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Card Type

Modem/Fax card

Chip Set

Texas Instruments

Maximum Modem Rate

56Kbps

Maximum Fax Rate

14.4Kbps

Data Modulation Protocol

ITU-T V.21, V.22, V.22bis, V.32, V.32bis, V.34, V.34bis, V.90, X2

Fax Modulation Protocol

ITU-T V.17, V.27ter, V.29, V.21 CH 2

Error Correction/Compression

MNP5, V.42, V.42bis

Fax Class

Class I & 2

Data Bus

16-bit ISA

CONNECTIONS

Function

Label

Function

Label

Line in (RJ-11)

CN1

Speaker jack

CN3

Line out (RJ-11)

CN2

Microphone jack

CN4

SERIAL PORT ADDRESS

Setting

JP1/A

JP1/B

JP1/C

COM1 (3F8h)

Closed

Closed

Closed

COM2 (2F8h)

Open

Closed

Closed

COM3 (3E8h)

Closed

Open

Closed

COM4 (2E8h)

Open

Open

Closed

Plug & play

Open

Open

Open

INTERRUPT

Setting

JP2/A

JP2/B

JP2/C

JP2/D

JP2/E

JP2/F

IRQ3

Closed

Open

Open

Open

Open

Open

IRQ4

Open

Closed

Open

Open

Open

Open

IRQ5

Open

Open

Closed

Open

Open

Open

IRQ9

Open

Open

Open

Closed

Open

Open

IRQ10

Open

Open

Open

Open

Closed

Open

IRQ15

Open

Open

Open

Open

Open

Closed

Plug & play

Open

Open

Open

Open

Open

Open

SUPPORTED COMMAND SET

Basic AT Commands

AT, �+++�, A/

A, E, H, M, O, V

&C, &G, &T, &W, &Z

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18

Note: See MHI Help File for full command documentation.

BREAK OPTIONS

Type:

Configuration

Format

AT [cmds] &Yn [cmds]

Description:

Sets the method for break transmission during error-control and ASB connections.

Command

Function

í &Y0

Destructive signaling, buffers cleared, does not pass break to DCE

&Y1

Expedited destructive signaling, buffers cleared, immediately send timed break

&Y2

Expedited signaling, break sent out of sequence

COMMUNICATION PROTOCOLS

Type:

Configuration

Format:

AT [cmds] Bn [cmds]

Description:

Selects the communication protocol for data calls

Command

Protocol

í B0

ITU-T V.25 answer sequence

B1

Answer tone

COMPRESSION

Type:

Configuration

Format:

AT [cmds] &Kn [cmds]

Description:

Selects data compression

Command

Function

&K0

Data compression disabled

&K1

MNP5 and V.42bis enabled if DTE rate is higher than link rate and data compression supported by remote

&K2

MNP5 and V.42bis enabled

&K3

V.42bis enabled

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Description:

Controls the type of connection the modem will operate in

Command

Function

&M0

Normal mode enabled

í &M4

Auto-reliable mode enabled

&M5

MNP reliable mode enabled

DATA SET READY (DSR)

Type:

Configuration

Format:

AT [cmds] &Sn [cmds]

Description:

Selects DSR options

Command

Function

í &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

DTR toggle causes modem to go on-hook

DCE LINE SPEED (MAXIMUM)

Type:

Configuration

Format

AT [cmds] &Nn [cmds]

Description:

Sets the maximum allowable data exchange rate attempted during handshake process.

Command

Function

&N1

Speed of last connection

&N2

300bps

&N3

1200bps

&N4

2400bps

&N5

4800bps

&N6

7200bps

&N7

9600bps

&N8

12.0Kbps

&N9

14.4Kbps

&N10

16.8Kbps

&N22

19.2Kbps

&N12

21.6Kbps

&N13

24.0Kbps

&N14

26.4Kbps

&N15

28.8Kbps

&N16

31.2Kbps

&N17

33.6Kbps

&N18

32.0Kbps (X2)

&N19

36.0Kbps (X2)

&N20

40.0Kbps (X2)

&N21

44.0Kbps (X2)

&N22

48.0Kbps (X2)

&N23

49.3Kbps (X2)

&N24

50.7Kbps (X2)

&N25

52.0Kbps (X2)

&N26

53.3Kbps (X2)

&N27

54.7Kbps (X2)

56.0Kbps (X2)

&N29

57.3Kbps (X2)

&N30

58.7Kbps (X2)

60.0Kbps (X2)

&N32

61.3Kbps (X2)

DCE LINE SPEED (MINIMUM)

Type:

Configuration

Format

AT [cmds] &Un [cmds]

Description:

Sets the minimum allowable data exchange rate attempted during handshake process.

