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MT1932ZPX

MULTITECH SYSTEMS, INC.

MT1932ZPX

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

19.2Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

16-bit ISA

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

Line in

CN1

INTERRUPT SELECTION

IRQ

JP1/A

JP1/B

JP1/C

JP1/D

JP1/E

JP1/F

JP1/G

JP1/H

JP1/I

JP1/J

í3

Closed

Open

Open

Open

Open

Open

Open

Open

Open

Open

4

Open

Closed

Open

Open

Open

Open

Open

Open

Open

Open

5

Open

Open

Closed

Open

Open

Open

Open

Open

Open

Open

7

Open

Open

Open

Closed

Open

Open

Open

Open

Open

Open

2 or 9

Open

Open

Open

Open

Closed

Open

Open

Open

Open

Open

10

Open

Open

Open

Open

Open

Closed

Open

Open

Open

Open

11

Open

Open

Open

Open

Open

Open

Closed

Open

Open

Open

12

Open

Open

Open

Open

Open

Open

Open

Closed

Open

Open

14

Open

Open

Open

Open

Open

Open

Open

Open

Closed

Open

16

Open

Open

Open

Open

Open

Open

Open

Open

Open

Closed

BASE I/O ADDRESS SELECTION

Address

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

100h

On

On

On

On

On

Off

On

108h

Off

On

On

On

On

Off

On

110h

On

Off

On

On

On

Off

On

118h

Off

Off

On

On

On

Off

On

120h

On

On

Off

On

On

Off

On

2E8h (COM4:)

Off

On

Off

Off

Off

On

Off

í 2F8h (COM2:)

Off

Off

Off

Off

Off

On

Off

3D8h

Off

Off

On

Off

Off

Off

Off

3E0h

On

On

Off

Off

Off

Off

Off

3E8h (COM3:)

Off

On

Off

Off

Off

Off

Off

3F0h

On

Off

Off

Off

Off

Off

Off

3F8h (COM1:)

Off

Off

Off

Off

Off

Off

Off

Note: A total of 127 memory base I/O address settings are available. The switches are a binary representation of the hexadecimal addresses. Switch SW1/1 is the Least Significant Bit and switch SW1/7 is the Most Significant Bit. The switches have the following decimal values: switch SW1/1=8, SW1/2=16, SW1/3=32, SW1/4=64, SW1/5=128, SW1/6=256, SW1/7=512.Turn off the switches and add the values of the off switches to obtain the correct base I/O address. (on=0, off=1)

FACTORY CONFIGURED - DO NOT ALTER

Switch

Position

SW1/8

On

Proprietary 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.

Command

Function

í$A0

Data is discarded.

$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.

Command

Function

í $EB0

Sets 10-bit mode.

$EB1

Sets 11-bit mode.

CARRIER MODE

Type:

Configuration

Format:

AT [cmds] &Cn [cmds]

Example:

AT &C0 A<CR>

Description:

Sets the function of the Carrier Detect (CD) signal.

Command

Function

&C0

Forces CD high.

í&C1

CD signal follows carrier.

&C2

Forces CD low for time in S24 when the modem disconnects.

&C4

Resets modem when CD goes low.

COMMAND ESCAPE TYPE

Type:

Configuration

Format:

AT [cmds] %En [cmds]

Example:

AT %E3 &W<CR>

Description:

Sets type and response of command escape sequence.

Command

Function

%E0

Command escape disabled.

í%E1

TIES escape (+++AT...)

%E2

<BREAK>AT method.

%E3

Both TIES and BREAK methods.

%E4

OK response to command escape disabled.

%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.

Command

Function

í&Q0

Multi-Tech custom command set enabled.

&Q1

Standard Hayes command set enabled.

COMPRESSION

Type:

Configuration

Format:

AT &En

Example:

AT &E15 #L0<CR>

Description:

Selects data compression.

Command

Function

&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.

Command

Function

í#L0

V.42 negotiation enabled.

#L1

MNP negotiation enabled.

#L2

LAP-M negotiation enabled.

#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.

Command

Function

&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.

DSR SIGNAL

Type:

Configuration

Format:

AT [cmds] &SFn [cmds]

Example:

AT &SF0<CR>

Description:

Selects the function of the DSR signal.

Command

Function

í&SF0

DSR is set to CD.

&SF1

DSR is independent of CD.

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.

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.

Command

Function

$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.

FALLBACK MODE

Type:

Configuration

Format:

AT [cmds] #Fn [cmds]

Example:

AT #F1 O<CR>

Description:

Sets direction of fallback.

Command

Function

#F0

Fallback disabled.

#F1

Fallback from 19.2Kbps to 4800bps as line quality degrades.

í#F2

Fallback from 4800bps 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.

Command

Function

í&E10

Normal mode disabled.

&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.

Command

Function

&E3

Flow control disabled.

í&E4

CTS/RTS flow control enabled.

&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.

Command

Function

#A0

Attempts in order: 19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps, 2400bps, 1200bps, 300bps.

#A1

Attempts only 14.4Kbps.

#A2

Attempts in order: 28.8Kbps, 24Kbps, 21.6Kbps, 19.2Kbps, 16.8Kbps, 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.

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.

LOOPBACK

Type:

Configuration

Format:

AT [cmds] &Tn [cmds]

Example:

AT &T5<CR>

Description:

Enables or disables remote digital loopback response.

Command

Function

&T4

Loopback response enabled.

&T5

Loopback response disabled.

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

AT [cmds] &BSn [cmds]

Example:

AT &BS1 &MB28800<CR>

Description:

Sets the maximum transmittable block size.

Command

Function

&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.

Command

Function

&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.

Command

Function

í&E8

Enables ENQ/ACK pacing.

&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.

Command

Function

$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.

Command

Function

í$R0

Hang up after 12 failed retransmissions.

$R1

Do not hang up after 12 failed retransmissions.

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.

TRELLIS MODULATION

Type:

Configuration

Format:

AT [cmds] #Tn [cmds]

Example:

AT #T1<CR>

Description:

Controls Trellis Coded Modulation.

Command

Function

#T0

Disables TCM.

í#T1

Enables TCM.

V.42 MODE

Type:

Configuration

Format:

AT [cmds] &En [cmds]

Example:

AT &E0 <CR>

Description:

Configures the operation of V.42 mode.

Command

Function

&E0

Error correction disabled.

í&E1

V.42 set to auto-reliable.

&E2

V.42 set to reliable.

V.42 LOW SPEED

Type:

Configuration

Format:

AT [cmds] $En [cmds]

Example:

AT $E1 <CR>

Description:

Selects whether a V.42 connection will be attempted at 300bps.

Command

Function

í$E0

V.42 disabled at 300bps.

$E1

V.42 enabled at 300bps.

XOFF SEND

Type:

Configuration

Format:

AT [cmds] #Xn [cmds]

Example:

AT #X1<CR>

Description:

Selects how XOFF signal is sent.

Command

Function

í#X0

Single XOFF character sent until ready.

#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.

Command

Function

í&E6

XON/XOFF signals trapped by local modem.

&E7

XON/XOFF passed through local modem.