OSITECH COMMUNICATIONS, INC.

LAPTALK PLUS 14.4K

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

14.4Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

Compaq portable bus

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.21CH2, V.27ter, V.29

Error Correction/Compression

MNP5, MNP10, V.42, V.42bis

CONNECTIONS

Purpose

Location

Purpose

Location

Line in

CN1

Compaq portable bus

CN3

Daughterboard connector for network

CN2

   

Proprietary AT Command Set

BIT-MAPPED REGISTERS

Register

Default

S14

138

S16

0

S21

4

S22

118

S23

55

S27

9

S28

0

S31

194

S39

3

S40

107

S41

03

BREAK SEND

Type:

Configuration

Format:

AT [cmds] \Bn [cmds]

Example:

AT \B3 &W<CR>

Default:

3

Range:

0-9

Unit:

.1 second

Description:

Sends break to modem.

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Example:

AT \K1 <CR>

Description:

Configures action of break signal.

Command

Break from DTE

Break from DTE while in command mode

Break from remote modem

í \K0

Enter command mode, do not send break to remote modem.

Buffers cleared and break sent to remote modem.

Buffers cleared and break sent to DTE.

í \K1

Buffers cleared and break sent to remote modem.

Buffers cleared and break sent to remote modem.

Buffers cleared and break sent to DTE.

í \K2

Enter command mode, do not send break to remote modem.

Send break to remote modem immediately.

Send break to DTE immediately.

í \K3

Send break to remote modem immediately.

Send break to remote modem immediately.

Send break to DTE immediately.

í \K4

Enter command mode, do not send break to remote modem.

Send break to remote modem with transmitted data.

Send break to remote modem with transmitted data.

» \K5

Send break with transmitted data.

Send break to remote modem with transmitted data.

Send break to remote modem with transmitted data.

COMPRESSION

Type:

Configuration

Format:

AT %Cn

Example:

AT %C1 &B0<CR>

Description:

Selects data compression.

í Command

Function

í %C0

Data compression disabled.

í %C1

MNP5 enabled.

í %C2

V.42bis enabled.

» %C3

MNP5 and V.42bis enabled.

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Example:

AT \N1 DT555-1212<CR>

Description:

Sets connect mode.

í Command

Function

í \N0

Normal mode enabled.

í \N1

Direct mode enabled.

í \N2

Reliable mode enabled.

» \N3

Auto-reliable mode enabled.

í \N4

LAPM mode enabled.

í \N5

MNP mode enabled.

FALL FORWARD/ADJUST TRANSMIT LEVEL

Type:

Configuration

Format:

AT [cmds] -Un [cmds]

Example:

AT -U1 &W<CR>

Description:

Forces a fall forward and change in transmit level during fall forward

í Command

Function

-U0

Automatic attenuation to -10dBm

-U1

Automatic attenuation down to -18dBm

-U2

Automatic attenuation down to22dBm

-U3

automatic attenuation down to -25dBm

-U4

At 2400bps, force transmit level to -10 dBm

-U5

At 2400bps, force transmit level to -18 dBm

-U6

At 2400bps, force transmit level to -22 dBm

-U7

At 2400bps, force transmit level to -25 dBm

FALLBACK

Type:

Immediate

Format:

AT [cmds] -B [cmds]

Example:

AT -B &W<CR>

Description:

Forces fallback to 1200bps at -10dBm

FLOW CONTROL CHARACTER - XOFF

Type:

Register

Format:

AT [cmds] S33=n [cmds]

Example:

ATS33=20<CR>

Default:

19

Range:

0-255

Unit:

ASCII

Description:

Sets the character used to represent XOFF.

FLOW CONTROL CHARACTER - XON

Type:

Register

Format:

AT [cmds] S32=n [cmds]

Example:

ATS32=20<CR>

Default:

17

Range:

0-255

Unit:

ASCII

Description:

Sets the character used to represent XON.

LEASED LINE TRANSMISSION LEVEL

Type:

Configuration

Format:

AT [cmds] S99=n [cmds]

Example:

AT S99=8<CR>

Default:

10

Range:

0 to 15

Unit:

-1 dBm

Description:

Sets the signal level for transmission when in leased-line mode.

LINE SIGNAL LEVEL

Type:

Immediate

Format:

AT [cmds] %L [cmds]

Example:

AT %L &W<CR>

Range:

9-43

Unit:

-1dB

Description:

Returns received line signal level.

MNP10 COMPRESSION

Type:

Configuration

Format:

AT [cmds] -Kn [cmds]

Example:

AT %C1 -K1 <CR>

Description:

Selects MNP10 data compression.

í Command

Function

í -K0

MNP10 disabled.

» -K1

MNP10 enabled.

MNP10 LINK NEGOTIATION

Type:

Configuration

Format:

AT [cmds] *Hn [cmds]

Example:

AT *H0 -Q1 <CR>

Description:

Sets the speed at which MNP10 link negotiation will occur.

í Command

Function

» *H0

Link will be negotiated at highest possible speed.

í *H1

Link will be negotiated at 1200bps.

MNP10 POWER LEVEL ADJUST

Type:

Configuration

Format:

AT [cmds] )Mn [cmds]

Example:

AT )M1 %C1<CR>

Description:

Controls automatic transmit power level adjustment during MNP 10 link negotiation.

í Command

Function

» )M0

Power level adjustment disabled.

í )M1

Power level adjustment enabled.

PROTOCOL/SPEED

Format

AT [cmds] S37=n [cmds]

Example:

ATS37=11<CR>

Default:

0

Range:

0-21

Unit:

Bit-mapped.

Description:

Selects protocol and line speed.

í Command

Function

» S37=0

Auto-select fastest common protocol.

S37=1

Connect at 300bps

S37=2

Connect at 300bps

S37=3

Connect at 300bps.

S37=4

Not used.

S37=5

Connect at 1200bps V.22.

S37=6

Connect at 2400bps.V.22bis

S37=7

Connect at 75/1200bps.V.32

S37=8

Connect at 4800bps V.32bis/V.32.

S37=9

Connect at 9600bps V.32bis/V.32

S37=10

Connect at 12Kbps V.32bis

S37=11

Connect at 14.4Kbps V.32bis

S37=12

Connect at V.32bis 7200bps

REPORT SIGNAL QUALITY

Type:

Configuration

Format:

AT [cmds] %Q [cmds]

Example:

AT %Q &W<CR>

Description:

Reports signal quality.

SLEEP TIMER

Format

AT [cmds] S24=n [cmds]

Example:

ATS24=40<CR>

Default:

1

Range:

0 - 255

Unit:

10 second

Description:

Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode.