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Card Type

Fax, Modem (asynchronous)

Chip Set

Unidentified

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

8-bit ISA

Fax Class

Class I & II

Data Modulation Protocol

Rockwell V.FC

Fax Modulation Protocol

ITU-T V.17, V.21CH2, V.27ter, V.29

Error Correction/Compression

MNP5, V.42, V.42bis

CONNECTIONS

Function

Label

Function

Label

Line in

CN1

Line out

CN2

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í DTR normal

SW1/1

Off

Modem ignores DTR

SW1/1

On

í Verbose result codes

SW1/2

Off

Numeric result codes

SW1/2

On

í Result code display enabled

SW1/3

On

Result code display disabled

SW1/3

Off

í Local echo enabled

SW1/4

Off

Local echo disabled

SW1/4

On

í Auto answer disabled

SW1/5

On

Auto answer enabled

SW1/5

Off

í CD signal normal

SW1/6

Off

CD forced high

SW1/6

On

í Load Y or Y1 configuration from NVRAM

SW1/7

Off

Load &F0 generic template configuration from ROM

SW1/7

On

í Smart mode

SW1/8

On

Dumb mode

SW1/8

Off

SERIAL PORT ADDRESS

Setting

JP1/A

JP1/B

JP1/C

JP1/D

COM1 (3F8h)

On

Off

Off

Off

í COM2 (2F8h)

Off

On

Off

Off

COM3 (3E8h)

Off

Off

On

Off

COM4 (2E8h)

Off

Off

Off

On

INTERRUPT

Setting

JP2/A

JP2/B

JP2/C

JP2/D

JP2/E

2

On

Off

Off

Off

Off

í 3

Off

On

Off

Off

Off

4

Off

Off

On

Off

Off

5

Off

Off

Off

On

Off

7

Off

Off

Off

Off

On

SUPPORTED COMMAND SET

Basic AT Commands

AT, �+++�, A/

A, B, E, H, L, M, P, S, T, V

&G, &T

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12

Note: See MHI Help file for full command documentation.

ABORT

Type:

Immediate

Format:

Any key

Description:

Aborts answering/originating a call; modem hangs up.

BIT-MAPPED REGISTER S13

Format

AT [cmds] S13=n [cmds]

Default:

0

Range:

0-89

Unit:

Bit-mapped

Description:

Controls DTR reset, DTR dialing, reset dialing, and MNP3.

Bit

Value

Function

0

í 0

1

Reset on low DTR

1, 2

í 00

Not used

3

í 0

1

DTR dialing enabled, dials number at position 0 in NVRAM.

4

í 0

1

Reset dialing enabled, dials number at position 0 in NVRAM.

5

í 0

Not used

6

í 0

1

MNP 3 disabled

BIT-MAPPED REGISTER S15

Format

AT [cmds] S15=n [cmds]

Default:

0

Range:

0-56

Unit:

Bit-mapped

Description:

Controls non-error-correcting mode buffer, MNP4, and BS/DEL switch.

Bit

Value

Function

0 - 2

í 0

Not used

3

í 0

1

Non-error-correcting mode transmit buffer set to 128 bytes

4

í 0

1

MNP 4 disabled

5

í 0

1

Use backspace key for delete enabled

BIT-MAPPED REGISTER S27

Format

AT [cmds] S27=n [cmds]

Default:

0

Range:

0-191

Unit:

Bit-mapped

Description:

Controls V.21, V.32 encoding and modulation, V.42 answer tone and handshake, and 9600 result codes.

Bit

Value

Function

0

í 0

1

V.21 enabled

1

í 0

1

V.32 non-trellis coding enabled

2

í 0

1

V.32 modulation disabled

3

í 0

1

2100Hz answer tone disabled

5, 4

í 00

01

10

11

LAPM enabled

6

í 0

Not used

7

í 0

1

Force 9600 result codes

BIT-MAPPED REGISTER S56

Format:

AT [cmds] S56=n [cmds]

Default:

0

Range:

0-255

Unit:

Bit-mapped

Description:

Controls non-linear coding, TX level deviation, pre-emphasis, pre-coding, shaping, V.34, and V.FC

Bit

Value

Function

0

í 0

1

Non linear coding disabled

1

í 0

1

TX level deviation disabled

2

í 0

1

Pre-emphasis disabled

3

í 0

1

Pre-coding disabled

4

í 0

1

Shaping disabled

5

í 0

Not used

6

í 0

1

V.34 disabled

7

í 0

1

V.FC disabled

BAUD RATE

Type:

