ECHO COMMUNICATIONS

I336PF

Card Type

Modem (asynchronous)

Chipset

U.S. Robotics

Maximum Data Rate

33.6Kbps

Maximum Fax Rate

14.4Kbps

Data Modulation

Bell 103A/212A

ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis, V.34

Rockwell V.FC

Fax Modulation

ITU-T V.17, V21CH2, V.27ter, V.29

Error Correction/Compression

MNP5, V.42, V.42bis

Fax Class

Class I & II

Data Bus

8-bit ISA

CONNECTIONS

Function

Label

Function

Label

Telephone line

CN1

Telephone line

CN2

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, B, C, D, E, F, H, L, M, O, P, Q, T, V, X

&C, &D, &G, &P, &R, &S, &T, &W

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S38

Note: See MHI help file for complete information.

Proprietary AT Command Set

BIT-MAPPED REGISTER S13

Format

AT [cmds] S13=n [cmds]

Default:

0

Range:

0 - 217

Description:

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

Bit

Value

Function

0

í 0

1

DTR normal.

Reset on low DTR.

2, 1

00

Not used.

3

í 0

1

DTR dialing disabled.

DTR dialing enabled.

4

í 0

1

Reset dialing disabled.

Reset dialing enabled.

5

0

Not used.

6

í 0

1

MNP 3 enabled.

MNP 3 disabled.

BIT-MAPPED REGISTER S15

Format:

AT [cmds] S15=n [cmds]

Default:

0

Range:

0 - 56

Description:

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

Bit

Value

Function

2 - 0

000

Not used.

3

í 0

1

Non-error-correcting mode transmit buffer set to 1.5KB.

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

4

í 0

1

MNP 4 enabled.

MNP 4 disabled.

5

í 0

1

Backspace and delete keys normal.

Backspace and delete keys reversed.

BIT-MAPPED REGISTER S27

Format:

AT [cmds] S27=n [cmds]

Default:

0

Range:

0 - 191

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 disabled.

V.21 enabled.

1

í 0

1

V.32 trellis coding enabled.

V.32 trellis coding disabled.

2

í 0

1

V.32 modulation enabled.

V.32 modulation disabled.

3

í 0

1

2100Hz answer tone enabled.

2100Hz answer tone disabled.

5, 4

í 00

01

10

11

V.42 detect, LAPM and MNP enabled.

V.42 detect and LAPM enabled.

MNP enabled.

LAPM enabled.

6

0

Not used.

7

í 0

1

Actual result codes displayed.

Force 9600 result codes.

BREAK LENGTH

Type:

Register

Format:

AT [cmds] S21=n [cmds]

Default:

10

Range:

0 - 255

Unit:

10 ms

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

Break empties buffer and is not send to remote modem.

í &Y1

Break empties buffer and is sent immediately to remote modem.

&Y2

Break does not empty buffer and is sent immediately to remote modem.

COMPRESSION AND ERROR CORRECTION

Type:

Register

Format:

AT [cmds] S51=n [cmds]

Default:

0

Range:

0 - 7

Description:

Selects compression and error correction for specific modulations.

Bit

Value

Function

0

í 0

1

MNP/V.42 enabled during V.22 operation.

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

1

í 0

1

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

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

2

í 0

1

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

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

COMPRESSION MODE

Type:

Configuration

Format:

AT [cmds] &Kn [cmds]

Description:

Selects the type of data compression that will be used.

Command

Function

&K0

Data compression disabled.

í &K1

Auto-detect compression mode.

&K2

Data compression enabled.

&K3

MNP5 data compression only enabled.

CONNECTION SPEED UPPER LIMIT

Type:

Configuration

Format:

AT [cmds] &Nn [cmds]

Description:

Sets required connection speed if &U is set to 0; otherwise, sets fastest allowed connection speed.

Command

Function

í &N0

No maximum connect speed.

&N1

Set maximum connect speed to 300bps.

&N2

Set maximum connect speed to 1200bps.

&N3

Set maximum connect speed to 2400bps.

&N4

Set maximum connect speed to 4800bps.

&N5

Set maximum connect speed to 7200bps.

&N6

Set maximum connect speed to 9600bps.

&N7

Set maximum connect speed to 12Kbps.

&N8

Set maximum connect speed to 14.4Kbps.

&N9

Set maximum connect speed to 16.8Kbps.

&N10

Set maximum connect speed to 19.2Kbps.

&N11

Set maximum connect speed to 21.6Kbps.

CONNECTION SPEED UPPER LIMIT (CON’T)

Command

Function

&N12

Set maximum connect speed to 24Kbps.

&N13

Set maximum connect speed to 26.4Kbps.

&N14

Set maximum connect speed to 28.8Kbps.

&N15

Set maximum connect speed to 31.2Kbps.

