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2400BPS EXTERNAL MNP MODEM

CARDINAL TECHNOLOGIES,INC.

2400BPS EXTERNAL MNP MODEM

Card Type

Modem (synchronous/asynchronous)

Chip Set

Unidentified

Maximum Data Rate

2400bps

Data Bus

External

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 in

CN1

DC power

CN4

Line out

CN2

Power switch

SW1

RS-232/422

CN3

   

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

HS

Red

On

Modem is operating at 1200bps or faster

HS

Red

Off

Modem is operating at slower than 1200bps

AA

Red

On

Auto-answer enabled

AA

Red

Off

Auto-answer disabled

AA

Red

Blinking

Phone is ringing

CD

Red

On

Carrier signal detected

CD

Red

Off

Carrier signal not detected

OH

Red

On

Modem is off-hook

OH

Red

Off

Modem is on-hook

RD

Red

On

Modem is receiving data

RD

Red

Off

Modem is not receiving data

SD

Red

On

Modem is transmitting data

SD

Red

Off

Modem is not transmitting data

TR

Red

On

DTR signal is high

TR

Red

Off

DTR signal is low

MR

Red

On

Power is on

MR

Red

Off

Power is off

MR

Red

Blinking

Modem in test mode

Proprietary AT Command Set

ACCEPT RELIABLE MODE

Type:

Immediate

Format:

AT [cmds] \U [cmds]

Description:

Accept remote modemís request for reliable mode

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; %A0 will disable this function.

AUTO-RELIABLE TIME BUFFER CONFIGURATION

Type:

Configuration

Format:

AT [cmds] \Cn [cmds]

Description:

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

Command

Function

í \C0

Data is discarded

\C1

Data is buffered

\C2

Data is discarded; modem returns to normal mode on receiving auto-reliable fallback character.

BIT MAPPED REGISTERS

Register

Default

S14

Unidentified

S21

Unidentified

S22

Unidentified

S23

Unidentified

S27

Unidentified

BREAK SEND

Type:

Configuration

Format:

AT [cmds] \Bn [cmds]

Default:

3

Range:

1-9

Unit:

.1 second

Description:

Sends break to modem

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 data compression

Command

Function

%C0

Data compression disabled

%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

CONVERT TO RELIABLE MODE

Type:

Immediate

Format:

AT [cmds] \Y [cmds]

Description:

Converts to reliable mode from normal or direct mode

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 result codes enabled

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] \Gn [cmds]

Description:

Selects modem port flow control

Command

Function

í \G0

Flow control disabled

\G1

Flow control 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. \T0 will disable timer.

INITIATE RELIABLE MODE

Type:

Immediate

Format:

AT [cmds] \O [cmds]

Description:

Initiates reliable mode from normal or direct mode

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] \Jn [cmds]

Description:

Sets operation of serial port speed

Command

Function

\J0

Serial speed locked

í \J1

Serial speed follows connect speed

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

AT [cmds] \An [cmds]

Description:

Sets the maximum transmittable block size

Command

Function

\A0

MNP block size is 64 characters

\A1

MNP block size is 128 characters

\A2

MNP block size is 192 characters

í \A3

MNP block size is 256 characters

MNP - STREAM/BLOCK MODE

Type:

Configuration

Format:

AT [cmds] \Ln [cmds]

Description:

Selects the transfer mode for MNP link

Command

Function

í \L0

Stream mode for MNP enabled

\L1

Block mode for MNP enabled

PULSE DIALING RATIO

Type:

Configuration

Format:

AT [cmds] &Pn [cmds]

Description:

Selects pulse dial make/break ratio

Command

Function

í &P0

39/61ms at 10pps (North America)

&P1

34/66ms at 10pps (British)

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

STORE TELEPHONE NUMBER

Type:

Configuration

Format:

AT [cmds] &Zn=(phone # & modifiers)

Description:

Writes selected telephone numbers into the non-volatile memory at location n

Note:

The characters described in the D command are valid for use in the &Z command; telephone numbers and modifiers can include up to 30 characters.

SWITCH TO NORMAL MODE

Type:

Immediate

Format:

AT [cmds] \Z [cmds]

Description:

Switches to normal mode from MNP mode

TEST MODES

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Default:

0

Range:

0-125

Unit:

Bit-mapped

Description:

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

Bit

Value

Function

0

í 0

1

Local analog loopback not in progress

Local analog loopback in progress

1

í 0

Not used

2

í 0

1

Local digital loopback not in progress

Local digital loopback in progress

3

í 0

1

Modem not in remote digital loopback

Remote digital loopback in progress

4

í 0

1

Remote digital loopback not requested

Remote digital loopback requested

5

í 0

1

Remote digital loopback w/ self-test not in progress

Remote digital loopback w/ self-test in progress

6

í 0

1

Local analog loopback w/ self-test not in progress

Local analog loopback w/ self-test in progress

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] \Xn [cmds]

Description:

Selects whether XON/XOFF signals are sent to remote modem

Command

Function

í \X0

XON/XOFF signals trapped by local modem

\X1

XON/XOFF passed through local modem