Register

Format:

AT [cmds] S54=n [cmds]

Default:

0

Range:

0-255

Unit:

Bit-mapped

Description:

Controls baud rate

Bit

Value

Function

0

í 0

1

2400 baud rate disabled

1

í 0

1

2743 baud rate disabled

2

í 0

1

2800 baud rate disabled

3

í 0

1

3000 baud rate disabled

4

í 0

1

3200 baud rate disabled

5

í 0

1

3429 baud rate disabled

6

í 0

1

Call indicate during V.34 operation disabled

7

í 0

1

V.8 during V.34 operation disabled

BREAK LENGTH

Type:

Register

Format:

AT [cmds] S21=n [cmds]

Default:

10

Range:

Unidentified

Unit:

.01 second

Description:

Sets the length of error control mode breaks sent from DCE to DTE.

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] &Yn [cmds]

Description:

Configures action of break signal

Command

Function

&Y0

Empty buffer only

í &Y1

Empties buffer and break is sent immediately

&Y2

Do not empty buffer and break is sent immediately

CARRIER DETECT (CD)

Type:

Configuration

Format:

AT [cmds] &Cn [cmds]

Description:

Controls the CD signal

Command

Function

&C0

Modem does not respond to CD signal

í &C1

CD signal normal

COMPRESSION

Type:

Configuration

Format:

AT [cmds] &Kn [cmds]

Description:

Selects data compression

Command

Function

&K0

Data compression disabled

í &K1

Auto enabled/disable data compression

&K2

Data compression enabled

&K3

MNP5 data compression disabled

COMPRESSION AND ERROR CORRECTION

Format

AT [cmds] S51=n [cmds]

Default:

0

Range:

0-7

Unit:

Bit-mapped

Description:

Selects compression and error correction for specific modulations

Bit

Value

Function

0

í 0

1

MNP/V.42 disabled during V.22 operation

1

í 0

1

MNP/V.42 disabled during V.22bis operation

2

í 0

1

MNP/V.42 disabled during V.32bis operation

CONNECTION SPEED LOWER LIMIT

Type:

Configuration

Format:

AT [cmds] &Un [cmds]

Description:

Sets minimum required connection speed

Command

Function

í &U0

Disabled

&U1

300bps

&U2

1200bps

&U3

2400bps

&U4

4800bps

&U5

7200bps

&U6

9600bps

&U7

12Kbps

&U8

14.4Kbps

&U9

16.8Kbps

&U10

19.2Kbps

&U11

21.6Kbps

&U12

24Kbps

&U13

26.4Kbps

&U14

28.8Kbps

CONNECTION SPEED UPPER LIMIT

Type:

Configuration

Format:

AT [cmds] &Nn [cmds]

Description:

Sets maximum required connection speed, modem will hang up if it cannot connect.

Command

Function

í &N0

Variable

&N1

300bps

&N2

1200bps

&N3

2400bps

&N4

4800bps

&N5

7200bps

&N6

9600bps

&N7

12Kbps

&N8

14.4Kbps

&N9

16.8Kbps

&N10

19.2Kbps

&N11

21.6Kbps

&N12

24Kbps

&N13

26.4Kbps

&N14

28.8Kbps

DATA SET READY (DSR)

Type:

Configuration

Format:

AT [cmds] &Sn [cmds]

Description:

Selects DSR options

Command

Function

í &S0

DSR forced high

&S1

DSR controlled by modem

DATA TERMINAL READY (DTR)

Type:

Configuration

Format:

AT [cmds] &Dn [cmds]

Description:

Selects modem response to DTR

Command

Function

&D0

Modem does not respond to DTR

&D1

Modem goes to command mode after DTR toggles

í &D2

Modem uses DTR as normal

DIAL

Type:

Immediate

Format:

AT [cmds] D<#> [cmds]

Example:

ATDT 443-3388,,,1111;

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

í P

Pulse dialing enabled

T

Tone dialing enabled

,

Dialing paused for amount of time specified by S8 (or 2 seconds)

;

Modem returned to command state after dialing. Can only be placed at the end of the dial command.

!

