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MT2834ECT4/MT2834ECT4I

MULTI-TECH SYSTEMS, INC.

MT2834ECT4/MT2834ECT4I

Modem Type

Data (synchronous/asynchronous)/Fax/Voice

NIC Type

Ethernet

Processor

80486SLC

Maximum Modem Transfer Rate

28.8Kbps

Maximum Fax Transfer Rate

14.4Kbps

Maximum NIC Transfer Rate

10Mbps

Processor Speed

25MHz

Data Bus

N/A (see technical note)

Topology

Linear Bus/Star

Fax Class

Class I & II

Wiring Type

Unshielded twisted pair

RG-58A/U 50ohm coaxial

Data Modulation Protocol

Bell 103A/212A

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

Fax Modulation Protocol

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

Error Correction/Compression

MNP5, V.42, V.42bis

Boot ROM

Available

Max. Onboard DRAM

16MB

CONNECTIONS

Purpose

Location

Purpose

Location

Daughterboard connectors

CN1 & CN1A

Keyboard

CN6

Line out

CN2

VGA video out

CN7

RG-58A/U 50ohm coaxial

CN3

Power

CN8

Unshielded twisted pair

CN4

Flash BIOS for modem

FLASH

Serial port

CN5

Power switch

SW1

CABLE TYPE SELECTION

» Cable Type

JP2

»

RG-58A/U 50ohm coaxial

Pins 1 & 2 closed

»

Unshielded twisted pair

Pins 2 & 3 closed

LOSS OF CARRIER REBOOT CONFIGURATION

» Setting

JP1

»

Modem will not reboot on loss of carrier

Open

»

Modem will reboot on loss of carrier

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

2MB

(2) 1M x 9

NONE

4MB

(2) 1M x 9

(2) 1M x 9

8MB

(2) 4M x 9

NONE

16MB

(2) 4M x 9

(2) 4M x 9

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

SD

Red

On

Modem is transmitting on phone line

SD

Red

Off

Modem is not transmitting on phone line

RD

Red

On

Modem is receiving on phone line

RD

Red

Off

Modem is not receiving on phone line

CD

Red

On

Carrier signal detected

CD

Red

Off

Carrier signal not detected

28

Red

On

Modem connected at 28.8Kbps

28

Red

Off

Modem not connected at 28.8Kbps

14

Red

On

Modem connected at 14.4Kbps

14

Red

Off

Modem not connected at 14.4Kbps

96

Red

On

Modem connected at 9600bps

96

Red

Off

Modem not connected at 9600bps

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

DIAGNOSTIC LED(S) (CON’T)

EC

Red

On

Modem connected with error correction

EC

Red

Off

Modem not connected with error correction

EC

Red

Blinking

Modem connected with error correction/compression

FX

Red

On

Modem is connected in FAX mode

FX

Red

Off

Modem is not connected in FAX mode

PWR

Red

On

Power is on

PWR

Red

Off

Power is not on

TP

Red

On

RG-58A/U port active

TP

Red

Off

UTP port active

LNK

Yellow

On

RG-58A/U link is good

LNK

Yellow

Off

RG-58A/U link is not good

RX

Red

On

Modem is receiving on network

RX

Red

Off

Modem is not receiving on network

TX

Red

On

Modem is transmitting on network

TX

Red

Off

Modem is not transmitting on network

MISCELLANEOUS TECHNICAL NOTE

This is a standalone network modem, designed to let other workstations share this modem and an additional one connected to the serial port.

Proprietary AT Command Set

AUTO-RELIABLE TIME BUFFER CONFIGURATION

Type:

Configuration

 

Format:

AT [cmds] $A n [cmds]

 

Example:

AT $A1 &W <CR>

 

Description:

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

»

Command

Function

»

$A0

Data is discarded.

»

$A1

Data is buffered.

BIT MODE

Type:

Configuration

 

Format:

AT [cmds] $EB n [cmds]

 

Example:

AT $EB1 E1 <CR>

 

Description:

Selects 10- or 11-bit mode.

»

Command

Function

»

$EB0

Sets 10-bit mode.

»

$EB1

Sets 11-bit mode.

CALLBACK PARITY

Type:

Configuration

 

Format:

AT [cmds] #P n [cmds]

 

Example:

AT #P0 #DB1 <CR>

 

Description:

Sets the parity of the modem when in callback mode.

»

Command

Function

»

#P0

No parity.

»

#P1

Odd parity.

»

#P2

Even parity.

