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Card Type

Modem/Fax card

Chip Set

Unidentified

Maximum Modem Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Modulation Protocol

ITU-T V.22bis, V.22, V.23, V.32, V.32terbo, V.32bis, V.34

Fax Modulation Protocol

ITU-T V.27ter, V.29, V.21

Error Correction/Compression

MNP5, V.42bis

Fax Class

Class I

Data Bus

PCMCIA

SUPPORTED COMMAND SET

Basic AT Commands

AT, +++, A/

A, E, H, M, P, Q, T, V, W, X, Y, Z

&C, &F, &G, &T, &V, &W, &Y, &Z

Extended AT Commands

\A, \B, \C, \G, \J, \K, \V, \X

%A, %G

"O, "H

-J

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18, S21, S22, S23, S25

S26, S27, S30, S37, S40, S46

Note: See MHI Help File for full command documentation.

AUTO-MODE DETECTION

Type:

Configuration

Format:

AT [cmds] Nn [cmds]

Description:

Selects various options for the automatic detection and negotiation of protocols during the handshake process if the modem is communicating with a remote modem of dissimilar speed.

Command

Function

N0

Auto-mode detection disabled

í N1

Auto-mode detection enabled

COMMUNICATIONS MODE

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Description:

Selects communications mode

Command

Mode

&M0

Asynchronous mode

&M4

Hayes auto-synchronous mode

COMMUNICATIONS MODE

Type:

Configuration

Format:

AT [cmds] &Qn [cmds]

Description:

Selects communications mode options

Command

Mode

&Q0

Asynchronous mode, serial port speed follows connect speed.

&Q4

Auto-synchronous mode

COMMUNICATION PROTOCOLS

Type:

Configuration

Format:

AT [cmds] Bn [cmds]

Description:

Selects the communication protocol for data calls

Command

Protocol

B0

CCITT mode

í B1

Bell mode

B2

ITU-T V.23 originate mode; 75bps transmit, 1200bps receive

B3

ITU-T V.23 originate mode; 1200bps transmit, 75bps receive

DATA SET READY (DSR)

Type:

Configuration

Format:

AT [cmds] &Sn [cmds]

Description:

Selects DSR options

Command

Function

&S0

DSR forced high

&S1

DSR high only while modem is handshaking or connected

DATA TERMINAL READY (DTR)

Type:

Configuration

Format:

AT [cmds] &Dn [cmds]

Description:

Selects modem response to DTR

Command

Function

&D0

DTR override

&D1

DTR toggle causes online command mode

í &D2

Normal DTR operations

&D3

Resets on receipt of DTR

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.

Command

Function

DP

Pulse dialing enabled

DR

Answer mode enabled; originate mode disabled following handshake initiation.

DS=n

Dial stored telephone number n

DT

Tone dialing enabled/Pulse dialing disabled

DW

Dialing resumed following dial tone detection

D,

Dialing paused for amount of time specified in S8 register

D!

Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.

D@

Wait for Quite Answer function enabled. Modem waits until a "quiet answer," a ring-back signal followed by 5 seconds of silence

D;

Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] &Kn [cmds]

Description:

Enables flow control options

Command

Function

&K0

Flow control disabled

&K3

RTS/CTS flow control enabled

&K4

XON/XOFF flow control enabled

LINE TYPE

Type:

Configuration

Format:

AT [cmds] &Ln [cmds]

Description:

Selects line type

Command

Line Type

&L0

Switched line (PSTN/Dial-up)

ON-LINE

Type:

Immediate

Format:

AT [cmds] On [cmds]

Description:

Controls on-line command (data transmission) state options.

Command

Function

O0

On-line command mode with no retraining enabled

O1

On-line command mode with retraining enabled

O3-O13

On-line command mode with new user defined rate as specified by register S62

PULSE DIALING RATIO

Type:

Configuration

Format:

AT [cmds] &Pn [cmds]

Description:

Selects pulse dial make/break ratio

Command

Function

&P0

39/61ms at 10pps (North America)

&P1

33/67ms at 10pps (Europe)

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested

Command

Function

I0

Reports four digit product code

I1

Reports ROM checksum

I2

Reports internal memory test

I3

Reports firmware ID

I4

Reserved

RTS/CTS

Type:

Configuration

Format:

AT [cmds] &Rn [cmds]

Description:

Selects RTS/CTS options

Command

Function

&R0

Reserved

&R1

CTS forced high, RTS is ignored.

