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MX-2400

CALPAK CORPORATION

MX-2400

Modem Type

Data (synchronous/asynchronous)

Maximum Data Rate

2400bps

Data Bus

8-bit ISA

Data Modulation Protocol

Unidentifed

CONNECTIONS

Purpose

Location

Purpose

Location

Line out

CN1

Line in

CN2

BASE I/O ADDRESS SELECTION

Port

SW1/A

SW1/C

SW1/E

SW1/F

COM1: (3F8h)

Off

On

Off

On

COM2: (2F8h)

On

Off

Off

On

COM3: (3E8h)

Off

On

On

Off

COM4: (2E8h)

On

Off

On

Off

INTERRUPT SELECTION

IRQ

SW/B

SW1/D

JP1

3

On

Off

Pins 2 & 4 closed

4

Off

On

Pins 2 & 4 closed

5

Off

Off

Pins 3 & 4 closed

7

Off

Off

Pins 1 & 2 closed

Note: Location of JP1 is unidentified.

Proprietary AT Command Set

BIT-MAPPED REGISTER S14

Format

AT [cmds] S14=n [cmds]

Example:

ATS14=0<CR>

Default:

Unidentified

Range:

0-174

Unit:

Bit-mapped

Description:

Controls echo, result codes, result code display, dial mode, smart/dumb mode and answer/originate mode.

Bit

Value

Function

0

0

Not used.

1

0

1

Command echo disabled.

Command echo enabled.

2

0

1

Result codes enabled.

Result codes disabled.

3

0

1

Display result codes in numeric format.

Display result codes in verbose format.

4

0

1

Smart mode.

Dumb mode.

5

0

1

Tone dial enabled.

Pulse dial enabled.

6

0

Not used.

7

0

1

Answer mode enabled.

Originate mode enabled.

BIT-MAPPED REGISTER S21

Format

AT [cmds] S21=n [cmds]

Example:

ATS21=0<CR>

Default:

Unidentified

Range:

0-253

Unit:

Bit-mapped

Description:

Selects jack type, CTS signal, low DTR action, DCD signal, DSR signal, and the Long Space Disconnect function.

Bit

Value

Function

0

0

1

Selects RJ-11 jack.

Not used.

1

0

1

Serial

Paralell

2

0

1

CTS follows RTS.

CTS forced high (synchronous only).

4, 3

00

01

10

11

DTR signal ignored.

Modem goes to command mode on low DTR.

Modem disconnects on low DTR. Auto-Answer is disabled.

Modem is initialized on low DTR.

5

0

1

DCD forced high.

DCD normal.

6

0

1

DSR forced high.

DSR normal.

7

0

1

Long Space Disconnect function disabled.

Long Space Disconnect function enabled.

BIT-MAPPED REGISTER S22

Format

AT [cmds] S22=n [cmds]

Example:

ATS22=0<CR>

Default:

Unidentified

Range:

0-127

Unit:

Bit-mapped

Description:

Controls speaker volume and controls, and limits results codes.

Bit

Value

Function

1, 0

00

01

10

11

Off volume.

On volume.

Medium level volume.

High level volume.

3, 2

00

01

10

11

Speaker off.

Speaker off on carrier.

Speaker always on.

Speaker on during handshake.

6, 5, 4

000

100

101

110

111

Basic result codes only enabled.

Basic and connection speed result codes enabled.

Basic and connection speed result codes and dialtone detection enabled.

All result codes except dialtone detection enabled.

All result codes enabled.

BIT-MAPPED REGISTER S23

Format

AT [cmds] S23=n [cmds]

Example:

ATS23=0<CR>

Default:

Unidentified

Range:

0-189

Unit:

Bit-mapped

Description:

Grants/denies remote digital loopback, controls DTE rate and parity, and sets guard tone.

Bit

Value

Function

0

0

1

Remote digital loopback denied.

Remote digital loopback allowed.

3, 2, 1

00

01

10

11

Sets serial port speed to 0-300bps.

Sets serial port speed to 600bps.

Sets serial port speed to 1200bps.

Sets serial port speed to 2400bps..

5,4

00

01

10

11

Parity even.

Space Parity.

Parity odd.

Mark/No Parity.

7, 6

00

01

10

Guard tone disabled.

Guard tone 550Hz enabled.

Guard tone 1800Hz enabled.

BIT-MAPPED REGISTER S27

Format

AT [cmds] S27=n [cmds]

Example:

AT S27=0 <CR>

Default:

Unidentified

Range:

0 - 108

Unit:

Bit-mapped

Description:

Selects sync/async mode, Line type, internal clock, and ITU-T/Bell modes.

Bit

Value

Function

3, 1, 0

000

001

010

011

100

Asynchronous mode, serial port speed follows connect speed.

Asynchronous command mode and synchronous connect mode.

Asynchronous command mode and synchronous connect mode, DTR dialing enabled.

Asynchronous command mode on low DTR, synchronous connect mode on high DTR.

Hayes AutoSync™ mode - serial port locked at 9600bps.

2

0

1

Dial up line.

Leased line.

5, 4

00

01

10

Internal DCE transmit clock source.

External DTE transmit clock source.

Remote DCE transmit clock source.

6

0

1

CCITT mode.

Bell mode.

TEST MODES

Format

AT [cmds] S16=n [cmds]

Example:

ATS16=0<CR>

Default:

Unidentified

Range:

0-125

Unit:

Bit-mapped

Description:

Controls loopback tests, analog, digital, remote digital, and self tests.

Bit

Value

Function

0

0

1

Local analog loopback not in progress.

Local analog loopback in progress.

1

0

Not used.

2

0

1

Local digital loopback not in progress.

Local digital loopback in progress.

3

0

1

Modem not in remote digital loopback.

Remote digital loopback in progress.

4

0

1

Remote digital loopback not requested.

Remote digital loopback requested.

5

0

1

Remote digital loopback w/ self-test not in progress.

Remote digital loopback w/ self-test in progress.

6

0

1

Local analog loopback w/ self-test not in progress.

Local analog loopback w/ self-test in progress.