CALLBACK PASSWORD

Type:

Configuration

Format:

AT [cmds] #CBN nnxxxx

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] #DB n [cmds]

 

Example:

AT #DB1 S0=1 <CR>

 

Description:

Sets the security level of the callback function.

»

Command

Function

»

#DB0

Disables security and clears callback memory.

»

#DB1

Enables remote security only.

»

#DB2

Enables local and remote security.

CALLER ID INFORMATION TRANSMISSION

Type:

Configuration

 

Format:

AT [cmds] &A n [cmds]

 

Example:

AT &A1 <CR>

 

Description:

Controls the transmission of Caller ID information stored in the EPROM. The ID must be inserted into the Flash BIOS image before burning.

»

Command

Function

»

&A0

Caller ID information transmission disabled.

»

&A1

Caller ID information transmission enabled.

CALLING TONE

Type:

Configuration

 

Format:

AT [cmds] $T n [cmds]

 

Example:

AT $T1 DT555-1212 <CR>

 

Description:

Controls the transmission of the calling tone while dialing.

»

Command

Function

»

$T0

Calling tone enabled.

»

$T1

Calling tone disabled.

COMMAND SET

Type:

Configuration

 

Format:

AT &Q n

 

Example:

AT &Q1 <CR>

 

Description:

Selects standard Hayes or custom command sets.

»

Command

Function

»

&Q0

Multi-Tech custom command set enabled.

»

&Q1

Standard Hayes command set enabled.

COMPRESSION

Type:

Configuration

 

Format:

AT &E n

 

Example:

AT &E15 #L0 <CR>

 

Description:

Selects data compression.

»

Command

Function

»

&E14

Data compression disabled.

»

&E15

Data compression enabled.

COMPRESSION MODE

Type:

Configuration

 

Format:

AT #L n

 

Example:

AT #L2 DT555-1212 <CR>

 

Description:

Selects active compression protocols.

»

Command

Function

»

#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] &RF n [cmds]

 

Example:

AT &RF0 <CR>

 

Description:

Selects the function of the CTS signal.

»

Command

Function

»

&RF0

CTS is set to RTS.

»

&RF1

CTS is independent of RTS.

DIAL STORED PHONE NUMBER

Type:

Immediate

Format:

AT [cmds] N n1 [N n2 , N n3 ...]

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] &SF n [cmds]

 

Example:

AT &SF0 <CR>

 

Description:

Selects the function of the DSR signal.

»

Command

Function

»

&SF0

DSR is set to CD.

»

&SF1

DSR is independent of CD.

DTR DIALING

Type:

Configuration

 

Format:

AT [cmds] $D n [cmds]

 

Example:

AT $D1 DT555-1212 <CR>

 

Description:

Turns DTR dialing on and off.

»

Command

Function

»

$D0

DTR dialing disabled.

»

$D1

DTR dialing enabled.

ERASE CALLBACK NUMBER

Type:

Immediate

Format:

AT [cmds] #RDN n [cmds]

Example:

AT #RCBN05 #RDN05 <CR>

Description:

Erases the callback phone number at the memory location specified.

ERASE CALLBACK PASSWORD

Type:

Immediate

Format:

AT [cmds] #RCBN n [cmds]

Example:

AT #RCBN05 #RDN05 <CR>

Description:

Erases the callback password at the memory location specified.

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.

FALLBACK MODE

Type:

Configuration

 

Format:

AT [cmds] #F n [cmds]

 

Example:

AT #F1 O <CR>

 

Description:

Sets direction of fallback.

»

Command

Function

»

#F0

Fallback disabled.

»

#F1

Fallback from 28.8Kbps to 2400bps as line quality degrades.

»

#F2

Fallback from 2400bps to 28.8Kbps as line quality improves.

FLOW CONTROL

Type:

Configuration

 

Format:

AT [cmds] &E n [cmds]

 

Example:

AT &E13 <CR>

 

Description:

Selects flow control.

»

Command

Function

»

&E12

Flow control disabled.

»

&E13

Flow control enabled.

FLOW CONTROL - ENQ/ACK

Type:

Configuration

 

Format:

AT [cmds] &E n [cmds]

 

Example:

AT &E9 <CR>

 

Description:

Selects ENQ/ACK pacing.

»

Command

Function

»

&E8

Enables ENQ/ACK pacing.

»

&E9

Disables ENQ/ACK pacing.

