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MT1932BL/MT1932BLI/MT1932BL-MAC

MULTITECH SYSTEMS, INC.

MT1932BL/MT1932BLI/MT1932BL-MAC

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

19.2Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

External

Fax Class

Class I & II

Data Modulation Protocol

Bell 103A/212A

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

AT&T V.32terbo

Fax Modulation Protocol

ITU-T V.17, V.21CH2, V.27ter, V.29

Error Correction/Compression

MNP2-5, V.42, V.42bis

CONNECTIONS

Purpose

Location

Purpose

Location

Line in

CN1

DC power

CN4

Line out

CN2

Volume

R1

RS-232/422

CN3

Power switch

SW4

ORIGINATE MODE

Mode

SW3

Originate

Off

Answer

On

DTR MODE

í Mode

SW1/1

í DTR normal

On

í DTR forced high

Off

FLOW CONTROL

í Mode

Async/Sync

SW1/2

í Hardware flow control

Async

On

í Software flow control

Async

Off

í SDLC

Sync

On

í BSC

Sync

Off

RESULT CODES and LINE ATTENUATION

í Mode

Switched/Leased

SW1/3

í Result codes enabled

Switched

Off

í Result codes disabled

Switched

On

í Transmit at 0dB

Leased

Off

í Transmit at -10dB

Leased

On

UUCP SPOOFING and AS/400 MODE

í Mode

Async/Sync

SW1/4

í UUCP spoofing disabled

Async

On

í UUCP spoofing enabled

Async

Off

AS/400 disabled

Sync

On

AS/400 enabled

Sync

Off

AUTO-ANSWER and ANSWER/ORIGINATE

í Mode

Switched/Leased

SW1/5

í Auto-answer enabled

Switched

On

í Auto-answer disabled

Switched

Off

í Answer mode

Leased

On

í Originate mode

Leased

Off

EFFICIENCY MODE and SLAVE CLOCK

í Mode

Async/Sync

SW1/6

í Modem set to maximum effiency

Async

On

í Modem not set to maximum effiency

Async

Off

í Clock controlled remotely

Sync

On

í Clock controlled locally

Sync

Off

RTS MODE

í Mode

SW1/7

í RTS forced high

Off

í RTS normal

On

COMMAND MODE

í Mode

SW1/8

í Command mode enabled

Off

í Command mode disabled

On

LOOPBACK MODE

í Mode

SW1/9

í Remote loopback

Off

í Local loopback

On

LINE TYPE

í Type

SW1/10

í Switched

On

í Leased

Off

RESULT CODE TYPE and CLOCK SOURCE

í Mode

Async/Sync

SW1/11

í Multitech result codes

Async

Off

í AT result codes

Async

On

í Internal clock

Sync

Off

í External clock

Sync

On

ASYNCHRONOUS/SYNCHRONOUS MODE

í Mode

SW1/12

í Asynchronous

Off

í Synchronous

On

OPERATION SPEED

í Speed

SW2/1

SW2/2

í 19.2Kbps

On

On

í 14.4Kbps

Off

On

í 9600bps

On

Off

í 2400bps

Off

Off

CD/DSR MODE

Mode

SW2/3

í CD and DSR normal

On

í CD and DSR forced high

Off

LEASED LINE TYPE

Mode

SW2/4

2-wire

On

4-wire

Off

NVRAM WRITE PROTECTION

í Mode

JP1

í Disabled

Pins 1 & 2 closed

í Enabled

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

19.2

Red

On

Modem connected at 19.2Kbps

19.2

Red

Off

Modem not connected at 19.2Kbps

14.4

Red

On

Modem connected at 14.4Kbps

14.4

Red

Off

Modem not connected at 14.4Kbps

96

Red

On

Modem connected at 9600bps

96

Red

Off

Modem not connected at 9600bps

96

Red

On

Modem connected at 9600bps

96

Red

Off

Modem not connected at 9600bps

24

Red

On

Modem connected at 2400bps

24

Red

Off

Modem not connected at 2400bps

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

EC

Red

On

Error correction enabled

EC

Red

Off

Error correction disabled

EC

Red

Blinking

Error correction activated

FX

Red

On

Modem is connected in FAX mode

FX

Red

Off

Modem is not connected in FAX mode

ER

Red

On

Test failed or leased line connection not OK

ER

Red

Off

Test did not fail and/or leased line connection OK

Proprietary AT Command Set

AUTO-RELIABLE TIME BUFFER CONFIGURATION

Type:

Configuration

Format:

AT [cmds] $An [cmds]

Example:

AT $A1 &W<CR>

Description:

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

í Command

Function

í $A0

Data is discarded.

í $A1

Data is buffered.

BIT MODE

Type:

Configuration

Format:

AT [cmds] $EBn [cmds]

Example:

AT $EB1 E1<CR>

Description:

Selects 10- or 11-bit mode.

í Command

Function

í $EB0

Sets 10-bit mode.

í $EB1

Sets 11-bit mode.

CALLBACK ATTEMPTS

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Example:

ATS16=6<CR>

Default:

4

Range:

1-255

Unit:

1 attempt

Description:

Sets the maximum number of login attempts after initial callback connection.

CALLBACK NUMBER

Type:

Configuration

Format:

AT [cmds] [+/-]DT<#>Nnn

Examples:

AT#DB2 +-DT555-1212N10<CR>

Description:

Sets the phone number associated with the password at memory location nn.

Command

Function

+DT

Modem will initiate callback on successful login.

-DT

Modem will allow immediate entry on successful login without callback.

+-DT

If password is followed by a -, modem will allow immediate entry. If password is followed by a + or nothing, modem will initiate callback.

CALLBACK PARITY

Type:

Configuration

Format:

AT [cmds] #Pn [cmds]

Example:

AT #P0 #DB1<CR>

Description:

Sets the parity of the modem when in callback mode.

í Command

Function

í #P0

No parity.

í #P1

Odd parity.

í #P2

Even parity.

CALLBACK PASSWORD

Type:

Configuration

Format:

AT [cmds] #CBNnnxxxx

Example:

AT#DB2 #CBN09snarf<CR>

Description:

Sets the callback password at memory location nn to xxxx. The password must be between 6 and 10 characters, inclusive.

CALLBACK SECURITY

Type:

Configuration

Format:

AT [cmds] #DBn [cmds]

Example:

AT #DB1 S0=1<CR>

Description:

Sets the security level of the callback function.

í Command

Function

í #DB0

Disables security and clears callback memory.

í #DB1

Enables remote security only.

í #DB2

Enables local and remote security.

COMMAND ESCAPE TYPE

Type:

Configuration

Format:

AT [cmds] %En [cmds]

Example:

AT %E3 &W<CR>

Description:

Sets type and response of command escape sequence.

í Command

Function

í %E0

Command escape disabled.

í %E1

TIES escape (+++AT...)

í %E2

<BREAK>AT method.

í %E3

Both TIES and BREAK methods.

í %E4

OK response to command escape disabled.

í %E5

OK response to command escape enabled.

COMMAND SET

Type:

Configuration

Format:

AT &Qn

Example:

AT &Q1<CR>

Description:

Selects standard Hayes or custom command sets.

í Command

Function

í &Q0

Multi-Tech custom command set enabled.

í &Q1

Standard Hayes command set enabled.

COMPRESSION

Type:

Configuration

Format:

AT &En

Example:

AT &E15 #L0<CR>

Description:

Selects data compression.

í Command

Function

í &E14

Data compression disabled.

í &E15

Data compression enabled.

COMPRESSION MODE

Type:

Configuration

Format:

AT #Ln

Example:

AT #L2 DT555-1212<CR>

Description:

Selects active compression protocols.

í Command

Function

í #L0

V.42 negotiation enabled.

í #L1

MNP negotiation enabled.

í #L2

LAP-M negotiation enabled.

í #L3

LAP-M enabled, no negotiation.

CTS SIGNAL

Type:

Configuration

Format:

AT [cmds] &RFn [cmds]

Example:

AT &RF0<CR>

Description:

Selects the function of the CTS signal.

í Command

Function

í &RF0

CTS is set to RTS.

í &RF1

CTS is independent of RTS.

DIAL STORED PHONE NUMBER

Type:

Immediate

Format:

AT [cmds] Nn1 [Nn2, Nn3...]

Example:

ATM0 N1N3N5<CR>

Description:

Dials stored phone number(s). If the first number is busy, the modem will proceed to the next number in the list.

DIALING MODE

Type:

Configuration

Format:

AT [cmds] $VDn [cmds]

Example:

AT $VD <CR>

Description:

Selects voice/data mode dialing.

í í Command

Function

í $VD0

Disables voice/data mode.

í $VD1

Enables voice/data mode.

DSR SIGNAL

Type:

Configuration

Format:

AT [cmds] &SFn [cmds]

Example:

AT &SF0<CR>

Description:

Selects the function of the DSR signal.

í Command

Function

í &SF0

DSR is set to CD.

í &SF1

DSR is independent of CD.

DTR DIALING

Type:

Configuration

Format:

AT [cmds] $Dn [cmds]

Example:

AT $D1 DT555-1212<CR>

Description:

Turns DTR dialing on and off.

í Command

Function

í $D0

DTR dialing disabled.

í $D1

DTR dialing enabled.

DTR TIMEOUT

Type:

Register

Format:

AT [cmds] S24=n [cmds]

Example:

ATS24=40<CR>

Default:

20

Range:

0-255

Unit:

50 ms

Description:

Sets the time to drop the DTR signal to hangup.

ERASE CALLBACK PASSWORD

Type:

Immediate

Format:

AT [cmds] #RCBNn [cmds]

Example:

AT #RCBN05 #RDN05<CR>

Description:

Erases the callback password at the memory location specified.

ERASE CALLBACK NUMBER

Type:

Immediate

Format:

AT [cmds] #RDNn [cmds]

Example:

AT #RCBN05 #RDN05<CR>

Description:

Erases the callback phone number at the memory location specified.

ERROR CORRECTION DISABLE ON CONNECT

Type:

Configuration

Format:

AT [cmds] $Fn [cmds]

Example:

AT $F1 DT555-1212<CR>

Description:

Selects whether error correction can be disabled by a <CR> while handshaking.

í Command

Function

í $F0

Error correction handshake interrupt disabled.

í $F1

Error correction handshake interrupt enabled.

ESCAPE SEQUENCE BUFFER SIZE

Type:

Register

Format:

AT [cmds] S34=n [cmds]

Example:

ATS34=30<CR>

Default:

10

Range:

0-60

Unit:

1 byte

Description:

Sets the size of the buffer used to store commands during an escape sequence.

ESCAPE SEQUENCE - OUT OF BAND

Type:

Immediate

Format:

<BREAK> AT [cmds]<CR>

Example:

<BREAK> AT #F1<CR>

Description:

Puts the modem in Command Mode.

Notes:

Do not precede this command with AT.

<BREAK> refers to the hardware modem break signal.

ESCAPE SEQUENCE TIMEOUT

Type:

Register

Format:

AT [cmds] S32=n [cmds]

Example:

ATS32=30<CR>

Default:

20

Range:

0-255

Unit:

1 second

Description:

Sets the maximum amount of time the modem will wait for a <CR> while executing an escape sequence.

FACTORY DEFAULTS

Type:

Immediate/Configuration

Format:

AT &F[n]

Example:

AT &F8<CR>

Description:

Loads factory defaults, or sets write protect on NVRAM.

í Command

Function

í &F

Reloads defaults by setting. (Immediate, see below.)

í &F8

Sets &F to read factory defaults from ROM, and disables NVRAM write protect.

í &F9

Sets &F to read defaults from NVRAM, and enables write-protect.

FAILED PASSWORD ATTEMPTS

Type:

Register

Format:

AT [cmds] S26?

Example:

ATS26?<CR>

Default:

Read-only

Range:

0-255

Unit:

1 attempt

Description:

This register stores the number of failed password attempts.

FALLBACK MODE

Type:

Configuration

Format:

AT [cmds] #Fn [cmds]

Example:

AT #F1 O<CR>

Description:

Sets direction of fallback.

í Command

Function

í #F0

Fallback disabled.

í #F1

Fallback from 19.2Kbps to 2400bps as line quality degrades.

