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PC144HC

PRACTICAL PERIPHERALS, INC.

PC144HC

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

14.4Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

8-bit ISA

Fax Class

Class I & II

Data Modulation Protocol

Bell 103A/212A

ITU-T V.21, V.22, V.22bis, V.23, 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 out

CN1

Line in

CN2

BASE I/O ADDRESS SELECTION

Address

SW1/1

SW1/2

COM1: (3F8h)

On

On

COM2: (2F8h)

On

Off

COM3: (3E8h)

Off

On

COM4: (2E8h)

Off

Off

INTERRUPT SELECTION

IRQ

JP1 pins 1 & 2

JP1 pins 3 & 4

JP1 pins 5 & 6

3/4

Closed

Open

Open

2

Open

Closed

Open

5

Open

Open

Closed

Proprietary AT Command Set

EXTENDED RING

Format:

AT [cmds] S101=n [cmds]

Example:

ATS101=40<CR>

Default:

0

Range:

0 - 255

Unit:

Bit-mapped

Description:

Selects the response to extended ring types.

Bit

Value

Function

0

0

1

Do not respond to ring type A.

Respond to ring type A.

1

0

1

Do not respond to ring type B.

Respond to ring type B.

2

0

1

Do not respond to ring type C.

Respond to ring type C.

3

0

1

Do not respond to ring type D.

Respond to ring type D.

4

0

1

Do not respond to ring type E.

Respond to ring type E.

5

0

1

Do not respond to ring type F.

Respond to ring type F.

6

0

1

Do not respond to ring type G.

Respond to ring type G.

7

0

1

Report RING for all ring types.

Report RING n where n is the ring type.

HELP SCREENS

Type:

Immediate

Format:

AT [cmds] $H

Example:

AT $H<CR>

Description:

Shows modem help screens.

LAP-M PACKET SIZE

Type:

Immediate

Format:

AT [cmds] S136=n [cmds]

Example:

AT S136=2 %C1<CR>

Description:

Sets the frame size for an LAP-M connection.

Command

Function

S136=0

Select 128 byte frame size.

S136=1

Select 256 byte frame size.

S136=2

Select 512 byte frame size.

REDIAL

Type:

Immediate

Format:

AT [cmds] DL

Example:

AT M1 DL<CR>

Description:

Redials the last number dialed.

V.22 PROBE REJECT TIME

Type:

Register

Format:

AT [cmds] S97=n [cmds]

Example:

ATS97=15<CR>

Default:

30

Range:

15-70

Unit:

.1 second

Description:

Sets the time for which the modem will reject the V.22/V.22bis probe signal when in V.32 mode.