FLOW CONTROL IN NORMAL MODE

Type:

Configuration

 

Format:

AT [cmds] &E n [cmds]

 

Example:

AT &E11 O <CR>

 

Description:

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

»

Command

Function

»

&E10

XON/XOFF disabled for non-error-correcting connections.

»

&E11

XON/XOFF enabled for non-error-correcting connections.

FLOW CONTROL TYPE

Type:

Configuration

 

Format:

AT [cmds] &E n [cmds]

 

Example:

AT &E4 &W <CR>

 

Description:

Sets type of flow control used by modem.

»

Command

Function

»

&E3

Flow control disabled.

»

&E4

CTS/RTS flow control enabled.

»

&E5

XON/XOFF flow control enabled.

HANDSHAKE ATTEMPTS

Type:

Configuration

 

Format:

AT [cmds] #A n [cmds]

 

Example:

AT #A1 #L3 <CR>

 

Description:

Configures the initial handshake phase.

»

Command

Function

 

#A0

Attempts in order: 28.8Kbps, 24Kbps, 21.6Kbps, 19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps, 2400bps, 1200bps, 300bps.

 

#A1

Attempts only 28.8Kbps.

 

#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 $H n

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 L n

Example:

AT L5 <CR>

Description:

Lists modem configuration.

Command

Function

L

Lists all stored phone numbers.

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] $SB nnn [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.

LOCK SERIAL PORT

Type:

Configuration

 

Format:

AT [cmds] $BA n [cmds]

 

Example:

AT $SB57600 $BA0 <CR>

 

Description:

Sets operation of serial port speed.

»

Command

Function

»

$BA0

Serial speed locked at rate set by $SB.

»

$BA1

Serial speed follows connect speed, ignoring $SB.

LOGIN PASSWORD

Type:

Configuration

Format:

AT [cmds] #I xxxx

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] &BS n [cmds]

 

Example:

AT &BS1 &MB28800 <CR>

 

Description:

Sets the maximum transmittable block size.

»

Command

Function

»

&BS0

Maximum block size is 64 characters.

»

&BS1

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

REDIAL

Type:

Immediate

Format:

ATA:

Example:

AT A: <CR>

Description:

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

REMOTE CONNECT SPEED

Type:

Configuration

 

Format:

AT $MB nnn

 

Example:

AT $MB9600 $SB19200 <CR>

 

Description:

Sets maximum remote connect speed.

»

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.

 

$MB28800

Sets 28.8Kbps connect.

RETRANSMIT FAIL ACTION

Type:

Configuration

 

Format:

AT [cmds] $R n [cmds]

 

Example:

AT $R1 <CR>

 

Description:

Sets whether the modem gives up on a bad connection.

»

Command

Function

»

$R0

Hang up after 12 failed retransmissions.

»

$R1

Do not hang up after 12 failed retransmissions.

SETUP PASSWORD

Type:

Configuration

Format:

AT [cmds] #S xxxx

Example:

AT #SsNaFu <CR>

Description:

Sets the setup password to xxxx . The password must be between 6 and 10 characters, case sensitive. It defaults to MODEMSETUP.

STORE PHONE NUMBER IN NVRAM

Type:

Configuration

Format:

AT [cmds] D <#> N n [dialstring]

Example:

AT D555-1212N1 <CR>

Description:

Stores a phone number in the modem’s memory.

TRELLIS MODULATION

Type:

Configuration

 

Format:

AT [cmds] #T n [cmds]

 

Example:

AT #T1 <CR>

 

Description:

Controls Trellis Coded Modulation.

»

Command

Function

»

#T0

Disables TCM.

»

#T1

Enables TCM.

UUCP SPOOFING

Type:

Configuration

 

Format:

AT [cmds] $SP n [cmds]

 

Example:

AT $SP1 O <CR>

 

Description:

Controls the UUCP spoofing function.

»

Command

Function

»

$SP0

Spoofing disabled.

»

$SP1

Spoofing enabled.

XON/XOFF PASS-THROUGH

Type:

Configuration

 

Format:

AT [cmds] &E n [cmds]

 

Example:

AT &E7 O <CR>

 

Description:

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

»

Command

Function

»

&E6

XON/XOFF signals trapped by local modem.

»

&E7

XON/XOFF passed through local modem.

XOFF SEND

Type:

Configuration

 

Format:

AT [cmds] #X n [cmds]

 

Example:

AT #X1 <CR>

 

Description:

Selects how XOFF signal is sent.

»

Command

Function

»

#X0

Single XOFF character sent until ready.

»

#X1

Multiple XOFF characters sent until ready.