...because we can't all be on the bleeding edge...





PM2400SA

PRACTICAL PERIPHERALS, INC.

PM2400SA

Card Type

Fax, Modem (asynchronous)

Chip Set

Rockwell

Maximum Data Rate

2400bps

Data Bus

External

Data Modulation Protocol

Bell 103/212A

ITU-T V.22, V.22bis

V2036

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

MR

Red

On

Power is on

MR

Red

Off

Power is off

TX

Red

On

Modem is transmitting data

TX

Red

Off

Modem is not transmitting data

RX

Red

On

Modem is receiving data

RX

Red

Off

Modem is not receiving data

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

AA

Red

On

Auto-answer enabled

AA

Red

Off

Auto-answer disabled

AA

Red

Blinking

Phone is ringing

HS

Red

On

Modem is operating at 4800bps or faster

HS

Red

Off

Modem is operating at slower than 4800bps

MISCELLANEOUS TECHNICAL NOTES

Note: Diagram not available. This modem is asynchronous only, but if your software supports synchronous operation the modem will run synchronous mode.

Proprietary AT Command Set

See document V2037 for complete command summary.

BIT-MAPPED REGISTER S21

Format

AT [cmds] S21=n [cmds]

Default:

Unidentified

Range:

0-253

Unit:

Bit-mapped

Description:

Selects jack type, CTS*/DCD/DSR* signals, low DTR action, and the long space disconnect function.

Bit

Value

Function

0

í 0

1

Selects RJ-11, RJ-41S, or RJ45S jack

Selects RJ-12 or RJ-13 jack

1

í 0

Not used

2

0

1

*Software driven

*Software driven

4, 3

í 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

í 0

1

DCD forced high

DCD normal

6

0

1

*Software driven

*Software driven

7

í 0

1

Long space disconnect function disabled

Long space disconnect function enabled

BIT-MAPPED REGISTER S23

Format

AT [cmds] S23=n [cmds]

Default:

Unidentified

Range:

0-247

Unit:

Bit-mapped

Description:

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

Bit

Value

Function

0

0

1

*Software driven

*Software driven

2, 1

00

01

10

í 11

Sets serial port speed to 0-300bps

Not used

Sets serial port speed to 1200bps

Sets serial port speed to 2400bps

3

í 0

Not used

5, 4

í 00

01

10

11

Parity even

Space parity

Parity odd

Mark or no parity

7, 6

í 00

01

10

11

Guard tone disabled

Guard tone 550Hz enabled

Guard tone 1800Hz enabled

Not used

BIT-MAPPED REGISTER S27

Format

AT [cmds] S27=n [cmds]

Default:

Unidentified

Range:

0-115

Unit:

Bit-mapped

Description:

Selects synchronous*/asynchronous mode, clock source*, and ITU-T/Bell modes.

Bit

Value

Function

1, 0

í 00

01

10

11

Asynchronous mode

*Software driven

*Software driven

*Software driven

3, 2

í 00

Not used

5, 4

00

01

10

11

*Software driven

*Software driven

*Software driven

*Software driven

6

0

í 1

ITU/T mode

Bell mode

SOFTWARE DRIVEN COMMANDS

Type:

Configuration

Note:

These commands are used by software that allows the modem to operate in synchronous mode, this modem doesn’t have the hardware to support synchronous mode.

Command

Function

Unidentified

Smart/Dumb mode options

&S

Ready To Send/Clear To Send options

&R

Data Set Ready options

&X

DTE transmit clock source