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2400BPS MODEM (0302AMC)

UNIDENTIFIED

2400BPS MODEM (0302AMC)

Card Type

Modem (asynchronous)

Chip Set

Unidentified

Maximum Data Rate

2400bps

Data Bus

8-bit ISA

Data Modulation Protocol

Bell 103A/212A

ITU-T V.22, V.22bis

Error Correction/Compression

MNP5, V.42, V.42bis

CONNECTIONS

Function

Label

Function

Label

Line out

CN1

Line in

CN2

SERIAL PORT ADDRESS

Setting

JP1/A

JP1/B

JP1/C

JP1/D

COM1 (3F8h)

Closed

Open

Closed

Open

COM2 (2F8h)

Closed

Open

Open

Closed

COM3 (3E8h)

Open

Closed

Closed

Open

COM4 (2E8h)

Open

Closed

Open

Closed

INTERRUPT

Setting

JP1/E

JP1/F

JP1/G

JP1/H

2

Open

Open

Open

Closed

3

Open

Closed

Open

Open

4

Closed

Open

Open

Open

5

Open

Open

Closed

Open

WAIT STATE

Setting

JP1/I

JP1/J

0

Closed

Open

1

Open

Closed

Proprietary AT Command Set

BIT MAPPED REGISTERS

Register

Default

S14

170

S21

0

S22

118

S23

7

S27

64

S28

0

DTMF ATTENUATION

Type:

Configuration

Format:

AT [cmds] %Dn [cmds]

Default:

0

Range:

1-7

Unit:

2 dBm

Description:

Controls DTMF attenuation

SECONDARY DEFAULTS

Type:

Immediate

Format:

AT [cmds] %J [cmds]

Description:

Sets all S registers and AT commands to AT&F default except; S6=3s, range 3-255; S11=95ms, range 60-255; %L3, 6dBm; %D1, 2dBm.

TEST MODES

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 in progress

Remote digital loopback in progress

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

TRANSMIT ATTENUATION

Type:

Configuration

Format:

AT [cmds] %Ln [cmds]

Default:

0

Range:

1-7

Unit:

2 dBm

Description:

Controls transmit attenuation