Command

Function

&U1

No minimum

&U2

300bps

&U3

1200bps

&U4

2400bps

&U5

4800bps

&U6

7200bps

&U7

9600bps

&U8

12.0Kbps

&U9

14.4Kbps

&U10

16.8Kbps

&U22

19.2Kbps

&U12

21.6Kbps

&U13

24.0Kbps

&U14

26.4Kbps

&U15

28.8Kbps

&U16

31.2Kbps

&U17

33.6Kbps

&U18

32.0Kbps (X2)

&U19

36.0Kbps (X2)

&U20

40.0Kbps (X2)

&U21

44.0Kbps (X2)

&U22

48.0Kbps (X2)

&U23

49.3Kbps (X2)

&U24

50.7Kbps (X2)

&U25

52.0Kbps (X2)

&U26

53.3Kbps (X2)

&U27

54.7Kbps (X2)

56.0Kbps (X2)

&U29

57.3Kbps (X2)

&U30

58.7Kbps (X2)

60.0Kbps (X2)

&U32

61.3Kbps (X2)

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

DL

Re-dial last number

DP

Pulse dialing enabled

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/

Delays for 125ms before dialing

DR

Answer mode enabled; originate mode disabled following handshake initiation.

DSn

Dial stored telephone number n

D@

Wait for Quite Answer function enabled. Modem waits until a "quiet answer," a ring-back signal followed by silence up to the time specified in S7, is received prior to executing the rest of the dial string.

D$

Wait for prompt tone detection function enabled. Waits for prompt tone for amount of time specified by the S7 command.

D;

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

ERROR CORRECTION RESULT CODES

Type:

Configuration

Format:

AT [cmds] &An [cmds]

Description:

Selects error correction responses

Command

Function

&A0

ARQ result codes disabled

&A1

ARQ to word CONNECT result codes enabled when an error correction connection is made

&A2

V.32 indicator added in result codes for calls at or above 4800bps

&A3

Protocol response added: /LAPM, /MNP, or NONE and V.42bis/MNP5

FACTORY DEFAULT PROFILE

Type:

Configuration

Format:

AT [cmds] &Fn [cmds]

Description:

Sets values in active profile to values found in the default profile

Command

Function

&F0

Load standard factory configuration

&F1

Restore factory configuration 1. Hardware flow control

&F2

Restore factory configuration 2. Software flow control

Type:

Configuration

Format:

AT [cmds] &Hn [cmds]

Description:

Enables flow control options

Command

Function

&H0

Flow control disabled

&H1

RTS to CTS flow control enabled

&H2

XON/XOFF flow control enabled

&H3

RTS/CTS & XON/XOFF flow control enabled

LIST DISPLAY

Type:

Immediate

Format:

AT [cmds] &$ [cmds]

Description:

Displays a list of ampersand commands

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

In answer mode; serial speed fixed for ARQ calls, variable for non-ARQ calls

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 product code

I1

Reports ROM checksum

I2

Reports results of RAM self-test

I3

Reports product type

I4

Reports current modem settings

I5

Reports NVRAM settings

I6

Reports link diagnostics

I7

Reports product confirmation

I8

Reserved

I9

Reports plug & play information

I10

Reserved

I11

Reports call statistics

RESTORE PROFILE ON POWER-UP

Type:

Configuration

Format:

AT [cmds] Yn [cmds]

Description:

Restores a selected profile into the active profile on power-up (hard reset)

Command

Function

í Y0

Restore profile 0 on power-up

Y1

Restore profile 1 on power-up

Y2

Restore generic factory template (&F0)

Y3

Hardware flow control (&F1)

Y4

Software flow control (&F2)

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 only in originate mode

Q3

Result code sending only in ring mode

RTS

Type:

Configuration

Format:

AT [cmds] &Rn [cmds]

Description:

Selects RTS

Command

Function

&R0

RTS signal is ignored

í &R1

Data is sent to DTE only is RTS in forced high

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 - 25 enabled.

X2

Busy tone detection disabled, dial tone detection enabled; result codes 0 - 6 & 10 - 236 enabled.

X3

Busy and dial tone detection disabled; 8 - 236 enabled.

X4 - X6

Busy and dial tone detection enabled; extended result codes enabled

SOFT RESET

Type:

Immediate

Format:

AT [cmds] Zn [cmds]

Description:

Restores modem profiles previously saved in non-volatile RAM using the &W command.

