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PM1200

PRACTICAL PERIPHERALS, INC.

PM1200

Card Type

Modem (asynchronous)

Chip Set

Unidentified

Maximum Data Rate

1200bps

Data Bus

8-bit ISA

Data Modulation Protocol

Bell 103/212A

ITU-T V.22

V2038

USER CONFIGURABLE SETTINGS

Setting

Label

Position

DTR is ignored

SW1/E

On

DTR normal

SW1/E

Off

DCD forced high

SW1/F

On

DCD normal

SW1/F

Off

SERIAL PORT ADDRESS

Setting

IRQ

SW1/A

SW1/B

SW1/C

SW1/D

COM1 (3F8h)

4

On

On

On

Off

íCOM2 (2F8h)

3

Off

On

Off

On

COM3 (3E8h)

4

On

Off

On

Off

COM4 (2E8h)

3

Off

Off

Off

On

MISCELLANEOUS TECHNICAL NOTES

Diagram not available

Proprietary AT Command Set

BIT-MAPPED REGISTER S13

Format:

AT [cmds] S13=n [cmds]

Default:

Unidentified

Range:

0-220

Unit:

Bit-mapped

Description:

Controls parity, data bits, and buffer overflow flag.

Bit

Value

Function

1, 0

00

Not used

2

0

1

Parity disabled

Parity enabled

3

0

1

Odd parity

Even parity

4

0

1

7 data bits

8 data bits

5

0

Not used

6

0

1

Buffer overflow flag disabled

Buffer overflow flag enabled

7

0

1

Space parity

Mark parity

BIT-MAPPED REGISTER S14

Format:

AT [cmds] S14=n [cmds]

Default:

Unidentified

Range:

0-174

Unit:

Bit-mapped

Description:

Controls echo, result codes and display, pulse dial make/break ratio, ITU-T/Bell modes, and the long space disconnect function.

Bit

Value

Function

0

í 0

Not used

1

0

í 1

Command echo disabled

Command echo enabled

2

í 0

1

Result codes enabled

Result codes disabled

3

0

í 1

Display result codes in numeric format

Display result codes in verbose format

4

í 0

Not used

5

0

í 1

33/67ms at 10pps (Europe)

39/61ms at 10pps (North America)

6

0

1

ITU/T mode

Bell mode

7

í 0

1

Long space disconnect function disabled

Long space disconnect function enabled

BIT-MAPPED REGISTER S15

Format:

AT [cmds] S15=n [cmds]

Default:

Unidentified

Range:

0-127

Unit:

Bit-mapped

Description:

Controls baud rate, answer/originate mode, and carrier signal.

Bit

Value

Function

1, 0

00

01

10

11

Unidentified

110bps

300bps

1200bps

2

0

1

Answer mode enabled

Answer mode disabled

3

0

1

Originate mode disabled

Originate mode enabled

5, 4

00

01

10

11

Unidentified

110bps

300bps

1200bps

6

0

1

Carrier signal disabled

Carrier signal 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

T

Tone dialing enabled

,

Dialing paused for amount of time specified in S8 register

/

Dialing paused for 125 millisecond

!

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

@

Wait for quiet answer

;

Modem returned to command state after dialing

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested

Command

Function

I0

Reports modem model and speed

I1

Reports firmware revision

I2

Tests and reports internal memory test

TEST MODES

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Description:

Controls loopback tests, analog, digital, and DTMF tone tests

í Command

Function

S16=0

Normal mode

í S16=1

Local analog loopback in progress

í S16=2

DTMF tone test in progress

í S16=4

Digital loopback in progress