PRACTICAL PERIPHERALS, INC.

PC144MT II/MC144MT II

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

14.4Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

External

Fax Class

Class I & II

Data Modulation Protocol

Bell 103A/212A

ITU-T V.21, V.22, V.22bis, V.32, V.32bis

Fax Modulation Protocol

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

Error Correction/Compression

MNP5, V.42, V.42bis

CONNECTIONS

Purpose

Location

Purpose

Location

Line in

CN1

RS-232/422

CN4

Line out

CN2

Power switch

SW1

DC Power

CN3

   

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

AA

Red

On

Auto-answer enabled

AA

Red

Off

Auto-answer disabled

AA

Red

Blinking

Line is ringing

RX

Red

On

Modem is receiving data

RX

Red

Off

Modem is not receiving data

TX

Red

On

Modem is transmitting data

TX

Red

Off

Modem is not transmitting data

CD

Red

On

Carrier signal detected

CD

Red

Off

Carrier signal not detected

CD

Red

Blinking

Modem is retraining

OH

Red

On

Modem is off-hook

OH

Red

Off

Modem is on-hook

HS

Red

On

Modem connected at 4800bps or faster

HS

Red

Off

Modem connected at less than 4800bps

TR

Red

On

DTR signal is high

TR

Red

Off

DTR signal is low

MR

Red

On

Power on

MR

Red

Off

Power off

Proprietary Command Set

COMMAND SET DISABLE

Type:

Configuration

Format:

AT [cmds] %DUMBn [cmds]

Example:

AT %DUMB0 &W<CR>

Description:

Stops modem from responding to commands.

Command

Function

» %DUMB0

Command set enabled.

%DUMB1

Command set disabled.

REDIAL

Type:

Immediate

Format:

AT [cmds] DL

Example:

AT M0 DL<CR>

Description:

Redials the last number called.

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Example:

AT IO<CR>

Description:

Commands modem to display information requested.

Command

Function

I0

Reports modem model and speed.

I1

Reports checksum number.

I2

Reports checksum result.

I3

Reports firmware version.

I4

Reports current command settings.