í #F2

Fallback from 2400bps to 19.2Kbps as line quality improves.

FLOW CONTROL NORMAL MODE

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Example:

AT &E11 O<CR>

Description:

Selects normal flow control.

í Command

Function

í &E10

Normal mode disabled.

í &E11

Normal mode enabled.

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Example:

AT &E4 &W<CR>

Description:

Sets type of flow control used by modem.

í Command

Function

í &E3

Flow control disabled.

í &E4

CTS/RTS flow control enabled.

í &E5

XON/XOFF flow control enabled.

HANDSHAKE ATTEMPTS

Type:

Configuration

Format:

AT [cmds] #An [cmds]

Example:

AT #A1 #L3<CR>

Description:

Configures the initial handshake phase.

í Command

Function

#A0

Attempts in order: 19.2Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps, 2400bps, 1200bps, 300bps.

#A1

Attempts only 9600bps.

#A2

Attempts in order: 19.2Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps.

#A3

Attempts in order: 2400bps, 1200bps, 300bps.

HELP SCREENS

Type:

Immediate

Format:

AT $Hn

Example:

AT $H1<CR>

Description:

Shows modem help screens.

Command

Function

$H1

Shows help screen 1.

$H2

Shows help screen 2.

$H3

Shows help screen 3.

LIST CONFIGURATION

Type:

Immediate

Format:

AT Ln

Example:

AT L5<CR>

Description:

Lists modem configuration.

Command

Function

L5

Lists all settings.

L6

Lists the values of all S-registers.

L7

Lists extended parameters.

L8

Lists current diagnostics.

LOCAL SERIAL PORT SPEED

Type:

Configuration

Format:

AT [cmds] $SBnnn [cmds]

Example:

AT $MB9600 $SB19200<CR>

Description:

Sets serial port speed.

í Command

Function

$SB300

Sets 300bps speed.

$SB1200

Sets 1200bps speed.

$SB2400

Sets 2400bps speed.

$SB4800

Sets 4800bps speed.

$SB9600

Sets 9600bps speed.

$SB19200

Sets 19.2Kbps speed.

$SB38400

Sets 38.4Kbps speed.

$SB57600

Sets 57.6Kbps speed.

$SB115200

Sets 115.2Kbps speed.

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] $BAn [cmds]

Example:

AT $SB57600 $BA0<CR>

Description:

Sets operation of serial port speed.

í Command

Function

í $BA0

Serial speed locked at rate set by $SB.

í $BA1

Serial speed follows connect speed, ignoring $SB.

LOGIN PASSWORD

Type:

Configuration

Format:

AT [cmds] #Ixxxx

Example:

AT #IMicroHouse<CR>

Description:

Sets the login password to xxxx. The password must be between 6 and 10 characters, case sensitive. It defaults to MULTI-TECH.

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

AT [cmds] &BSn [cmds]

Example:

AT &BS1 &MB28800<CR>

Description:

Sets the maximum transmittable block size.

í Command

Function

í &BS0

Maximum block size is 64 characters.

í &BS1

Maximum block size is 128 characters for LAP-M, and 256 characters for MNP.

PACING

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Example:

AT &E13<CR>

Description:

Selects ENQ/ACK pacing.

í Command

Function

í &E12

Disables ENQ/ACK pacing.

í &E13

Enables ENQ/ACK pacing.

PACING - ENQ/ACK

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Example:

AT &E9<CR>

Description:

Selects ENQ/ACK pacing.

í Command

Function

í &E8

Enables ENQ/ACK pacing.

í &E9

Disables ENQ/ACK pacing.

REDIAL

Type:

Immediate

Format:

ATA:

Example:

ATA:<CR>

Description:

Redials the last number dialed until it is no longer busy.

REMOTE CONNECT SPEED

Type:

Configuration

Format:

AT $MBnnn

Example:

AT $MB9600 $SB19200<CR>

Description:

Sets maximum remote connect speed.

í Command

Function

$MB75

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

$MB300

Sets 300bps connect.

$MB1200

Sets 1200bps connect.

$MB2400

Sets 2400bps connect.

$MB4800

Sets 4800bps connect.

