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2400V42 (INTERNAL), 2450V42 (INTERNAL)

CARDINAL TECHNOLOGIES,INC.

2400V42 (INTERNAL), 2450V42 (INTERNAL)

Card Type

Modem (asynchronous)

Chip Set

Unidentified

Maximum Data Rate

2400bps

Data Bus

8-bit ISA

Data Modulation Protocol

Bell 103/212A

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

Error Correction/Compression

MNP5, V.42, V.42bis

CONNECTIONS

Function

Label

Function

Label

Line out/in

CN1

Line in/out

CN2

SERIAL PORT ADDRESS

Setting

IRQ

SW1/A

SW1/B

SW1/C

SW1/D

COM1 (3F8h)

4

Closed

Closed

Closed

Open

COM2 (2F8h)

3

Open

Closed

Open

Closed

COM3 (3E8h)

4

Closed

Open

Closed

Open

COM4 (2E8h)

3

Open

Open

Open

Closed

INTERRUPT SELECTION

Setting

P3

2

Pins 2 & 3 closed

5

Pins 1 & 2 closed

Disabled IRQ2 & IRQ5

Open

SUPPORTED COMMAND SET

Basic AT Commands

AT, ‘+++’, ‘Comma’, A/

A, B, E, H, L, M, O, Q, S, V, X, Y, Z,

&C, &D, &F, &G, &L, &P, &S, &T, &W, &Y, &Z

Extended AT Commands

\A, \B, \C, \G, \J, \L, \O, \U, \X, \Y, \Z

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S16, S18, S25, S26, S37

Special Commands

"H, "O

Note: Please see MHI Help file for full command documentation.

Proprietary AT Command Set

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Configuration

Format:

AT [cmds] %An [cmds]

Default:

Unidentified

Range:

0-127

Unit:

ASCII

Description:

Sets the character used as the auto-reliable fallback character

Note:

AT%A0 will disable this function.

BIT MAPPED REGISTERS

Register

Default

S14

Unidentified

S20

16

S21

Unidentified

S22

Unidentified

S23

Unidentified

S27

Unidentified

S100

Unidentified

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Description:

Configures action of break signal

Command

Break from DTE

Reliable/Normal mode

Break from DTE

Direct mode

Break received from remote modem

Modem receives \B

\K0

Online command mode enabled, send no break to remote modem

Online command mode enabled, send break to remote modem immediately

Buffers cleared, break sent to DTE

Break sent to remote modem and buffers cleared

\K1

Break sent to remote modem and buffers cleared

Send break to remote modem immediately

Buffers cleared, break sent to DTE

Break sent to remote modem and buffers cleared

\K2

Online command mode enabled, send no break to remote modem

Online command mode enabled, send break to remote modem immediately

Break sent immediately to DTE

Send break to remote modem immediately

\K3

Send break to remote modem immediately

Send break to remote modem immediately

Break sent immediately to DTE

Send break to remote modem immediately

\K4

Online command mode enabled, send no break to remote modem

Online command mode enabled, send break to remote modem immediately

Break sent with received data to the DTE

Send break with transmitted data

í \K5

Send break with transmitted data

Send break to remote modem immediately

Break sent with received data to the DTE

Send break with transmitted data

COMPRESSION

Type:

Configuration

Format:

AT [cmds] %Cn [cmds]

Description:

Selects MNP5 data compression

Command

Function

%C0

MNP5 disabled

í %C1

MNP5 enabled

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Description:

Controls the type of connection the modem will operate in

Command

Function

\N0

Normal mode enabled

í \N1

Direct mode enabled

\N2

MNP reliable mode enabled

\N3

Auto-reliable mode enabled

\N4

V.42 reliable mode enabled

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.

Modifier

Function

P

Pulse dialing enabled

R

Answer mode enabled, originate mode disabled following handshake initiation

Sn

Dial stored telephone number n

T

Tone dialing enabled

W

Dialing resumed following dial tone detection

,

Dialing paused for amount of time specified in S8 register

!

Modem commanded to go off-hook for specified time before returning on-hook

@

Wait for quiet answer

;

Modem returned to command state after dialing

DISPLAY CONFIGURATION

Type:

Immediate

Format:

AT [cmds] \S [cmds]

Description:

Displays current modem settings

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] \Vn [cmds]

Description:

Select standard or extended result codes

Command

Function

\V0

Standard result codes enabled

\V1

Extended MNP result codes enabled

\V2

Extended V.42 and MNP result codes enabled

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] \Qn [cmds]

Description:

Sets type of flow control used by modem

Command

Function

í \Q0

Flow control disabled

\Q1

XON/XOFF flow control enabled

\Q2

CTS flow control by DCE enabled

\Q3

RTS/CTS flow control enabled

INACTIVITY TIMER

Type:

Configuration

Format:

AT [cmds] \Tn [cmds]

Default:

0

Range:

0-90

Unit:

1 minute

Description:

Sets the length of time that the modem does not receive information before it disconnects.

Note:

AT\T0 will disable timer.

LINE SPEED

Type:

Configuration

Format:

AT [cmds] %Nn [cmds]

Description:

Controls maximum DCE line speed

Command

Function

í %N0

Enable maximum DCE speed

%N1

Maximum DCE speed set to 300bps

%N2

Maximum DCE speed set to 300bps

%N3

Maximum DCE speed set to 300bps

%N5

Maximum DCE speed set to 1200bps

%N6

Maximum DCE speed set to 2400bps

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested

Command

Function

I0

Reports modem code

I1

Reports ROM checksum

I2

Tests and reports ROM checksum

I3

Reports version information

V.42/MNP - DETECTION PHASE

Type:

Configuration

Format:

AT [cmds] -Jn [cmds]

Description:

Controls V.42/MNP detection

Command

Function

-J0

V.42 detection disabled

í -J1

V.42 detection enabled, then MNP detection

-J2

MNP detection enabled, then LAPM detection

V.42bis - DICTIONARY SIZE

Type:

Configuration

Format:

AT [cmds] "Nn [cmds]

Default:

Unidentified

Range:

512-1024

Unit:

Strings

Description:

Select V.42 dictionary size