SPEAKER VOLUME

Type:

Configuration

Format:

AT [cmds] Ln [cmds]

Description:

Controls speaker volume

Command

Function

L0

Low volume setting

L1

Low volume setting

í L2

Medium volume setting

L3

Highest volume setting

V.32 - AUTO-RETRAIN

Type:

Configuration

Format:

AT [cmds] &Bn [cmds]

Description:

Controls auto-retrain function if poor line quality is detected

Command

Function

&B0

Auto-retrain disabled modem hangs-up

í &B1

Auto-retrain enabled if line quality is poor. Hang-up after reaching threshold set in register S7

&B2

Tolerate any line quality

COMPRESSION

Type:

Configuration

Format:

AT [cmds] %Cn [cmds]

Description:

Selects data compression

Command

Function

%C0

Data compression disabled

%C1

MNP5 enabled

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Description:

Controls the type of connection the modem will operate in

Command

Function

\N0

Normal mode enabled

\N1

Direct mode enabled

\N2

Reliable mode enabled

í \N3

Auto-reliable mode enabled

\N4

V.42 reliable mode enabled

FIRMWARE

Type:

Configuration

Format:

AT [cmds] -Vn [cmds]

Description:

Display modem firmware virsion

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] \Qn [cmds]

Description:

Sets type of flow control used by modem

Command

Function

\Q0

Flow control disabled

\Q1

Bi-directional XON/XOFF flow control enabled

\Q2

CTS flow control by DCE enabled

í \Q3

Bi-directional RTS/CTS flow control enabled

INACTIVITY TIMER

Type:

Configuration

Format:

AT [cmds] \Tn [cmds]

Range:

0-90

Unit:

1 second

Description:

Sets the length of time that the modem does not receive information before it disconnects.

V.42bis - DICTIONARY SIZE

Type:

Configuration

Format:

AT [cmds] "Nn [cmds]

Description:

Select V.42 dictionary size

Command

Function

"N0

Select 512 bytes

"N1

Select 1024 bytes

í "N2

Select 1536 bytes

AUTOMATIC FALLBACK

Type:

Register

Format

AT [cmds] S43=n [cmds]

Range:

0-127

Unit:

ASCII

Description:

Sets automatic fallback character. Default=13

AUTORELIABLE BUFFER

Type:

Register

Format

AT [cmds] S48=n [cmds]

Range:

0-2

Unit:

Unidentified

Description:

Controls autoreliable buffer

BIT-MAPPED REGISTER S19

Format

AT [cmds] S19=n [cmds]

Unit:

Bit-mapped

Description:

Controls autosync options. Default=26

BIT-MAPPED REGISTER S20

Format

AT [cmds] S20=n [cmds]

Range:

0-255

Unit:

Bit-mapped

Description:

Controls autosync HDLC address. Default=255

BIT-MAPPED REGISTER S44

Format

AT [cmds] S44=n [cmds]

Unit:

Bit-mapped

Description:

Determines V.42bis status and automatic fall forward/fallback. Default=7

BIT-MAPPED REGISTER S51

Format

AT [cmds] S51=n [cmds]

Unit:

Bit-mapped

Description:

Determines flow control options. Default=3

BIT-MAPPED REGISTER S54

Format

AT [cmds] S54=n [cmds]

Unit:

Bit-mapped

Description:

Determines V.23, error correction result code

BREAK OPTION

Type:

Register

Format

AT [cmds] S52=n [cmds]

Range:

0-5

Unit:

Unidentified

Description:

Controls break options. Default=5

BTLZ OPTIONS

Type:

Register

Format

AT [cmds] S58=n [cmds]

Range:

6-64

Unit:

Bytes

Description:

Sets BTLZ string length. Default=32

CONNECT MESSAGE

Type:

Register

Format

AT [cmds] S41=n [cmds]

Range:

0-2

Unit:

Unidentified

Description:

Determines connect message. Default=0

DTE RATE SELECTION

Type:

Register

Format

AT [cmds] S72=n [cmds]

Range:

0-18

Unit:

Unidentified

Description:

Selects DTE rate

DTE RATE STATUS

Type:

Register

Format

AT [cmds] S62=n [cmds]

Range:

0-17

Unit:

Unidentified

Description:

Determines DTE rate status. Default=16

MNP5 ERROR CORRECTION

Type:

Register

Format

AT [cmds] S59=n [cmds]

Range:

0-1

Unit:

Unidentified

Description:

Sets MNP5 error correction

POWER-UP PROFILE

Type:

Register

Format

AT [cmds] S98=n [cmds]

Range:

0, 1

Unit:

Unidentified

Description:

Sets power-up profile

ROUND TRIP DELAY

Type:

Register

Format

AT [cmds] S65=n [cmds]

Range:

Unidentified

Unit:

.1second

Description:

Sets round trip time delay. Default=100

SLEEP TIMER/PCMCIA

Type:

Register

Format

AT [cmds] S47=n [cmds]

Range:

0-255

Unit:

Unidentified

Description:

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

V.32 RETRAIN

Type:

Register

Format

AT [cmds] S42=n [cmds]

Range:

0-2

Unit:

Unidentified

Description:

Controls V.32 retrain. Default=1

V.42bis DICTIONARY SIZE

Type:

Register

Format

AT [cmds] S57=n [cmds]

Range:

0-2

Unit:

Unidentified

Description:

Sets the maximum V.42bis dictionary size. Default=2

V.42 MAXIMUM BLOCK SIZE

Type:

Register

Format

AT [cmds] S49=n [cmds]

Range:

63, 127, 191, 255

Unit:

Unidentified

Description:

Sets the maximum block size in V.42 mode. Default=255

V.42/MNP/NORMAL MODES

Type:

Register

Format

AT [cmds] S53=n [cmds]

Range:

0-4

Unit:

Unidentified

Description:

Controls V.42/MNP/Normal modes. Default=3