card Type

Modem (synchronous/asynchronous)

Chip Set

Unidentified

Maximum Data Rate

9600bps

Data Bus

External

Data Modulation Protocol

Bell 103/212A

ITU-T V.21, V.22, V.22bis, V.23, V.25bis, V.32

Error Correction/Compression

MNP5, V.42, V.42bis

CONNECTIONS

Function

Label

Function

Label

DC power

CN1

Volume

R1

RS-232/422

CN2

Power switch

SW1

Line out

CN3

Speed switch

SW2

Line in

CN4

Voice/data switch

SW3

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í CTS normal

SW4/A

Off

CTS forced high

SW4/A

On

í Dial-up line

SW4/B

On

Leased line

SW4/B

Off

í External clock (Synchronous mode)

Multi-Tech response code (Asynchronous mode)

SW4/C

Off

Internal clock (Synchronous mode)

Hayes response code (Asynchronous mode)

SW4/C

On

í Asynchronous mode

SW4/D

Off

Synchronous mode

SW4/D

On

í DTR forced high

SW5/A

On

DTR normal

SW5/A

Off

í Verbose result code (Asynchronous mode)

Analog loopback test enabled when SW4/B is on (Synchronous mode)

SW5/B

On

Numeric result code (Asynchronous mode)

Analog loopback test disabled when SW4/B is off (Synchronous mode)

SW5/B

Off

í Result code sending enabled (Asynchronous mode)

Remote loopback test enabled (Synchronous mode)

SW5/C

Off

Result code sending disabled (Asynchronous mode)

Remote loopback test disabled (Synchronous mode)

SW5/C

On

í Local echo enabled (Asynchronous mode)

Local Digital loopback test enabled (Synchronous mode)

SW5/D

On

Local echo disabled (Asynchronous mode)

Local Digital loopback test disabled (Synchronous mode)

SW5/D

Off

í Auto-answer enabled (Dial-up mode)

Answer mode (Leased line mode)

SW5/E

On

Auto-answer disabled (Dial-up mode)

Originate mode (Leased line mode)

SW5/E

Off

í CD/DSR signals normal

SW5/F

On

CD/DSR signals forced high

SW5/F

Off

í RTS forced high

SW5/G

Off

RTS normal

SW5/G

On

í Smart mode

SW5/H

Off

Dumb mode

SW5/H

On

DIAL-UP/LEASE LINE

Setting

JP4

í Dial-up

Pins 3 & 5, 4 & 6 closed

Lease line

Pins 1 & 3, 2 & 4 closed

DSR

Setting

JP3

í DSR follows CD

Pins 1 & 2 closed

DSR follows off-hook

Pins 2 & 3 closed

MI/MIC

Setting

JP5

í MI/MIC disabled

Pins 3 & 5, 4 & 6 closed

MI/MIC enabled

Pins 1 & 3, 2 & 4 closed

RTS/CTS

Setting

JP2

í CTS follows RTS

Pins 1 & 2 closed

CTS forced high

Pins 2 & 3 closed

SDLC/BSC

Setting

JP1

í SDLC

Pins 1 & 2 closed

BSC

Pins 2 & 3 closed

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

SD

Red

On

Modem is transmitting data

SD

Red

Off

Modem is not transmitting data

RD

Red

On

Modem is receiving data

RD

Red

Off

Modem is not receiving data

CD

Red

On

Carrier signal detected

CD

Red

Off

Carrier signal not detected

CD

Red

Blinking

Modem is retraining

96

Red

On

Modem connected at 9600bps

96

Red

Off

Modem not connected at 9600bps

24

Red

On

Modem connected at 24Kbps

24

Red

Off

Modem not connected at 24Kbps

12

Red

On

Modem connected at 1200bps

12

Red

Off

Modem not connected at 1200bps

OH

Red

On

Modem is off-hook

OH

Red

Off

Modem is on-hook

TR

Red

On

DTR signal is high

TR

Red

Off

DTR signal is low

Note: If LED 96, 24, and 12 are on the modem is connected at 300bps. If LED 96 and 24 are on the modem is connected at 4800bps. If LED 96, 24, or 12 are blinking 3 times a second then V.42 is enabled at that speed. If LED 96, 24, or 12 are blinking 1 time a second then data compression is enabled at that speed.

Proprietary AT Command Set

ATTENTION

Type:

Immediate

Format:

AT [cmds]

Description:

Tells the modem that a command follows

ANSWER

Type:

Immediate

Format:

AT [cmds] A

Description:

Enables answer mode, the modem goes off-hook

REPEAT PREVIOUS COMMAND

Type:

Immediate

Format:

A/

Description:

Repeats previous command

Note:

Do not precede this command with AT, or follow it with <CR>

REDIAL

Type:

Immediate

Format:

A:

Description:

Redials the last number dialed until it is no longer busy or 10 attempts are made

Note:

Do not precede this command with AT or follow it with <CR>

AUTO-RELIABLE TIME BUFFER CONFIGURATION

Type:

Configuration

Format:

AT [cmds] $An [cmds]

Description:

Controls the handling of incoming data during auto-reliable time period

Command

Function

í $A0

Data is discarded

$A1

Data is buffered

HANDSHAKE ATTEMPTS

Type:

Configuration

Format:

AT [cmds] #An [cmds]

Description:

Configures the initial handshake phase.

Command

Function

#A0

Attempts in order: 9600bps, 4800bps, 2400bps, 1200bps and 300bps

í #A1

Attempts in order: 9600bps, 2400bps, 1200bps and 300bps

#A2

Attempts V.32 connection in order: 9600bps and 4800bps

#A3

Attempts V.22 connection in order: 2400bps, 1200bps and 300bps

BLIND DIALING

Type:

Configuration

Format:

AT [cmds] Bn [cmds]

Description:

Selects blind dial or wait-for-dial-tone

Note:

Use with AT&Q0 and AT&Q2

Command

Function

B0

Modem will blind dial (Default for MT932EA)

í B1

Modem will wait for dial tone before dialing

ANSWER TONE

Type:

Configuration

Format:

AT [cmds] Bn [cmds]

Description:

Selects the answer tone used for data calls

Note:

Use with AT&Q1 and AT&Q3

Command

Protocol

í B0

ITU-T answer tone (Default for MT932EA)

B1

Bell answer tone

BUFFER SIZE

Type:

Configuration

Format:

AT [cmds] &Bn [cmds]

Description:

Selects the modemís transmit/receive buffer size

Command

Function

í &B0

Normal buffer size

&B1

Small buffer size

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

AT [cmds] &BSn [cmds]

Description:

Sets the maximum transmittable block size

Command

Function

&BS0

Maximum block size is 64 characters

í &BS1

Maximum block size is 256 characters

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] $BAn [cmds]

Description:

Sets operation of serial port speed

Command

Function

í $BA0

Serial speed locked at rate set by $SB

$BA1

Serial speed follows connect speed ignoring $SB

CD SIGNAL

Type:

Configuration

Format:

AT [cmds] &Cn [cmds]

Description:

Configures the behavior of the carrier detect signal

Command

Function

&C0

CD forced high

í &C1

CD normal

&C2

CD forced high except during disconnect

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. The maximum characters that can be use is 60 including modifiers.

Modifier

Function

P

Pulse dialing enabled

R

Answer mode enabled originate mode disabled following handshake initiation

T

Tone dialing enabled

W

Dialing resumed following dial tone detection

,

Dialing paused for amount of time specified in S8 register

!

Flash function initiated. Modem commanded to go off-hook for half a second before returning on-hook.

@

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.

;

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

STORE PHONE NUMBER

Type:

Configuration

Format:

AT [cmds] D<#>Nn

Example:

ATD5551212N1

Description:

Stores a phone number in the modemís memory (n=0-9)

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

DTR DIALING

Type:

Configuration

Format:

AT [cmds] $Dn [cmds]

Description:

Selects the DTR dialing function

Command

Function

í $D0

DTR dialing disabled

$D1

DTR dialing enabled

ECHO

Type:

Configuration

Format:

AT [cmds] En [cmds]

Description:

Enables modem to echo commands received from the DTE

Command

Function

E0

Echo function disabled

í E1

Echo function enabled

V.42 MODE

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Description:

Configures the operation of V.42 mode

Command

Function

&E0

Error correction disabled normal mode enabled

í &E1

V.42 set to auto-reliable mode

&E2

V.42 set to reliable mode

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Description:

Sets type of flow control used by modem

Command

Function

í &E3

Flow control disabled

&E4

CTS/RTS flow control enabled

&E5

XON/XOFF flow control enabled

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Description:

Selects whether XON/XOFF signals are sent to remote modem

Command

Function

í &E6

XON/XOFF signals trapped by local modem

&E7

XON/XOFF passed through local modem

FLOW CONTROL - ENQ/ACK

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Description:

Selects ENQ/ACK pacing

Command

Function

í &E8

Enables ENQ/ACK pacing

&E9

Disables ENQ/ACK pacing

FLOW CONTROL IN NORMAL MODE

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Description:

Selects XON/XOFF flow control for non-error-correcting connections

Command

Function

í &E10

XON/XOFF disabled for non-error-correcting connections

&E11

XON/XOFF enabled for non-error-correcting connections

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Description:

Selects flow control

Command

Function

&E12

Flow control disabled

í &E13

Flow control enabled

COMPRESSION

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Description:

Selects data compression

Command

Function

&E14

Data compression disabled

í &E15

Data compression enabled

ASYNCHRONOUS FORMAT

Type:

Configuration

Format:

AT [cmds] $EBn [cmds]

Description:

Selects 10- or 11-bits for asynchronous mode

Command

Function

í $EB0

Sets 10-bit asynchronous format

$EB1

Sets 11-bit asynchronous format

FALLBACK

Type:

Configuration

Format:

AT [cmds] #Fn [cmds]

Description:

Controls fallback

Command

Function

í #F0

Fallback disabled

#F1

Fallback from 9600bps to 4800bps as line quality degrades

FACTORY DEFAULTS

Type:

Immediate

Format:

AT [cmds] &F [cmds]

Description:

Loads factory defaults from ROM and DIP switches settings

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Configuration

Format:

AT [cmds] $Fn [cmds]

Description:

Controls whether the modem will react to <CR> while in auto-reliable mode

Note:

In auto-reliable mode the modem is given 4 seconds to make a connection in reliable mode, if <CR> is received during the 4 seconds the modem will establish a connection in normal mode.

Command

Function

$F0

Establish a connection using error correction

í $F1

Switch to normal mode on receipt of <CR>

GUARD TONE

Type:

Configuration

Format:

AT [cmds] &Gn [cmds]

Description:

Commands the modem to transmit a guard tone in V.22/V.22bis

Note:

Used primarily for international data transmission

Command

Function

í &G0

Guard tone disabled

&G1

550Hz guard tone enabled

&G2

1800Hz guard tone enabled

HELP SCREENS

Type:

Immediate

Format:

AT $Hn

Description:

Displays modem help screens

Command

Function

$H1

Displays help screen 1

$H2

Displays help screen 2

$H3

Displays help screen 3

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested

Command

Function

I0

Reports modem ID number

I1

Reports firmware revision number

LISTS

Type:

Immediate

Format:

AT [cmds] Ln [cmds]

Description:

Displays requested lists

Command

Function

L

Displays all phone numbers stored in memory

L5

Display current operating parameters

L6

Displays current S-register settings

L7

Displays additional parameters

COMPRESSION MODE

Type:

Configuration

Format:

AT [cmds] #Ln [cmds]

Description:

Selects active compression protocols

Command

Function

#L0

LAP-M/MNP negotiation enabled (default for MT932EAI)

#L1

MNP negotiation only enabled

#L2

LAP-M negotiation only enabled

#L3

LAP-M enabled, no negotiation

COMMUNICATIONS MODE

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Description:

Selects communications mode

Command

Mode

í &M0

Asynchronous mode when on-line

&M1

Synchronous mode when on-line

CONNECT SPEED

Type:

Configuration

Format:

AT $MBnnn

Description:

Sets maximum connect speed

Command

Function

$MB75

Sets V.23 mode (1200bps/75bps bi-directional)

$MB300

Sets 300bps connect

$MB1200

Sets 1200bps connect

$MB2400

Sets 2400bps connect

$MB4800

Sets 4800bps connect

í $MB9600

Sets 9600bps connect

MI/MIC

Type:

Configuration

Format:

AT [cmds] $MIn [cmds]

Description:

Controls MI/MIC option

Command

Function

$MI0

MI/MIC option disabled

$MI1

MI/MIC option enabled

DIAL STORED PHONE NUMBER

Type:

Immediate

Format:

AT [cmds] Nn

Description:

Dials stored phone number n. (n=0-9)

DIAL STORED PHONE NUMBER - LINKED

Type:

Immediate

Format:

AT [cmds] NxNy

Description:

Dials stored phone number x (x=0-9). If the number is busy (x), the modem will proceed to the next number selected (y) (y=0-9).

RESULT CODES

Type:

Configuration

Format:

AT &Qn

Description:

Selects standard Hayes or Multi-Tech result code sets with ATXn command

Command

Function

&Q0

Multi-Tech result codes/Blind dialing (ATBn) enabled, use ATX0-1

&Q1

Standard Hayes result codes/Answer tone selection (ATBn) enabled, use ATX2-4

&Q2

Multi-Tech result codes enabled/Blind dialing (ATBn) enabled, use ATX2-4

í &Q3

Multi-Tech result codes/Answer tone selection (ATBn) enabled, use ATX2-4

RETRANSMIT FAIL ACTION

Type:

Configuration

Format:

AT [cmds] $Rn [cmds]

Description:

Controls whether the modem gives up on a bad connection

Command

Function

í $R0

Hang up after 12 failed retransmissionís

$R1

Do not hang up after 12 failed retransmissionís

STATUS-REGISTER

Type:

Configuration

Format:

Read: AT [cmds] Sn? [cmds]

Write: AT [cmds] Sn=x [cmds]

Description:

Writes to or reads from a specified register

Note:

(n=0-16, 18, 24, 25), (x=decimal format); when reading the value of a register it is shown in a 3-digit decimal format.

LOCAL SERIAL PORT SPEED

Type:

Configuration

Format:

AT [cmds] $SBnnn [cmds]

Description:

Sets serial port speed

Command

Function

$SB300

Sets 300bps speed

$SB1200

Sets 1200bps speed

$SB2400

Sets 2400bps speed

$SB4800

Sets 4800bps speed

í $SB9600

Sets 9600bps speed

$SB19200

Sets 19.2Kbps speed

SPEED SWITCH

Type:

Configuration

Format:

AT [cmds] %Sn [cmds]

Description:

Sets the speed switch setting

Command

Function

í %S0

Speed switch set to 9600/1200/2400bps

%S1

Speed switch set to 9600/4800/2400bps

TEST MODES

Type:

Immediate

Format:

AT [cmds] &Tn

Description:

Selects test options

Command

Function

&T4

Grant remote digital loopback request

í &T5

Deny remote digital loopback request

TRELLIS MODULATION

Type:

Configuration

Format:

AT [cmds] #Tn [cmds]

Description:

Controls Trellis Coded Modulation

Command

Function

#T0

Disables TCM

í #T1

Enables TCM

LOOPBACK TEST MODE

Type:

Configuration

Format:

AT [cmds] Un [cmds]

Description:

Performs test modes

Command

Function

U0

Begin local analog loopback test in originate mode

U1

Begin local analog loopback test in answer mode

U2

Request remote digital loopback

U3

Begin local digital loopback

DIALING MODE

Type:

Configuration

Format:

AT [cmds] $VDn [cmds]

Description:

Selects voice/data mode dialing

Command

Function

í $VD0

Disables voice/data mode

$VD1

Enables voice/data mode

STORE ACTIVE PROFILE

Type:

Configuration

Format:

AT [cmds] &Wn [cmds]

Description:

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

Command

Function

&W0

Parameters stored in NVRAM

í &W1

Parameters not stored in NVRAM

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

í X0

Busy and dial tone detection disabled; result codes 0 - 4 enabled.

X1

Busy and dial tone detection disabled; result codes 0 - 5 & 10 enabled.

X2

Busy tone detection disabled, dial tone detection enabled; result codes 0 - 6 & 10 enabled.

X3

Busy tone detection enabled, dial tone detection disabled; result codes 0 - 5, 7 & 10 enabled.

X4

Busy and dial tone detection enabled; result codes 0 - 7 & 10 enabled.

CLOCK SOURCE - SYNCHRONOUS TRANSMIT

Type:

Configuration

Format:

AT [cmds] &Xn [cmds]

Description:

Selects DTE transmit clock source

Command

Function

í &X0

Modem generates clock

&X1

DTE generates clock

&X2

Modem generates clock from the receive carrier signal

BREAK TIME

Type:

Configuration

Format:

AT [cmds] S17=n [cmds]

Default:

25

Range:

0-255

Unit:

.01 second

Description:

Sets break time to DTE

DSR/CTS/CD TIMEOUT

Type:

Register

Format:

AT [cmds] S24=n [cmds]

Default:

20

Range:

0-255

Unit:

.05 second

Description:

Sets the time to drop the DSR, CTS, and CD signals to hang-up

DTR TIMEOUT

Type:

Register

Format:

AT [cmds] S25=n [cmds]

Default:

0

Range:

0-255

Unit:

.1 second

Description:

Sets the time to drop the DTR signal to hang-up

Note:

Setting S25 to 0 sets the DTR time-out to .05 second

INACTIVITY TIMER

Type:

Register

Format

AT [cmds] S30=n [cmds]

Default:

0

Range:

0-255

Unit:

1 minute

Description:

Maximum duration of DTE and DCE inactivity allowed prior to initiating hang-up process.