$MB9600

Sets 9600bps connect.

$MB14400

Sets 14.4Kbps connect.

$MB19200

Sets 19.2Kbps connect.

RETRANSMIT FAIL ACTION

Type:

Configuration

Format:

AT [cmds] $Rn [cmds]

Example:

AT $R1<CR>

Description:

Sets whether the modem gives up on a bad connection.

í Command

Function

í $R0

Hang up after 12 failed retransmissions.

í $R1

Do not hang up after 12 failed retransmissions.

SETUP INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] S29=n [cmds]

Example:

ATS29=5<CR>

Default:

20

Range:

1-255

Unit:

1 minute

Description:

Sets the maximum amount of time between commands until the setup password must be re-entered.

STORE PHONE NUMBER IN NVRAM

Type:

Configuration

Format:

AT [cmds] D<#>Nn [dialstring]

Example:

ATD555-1212N1<CR>

Description:

Stores a phone number in the modemís memory.

TIME UNTIL HANG UP ON LOW DTR

Type:

Register

Format:

AT [cmds] S36=n [cmds]

Example:

ATS36=5<CR>

Default:

0

Range:

0-255

Unit:

1 second

Description:

Sets the maximum amount of time the modem will wait to hang up after the DTR signal goes low.

TIME UNTIL PICK UP ON HIGH DTR

Type:

Register

Format:

AT [cmds] S37=n [cmds]

Example:

ATS37=5<CR>

Default:

0

Range:

0-255

Unit:

1 second

Description:

Sets the maximum amount of time the modem will wait to pick up after the DTR signal goes high.

TRELLIS MODULATION

Type:

Configuration

Format:

AT [cmds] #Tn [cmds]

Example:

AT #T1<CR>

Description:

Controls Trellis Coded Modulation.

í Command

Function

í #T0

Disables TCM.

í #T1

Enables TCM.

V.25 MODE

Type:

Configuration

Format:

AT [cmds] $Vn [cmds]

Example:

AT $V2 CIC<CR>

Description:

Configures V.25bis mode.

í Command

Function

í $V0

Disables V.25bis.

í $V1

Enables V.25bis.

í $V2

Modem will accept one V.25bis command and will then return to AT command mode.

í $V5

DSR follows DTR in V.25bis command mode.

í $V6

DSR operates normally in V.25bis command mode.

V.42 MODE

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Example:

AT &E0 <CR>

Description:

Configures the operation of V.42 mode.

í Command

Function

í &E0

Error correction disabled.

í &E1

V.42 set to auto-reliable.

í &E2

V.42 set to reliable.

XOFF SEND

Type:

Configuration

Format:

AT [cmds] #Xn [cmds]

Example:

AT #X1<CR>

Description:

Selects how XOFF signal is sent.

í Command

Function

í #X0

Single XOFF character sent until ready.

í #X1

Multiple XOFF characters sent until ready.

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Example:

AT &E7 O<CR>

Description:

Selects whether XON/XOFF signals are sent to remote modem.

í Command

Function

í &E6

XON/XOFF signals trapped by local modem.

í &E7

XON/XOFF passed through local modem.

Proprietary V.25bis Command Set

CLEAR MEMORY LOCATION

Type:

Immediate

Format:

CLAn

Example:

CLA05<CR>

Description:

Clears the phone number in memory location nn.

LOCAL SERIAL PORT SPEED

Type:

Configuration

Format:

CSPn

Example:

CSP38400<CR>

Description:

Sets serial port speed.

í 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.

CSP57600

Sets 57.6Kbps speed.

CSP115200

Sets 115.2Kbps speed.

CALL REQUESTED NUMBER

Type:

Immediate

Format:

CRI<#>;n

Example:

CRI1-303 555-1212;fubar<CR>

Description:

Same as CRN. Dials the number given. It will ignore spaces and hyphens in the string. If the string is more than fifty characters long, a result of INV will be returned. The identification string n will be ignored.

REQUEST LISTED NUMBERS

Type:

Immediate

Format:

RLN

Example:

RLN<CR>

Description:

Requests the modem to return the list of stored numbers. If no numbers are stored, the modem will return LSN.