Command

Function

Z0

Restore NVRAM profile selected by ATY command

Z1

Restore NVRAM profile 0

Z2

Restore NVRAM profile 1

Z3

Restore factory default profile 0 (&F0)

Z4

Restore factory default profile 1 (&F1)

Z5

Restore factory default profile 2 (&F2)

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

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] &In [cmds]

Description:

Selects whether XON/XOFF signals are sent to remote modem

Command

Function

í &I0

XON/XOFF signals trapped by local modem

&I1

XON/XOFF passed through local modem and remote

&I2

XON/XOFF passed through local modem only

ANSWER TONES, DEFAULT TIMES, AND CONNECTION LIMITING

Type:

Register

Format

AT [cmds] S28=n [cmds]

Description:

Controls answer tones, connections, and time specified

Command

Function

S28=0

Eliminates V.32 answer tones for a faster connection

S28=8

All default times are in 1sec units

S28=255

Connections disabled except V.32 9600bps

BIT-MAPPED REGISTER S27

Format:

AT [cmds] S27=n [cmds]

Range:

0-255

Description:

Select modulations and error correction flags

Bit

Value

Function

0

1

V.21/Bell 103 mode enabled

1

1

Unencoded modulation in V.32 mode enabled

2

1

V.32 modulation disabled

3

1

2100Hz answer tone enabled

4

1

V.23 fallback mode enabled

5

1

V.32bis mode disabled

6

0

Reserved

7

1

Software compatibility mode enabled

BIT-MAPPED REGISTER S32

Format:

AT [cmds] S32=n [cmds]

Range:

0-255

Description:

Select modulations and call control flags

Bit

Value

Function

0

1

V.8 call indicate enabled

1

1

V.8 mode enabled

2

1

V.FC modulation disabled

3

1

V.34 modulation disabled

4

1

V.34+ modulation disabled

5

1

X2 modulation disabled

6

1

V.90 modulation disabled

7

0

Reserved

BIT-MAPPED REGISTER S33

Format:

AT [cmds] S33=n [cmds]

Range:

0-255

Description:

Enables/disables symbol rates

Bit

Value

Function

0

1

2400 symbol rate disabled

1

1

2743 symbol rate disabled

2

1

2800 symbol rate disabled

3

1

3000 symbol rate disabled

4

1

3200 symbol rate disabled

5

1

3429 symbol rate disabled

6

0

Reserved

7

1

2400 symbol rate disabled

BIT-MAPPED REGISTER S34

Format:

AT [cmds] S34=n [cmds]

Range:

0-255

Description:

Controls trellis coding options

Bit

Value

Function

0

1

8S-2D trellis encoding disabled

1

1

16S-4D trellis encoding disabled

2

1

32S-2D trellis encoding disabled

3

1

64S-4D trellis encoding disabled

4

1

Non-linear coding disabled

5

1

TX level deviation disabled

6

1

Pre-emphasis disabled

7

1

Pre-coding disabled

BIT-MAPPED REGISTER S41

Format:

AT [cmds] S41=n [cmds]

Range:

0-255

Description:

Controls trellis coding options

Bit

Value

Function

0, 1

1000

Message waiting

7-2

0

Reserved

BREAK CHARACTER LENGTH

Type:

Register

Format

AT [cmds] S21=n [cmds]

Range:

0-255

Unit:

10ms

Description:

Sets the length of break characters sent from modem to DTE in MNP or V.42 mode

DCE LINE SPEED (PARTIALLY BIT-MAPPED)

Type:

Register

Format

AT [cmds] S35=n [cmds]

Description:

Sets the maximum allowable data exchange rate attempted during handshake process and limits x2 back channel operation

Command

Function

S35=0

No back channel rate

S35=1

28.8Kbps

S35=2

26.4Kbps

S35=3

24.0Kbps

S35=4

21.6Kbps

S35=5

19.2Kbps

S35=6

16.8Kbps

S35=7

14.4Kbps

Bit

Value

Function

3

í 0

1

X2 server operation enabled

4

í 0

1

A /m law operation enabled

5

í 0

1

A /m law detection disabled

6

í 0

1

Reduced power disabled

7

0

Reserved

DTR IGNORE TIME ON CONNECT

Type:

Register

Format

AT [cmds] S25=n [cmds]

Range:

0-255

Unit:

.01 second

Description:

Sets time modem waits to hang-up when DTR signal shuts off

FLOW CONTROL CHARACTER - XOFF

Type:

Register

Format:

AT [cmds] S23=n [cmds]

Range:

0-255

Unit:

ASCII

Description:

Sets the character used to represent XOFF

FLOW CONTROL CHARACTER - XON

Type:

Register

Format:

AT [cmds] S22=n [cmds]

Range:

0-255

Unit:

ASCII

Description:

Sets the character used to represent XON

INACTIVITY TIMER

Type:

Register

Format

AT [cmds] S19=n [cmds]

Range:

0-255

Unit:

1min

Description:

Maximum duration of DTE and DCE inactivity allowed prior to initiating hang-up process.