Note:

S30=0 will disable the timer

Proprietary V.25bis Command Set

CLEAR MEMORY LOCATION

Type:

Immediate

Format:

CLAn

Description:

Clears the phone number in memory location n.

LOCAL SERIAL PORT SPEED

Type:

Configuration

Format:

CSPn

Description:

Sets serial port speed

Command

Function

CSP300

Sets 300bps speed

CSP1200

Sets 1200bps speed

CSP2400

Sets 2400bps speed

CSP4800

Sets 4800bps speed

CSP9600

Sets 9600bps speed

CSP19200

Sets 19.2Kbps speed

CSP38400

Sets 38.4Kbps speed

REQUEST LISTED NUMBERS

Type:

Immediate

Format:

RLN

Description:

Requests the modem to return the list of stored numbers

CONNECT INCOMING CALLS

Type:

Immediate

Format:

CIC

Description:

Instructs the modem to answer an incoming call; if no call is currently incoming, a result of INV will be returned.

DISREGARD INCOMING CALL

Type:

Immediate

Format:

DIC

Description:

Instructs the modem to ignore the incoming call, if the modem is set to automatically answer. If no call is currently incoming, a result of INV will be returned.

CALL REQUESTED NUMBER

Type:

Immediate

Format:

CRN<#>

Description:

Dials the number given; it will ignore spaces and hyphens in the string; if the string is more than twenty characters long, a result of INV will be returned.

CALL REQUEST WITH ADDRESS

Type:

Immediate

Format:

CRSn

Description:

Dials the number stored in memory n after checking the forbidden and delayed lists

PROGRAM NUMBER

Type:

Configuration

Format:

PRNn<#>

Description:

Stores a phone number in memory address n; if the number is more than twenty characters long, a result of INV will be returned.

REQUEST LIST OF DELAYED NUMBERS

Type:

Immediate

Format:

RLD

Description:

Requests the list of delayed numbers from the modem; this is a list of numbers that the modem attempted to call and failed, and is not allowed to call again until a set amount of time has elapsed; this is usually to prevent repeated dialing of a number (which could indicate an attempted security breach.) If this feature is not enabled, the modem will return INV.

REQUEST LIST OF FORBIDDEN NUMBERS

Type:

Immediate

Format:

RLF

Description:

Requests the list of forbidden numbers; the modem is unable to dial numbers on this list until it has been reset(power off/on); if this feature is not enabled, the modem will return INV.

V.25BIS COMMAND SET RESULT CODES

CALL FAILURE INDICATOR

Type:

Response

Format:

CFIxx

Description:

Indicates that the attempt to connect failed

Response

Name

Description

CFIET

Engaged Tone

A busy signal was detected

CFIAB

Abort

The call was aborted because no dialtone was detected

CFINT

No Tone

The remote party did not issue a response tone

CFIFC

Forbidden Call

The number given is on the forbidden list

CFINS

Not Stored

The phone number given wasnít in memory

CFIUA

User Abort

The user aborted the call using a character from the host computer

CFIND

Dial Tone

A dial tone was not detected

CFIFF

Forbidden list

The forbidden list is full

INCOMING CALL

Type:

Response

Format:

INC

Description:

An incoming call has been detected

VALID

Type:

Response

Format:

VAL

Description:

The command issued is valid and is being executed

INVALID

Type:

Response

Format:

INV

Description:

The modem was issued an improper command

DELAYED CALL

Type:

Response

Format:

DLCn

Description:

The telephone number given is on the delayed call list; the call cannot be completed until n minutes elapse.

CONNECTION

Type:

Response

Format:

CONn

Description:

A connection has been successfully established at the speed n

LIST OF STORED NUMBERS

Type:

Response

Format:

LSNn<#>

Description:

This code is given in response to a RLN command; it indicates that the number is in V.25bis memory.

LIST OF STORED DELAYED NUMBERS

Type:

Response

Format:

LSDn<#>

Description:

This code is given in response to a RLD command; it indicates that the number cannot be redialed for n minutes.

LIST OF STORED FORBIDDEN NUMBERS

Type:

Response

Format:

LSFn<#>

Description:

This code is given in response to a RLF command; it indicates that the number is on the forbidden list and cannot be dialed.