Flash function initiated

/

Pause for 125ms then proceed with dial string

@

Dial, wait for quiet answer, then continue to execute the rest of the dial string

W

Dial, wait for second dial tone for amount of time specified by S6, then continue to execute the rest of the dial string

R

Answer mode enabled, originate mode disabled following handshake initiation

DIAL - LAST NUMBER

Type:

Immediate

Format:

AT [cmds] DL [cmds]

Description:

Re-dial last number dialed

DIAL - STORED NUMBER

Type:

Immediate

Format:

AT [cmds] DSn [cmds]

Description:

Dial stored number from memory location n

DISCONNECT BUFFER DELAY

Type:

Register

Format

AT [cmds] S38=n [cmds]

Default:

0

Range:

Unidentified

Unit:

1 second

Description:

Sets maximum duration allowed during buffered data calls to perform clearing functions after losing carrier-signal or receiving a clear call signal from the remote modem and before initiating hang-up process. A value of 0 will allow the modem to hanging-up after DTR drops.

DTR CHANGE THRESHOLD

Type:

Register

Format

AT [cmds] S25=n [cmds]

Default:

5

Range:

Unidentified

Unit:

.01 second

Description:

Sets maximum time a change in the DTR signal will be ignored

ERROR CORRECTION MODE (ARQ)

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Description:

Selects active error correction protocols

Command

Function

&M0

Normal mode only

í &M4

Auto-detect mode

&M5

ARQ mode only

ESCAPE CHARACTER RESPONSE

Type:

Register

Format:

AT [cmds] S14=n [cmds]

Description:

Controls reaction to escape character

Command

Function

í S14=0

Normal operation

S14=1

When +++ is received, modem goes on hook, enters command state and sends NO CARRIER result code.

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] &An [cmds]

Description:

Selects extended result codes

Command

Function

&A0

Extended result codes disabled

&A1

ARQ result codes enabled

&A2

ARQ result codes enabled and V.32 result code added

í &A3

Error control and compression result codes enabled

FACTORY DEFAULT PROFILE

Type:

Configuration

Format:

AT [cmds] &Fn [cmds]

Description:

Resets values in active profile to values found in the default profile, which are READ-ONLY.

Command

Function

&F0

Generic template

í &F1

Hardware flow control template

&F2

Software flow control template

FLOW CONTROL CHARACTER - XOFF

Type:

Register

Format:

AT [cmds] S23=n [cmds]

Default:

19

Range:

0-127

Unit:

ASCII

Description:

Sets the character used to represent XOFF.

FLOW CONTROL CHARACTER - XON

Type:

Register

Format:

AT [cmds] S22=n [cmds]

Default:

17

Range:

0-127

Unit:

ASCII

Description:

Sets the character used to represent XON.

FLOW CONTROL PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] &In [cmds]

Description:

Allows modem to act on, then transmit XON/XOFF characters.

Command

Function

í &I0

Software flow control disabled

&I1

XON/XOFF passthrough enabled

&I2

XON/XOFF passthrough disabled

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] &Hn [cmds]

Description:

Sets type of flow control used by modem

Command

Function

&H0

Flow control disabled

í &H1

CTS/RTS flow control enabled

&H2

XON/XOFF flow control enabled

&H3

CTS/RTS and XON/XOFF flow control enabled

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] &Rn [cmds]

Description:

Controls receive data hardware flow control and RTS signals

Command

Function

&R1

Modem ignores RTS

í &R2

Received data to DTE when RTS is on

HANDSHAKE TIMER

Type:

Register

Format:

AT [cmds] S28=n [cmds]

Default:

8

Range:

0-255

Unit:

.1 second

Description:

Sets the length of handshake time, so modems with V.32bis are given a chance to connect at 9600bps or higher.

INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] S19=n [cmds]

Default:

0

Range:

Unidentified

Unit:

1 minute

Description:

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

LIST AMPERSAND COMMANDS

Type:

Immediate

Format:

AT [cmds] &$ [cmds]

Description:

Displays ampersand (&) commands

LIST DIAL COMMANDS

Type:

Immediate

Format:

AT [cmds] D$ [cmds]

Description:

Displays dial commands

LIST S-REGISTERS

Type:

Immediate

Format:

AT [cmds] S$ [cmds]

Description:

Displays the S-registers

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] &Bn [cmds]

Description:

Sets operation of serial port speed

Command

Function

&B0

Serial speed follows connect speed

í &B1

Serial speed locked

&B2

Serial speed locked in ARQ mode only

MAPPING

Format:

AT [cmds] S55=n [cmds]

Default:

0

Range:

0-15

Unit:

Bit-mapped

Description:

Controls all Map options

Bit

Value

Function

0

í 0

1

8S-2D map disabled

1

í 0

1

16S-4D map disabled

2

í 0

1

32S-2D map disabled

3

í 0

1

64S-4D map disabled

ON-LINE

Type:

Immediate

Format:

AT [cmds] On [cmds]

Description:

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

Command

Function

O0

On-line command mode with no retraining enabled

O1

On-line command mode with retraining enabled

ON-LINE HELP

Type:

Immediate

Format:

AT [cmds] $ [cmds]

Description:

On-line help; displays basic command list

POWER-UP/HARD RESET CONFIGURATIONS

Type:

Configuration

Format:

AT [cmds] Yn [cmds]

Description:

On power-up modem uses default profiles

Command

Function

í Y0

Use default setting 0 saved in non-volatile RAM

Y1

Use default setting 1 saved in non-volatile RAM

PULSE DIALING RATIO

Type:

Configuration

Format:

AT [cmds] &Pn [cmds]

Description:

Selects pulse dial make/break ratio

Command

Function

í &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 4-digit product code

I1

Reports ROM checksum

I2

Reports RAM checksum

I3

Reports product type

I4

Reports current command settings

I5

Reports NVRAM settings

I6

Reports link diagnostics

I7

Reports product configuration

RESULT CODES

Type:

Configuration

Format:

AT [cmds] Qn [cmds]

Description:

Enables modem to send result codes to the DTE

Command

Function

í Q0

Result code sending enabled

Q1

Result code sending disabled

Q2

Result code sending enabled while in originate mode

SELECT CALL PROGRESS RESULT CODES

Type:

Configuration

Format:

AT [cmds] Xn [cmds]

Description:

Enables selection of tone detection and associated result code format options

Command

Function

X0

Busy and dial tone detection disabled; result codes 0-4 enabled.

X1

Busy and dial tone detection disabled; result codes 0-5, 10-107 enabled

X2

Busy tone detection disabled, dial tone detection enabled; result codes 0-6, 10-107 enabled; also adaptive dialing, wait for second dial tone, and fast dialing enabled.

X3

Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-107 enabled; also adaptive dialing, and wait for answer enabled.

í X4

Busy and dial tone detection enabled; result codes 0-1 3-25 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled.

Note: Valid numeric result codes; 0-8, 10, 13, 18, 20, 21, 25, 43, 85, 91, 99, 103, and 107.

SOFT RESET

Type:

Immediate

Format:

AT [cmds] Zn [cmds]

Description:

Restores modem profiles previously saved in non-volatile RAM

Command

Function

í Z0

Restore setting used by ATY command

Z1

Restore setting 0

Z2

Restore setting 1

Z3

Restore factory setting 0 (AT&F0)

Z4

Restore factory setting 1 (AT&F1)

Z5

Restore factory setting 2 (AT&F2)

STATUS-REGISTER

Type:

Configuration

Format:

Write: AT [cmds] Sn=x [cmds]

Description:

Writes to or reads from a specified register

Command

Function

Sn.b=x

Write to register bit b using values 0 (off) and 1 (on) for x

STORE ACTIVE PROFILE

Type:

Configuration

Format:

AT [cmds] &Wn [cmds]

Description:

Writes the values for the active profile into the non-volatile RAM templates

Command

Function

&W0

Write the active profile to stored profile 0

&W1

Write the active profile to stored profile 1

STORE TELEPHONE NUMBER

Type:

Configuration

Format:

AT [cmds] &Zn=x [cmds]

Description:

Writes selected telephone numbers into the non-volatile memory at location n

Command

Function

&Zn=L

Writes last executed dial string into the non-volatile memory at location n

&Zn?

Displays phone number from non-volatile memory at location n

&ZL?

Displays last executed dial string

TEST TIMER

Type:

Register

Format

AT [cmds] S18=n [cmds]

Default:

0

Range:

Unidentified

Unit:

1 second

Description:

Sets the maximum duration for modem tests

TONE DIALING TEST

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Description:

Selects the tone dialing test

Command

Function

í S16=0

Tone dialing test disabled

S16=2

Tone dialing test enabled

V.32 AND V.32bis MODULATIONS

Format

AT [cmds] S34=n [cmds]

Default:

0

Range:

0-9

Unit:

Bit-mapped

Description:

Controls V.32 and V.32bis modulations.

Bit

Value

Function

0

1

V.32bis disabled

2, 1

00

Not used

3

1

V.23 modulation enabled