&N16

Set maximum connect speed to 33.6Kbps.

CONNECTION SPEED LOWER LIMIT

Type:

Configuration

Format:

AT [cmds] &Un [cmds]

Description:

Sets slowest allowed connection speed if &N is set to 1 or higher.

Command

Function

í &U0

No minimum connect speed.

&U1

Set minimum connect speed to 300bps.

&U2

Set minimum connect speed to 1200bps.

&U3

Set minimum connect speed to 2400bps.

&U4

Set minimum connect speed to 4800bps.

&U5

Set minimum connect speed to 7200bps.

&U6

Set minimum connect speed to 9600bps.

&U7

Set minimum connect speed to 12Kbps.

&U8

Set minimum connect speed to 14.4Kbps.

&U9

Set minimum connect speed to 16.8Kbps.

&U10

Set minimum connect speed to 19.2Kbps.

&U11

Set minimum connect speed to 21.6Kbps.

&U12

Set minimum connect speed to 24Kbps.

&U13

Set minimum connect speed to 26.4Kbps.

&U14

Set minimum connect speed to 28.8Kbps.

DISPLAY INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays modem properties.

Command

Function

I0

Displays product identification code.

I1

Tests and displays ROM checksum result.

I2

Tests and displays RAM checksum result.

I3

Displays product type.

I4

Displays current command settings.

I5

Displays current NVRAM settings.

I6

Displays current connection’s statistics.

I7

Displays product configuration.

DISPLAY LAST DIAL STRING

Type:

Immediate

Format:

AT [cmds] &ZL? [cmds]

Description:

Displays the last executed dial string.

ERROR CORRECTION MODE

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 SEQUENCE RESPONSE

Type:

Register

Format:

AT [cmds] S14=n [cmds]

Description:

Controls the modem's reaction to an escape sequence.

Command

Function

S14=0

Normal operation.

S14=1

When +++ is received, modem disconnects and enters command state.

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

V.32 result code enabled.

í &A3

Error control and compression result codes enabled.

FACTORY DEFAULTS

Type:

Immediate

Format:

AT [cmds] &Fn [cmds]

Description:

Resets the modem to the specified factory profile.

Command

Function

&F0

Modem resets to factory generic profile.

&F1

Modem resets to factory hardware flow control profile.

&F2

Modem resets to factory software flow control profile.

FLOW CONTROL CHARACTER - XOFF

Type:

Register

Format:

AT [cmds] S23=n [cmds]

Default:

19

Range:

0 - 127

Unit:

1 ASCII character

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:

1 ASCII character

Description:

Sets the character used to represent XON.

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.

HELP - AMPERSAND

Type:

Immediate

Format:

AT [cmds] &$

Description:

Displays the AT& command set.

HELP - BASIC

Type:

Immediate

Format:

AT [cmds] $

Description:

Displays the basic (no prefix) AT command set.

HELP - DIAL

Type:

Immediate

Format:

AT [cmds] D$

Description:

Displays dialing options.

INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] S19=n [cmds

Default:

0

Range:

0 - 255

Unit:

1 minute

Description:

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

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.

PROFILE ON POWER-UP

Type:

Configuration

Format:

AT [cmds] Yn [cmds]

Description:

Selects the profile to restore into the active profile on power-up.

Command

Function

í Y0

Restore profile 0 on power-up.

Y1

Restore profile 1 on power-up.

RESET MODEM

Type:

Immediate

Format:

AT [cmds] Zn [cmds]

Description:

Resets the modem to the specified profile.

Command

Function

Z0

Modem resets to profile set with the Y command.

Z1

Modem resets to user profile 0.

Z2

Modem resets to user profile 1.

Z3

Modem resets to factory generic profile.

Z4

Modem resets to factory hardware flow control profile.

Z5

Modem resets to factory software flow control profile.

STORE TELEPHONE NUMBER

Type:

Configuration

Format:

AT [cmds] &Zn=<#>

AT [cmds] &Zn=L

Description:

Writes the indicated telephone number into the non-volatile memory at location n. If the second form is used, the last dial string executed will be stored.

TONE DIALING TEST

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Description:

Begins a tone dialing test.

Command

Function

í S16=0

Tone dialing test disabled.

S16=2

Tone dialing test enabled.

V.32 AND V.32bis MODULATIONS

Type:

Register

Format:

AT [cmds] S34=n [cmds]

Default:

6

Range:

0 - 15

Description:

Controls V.32 and V.32bis modulations.

Bit

Value

Function

0

í 0

1

V.32bis enabled.

V.32bis disabled.

2, 1

11

Not used.

3

í 0

1

V.32 modulation disabled.

V.32 modulation enabled.

V.32 HANDSHAKE TIME

Type:

Register

Format:

AT [cmds] S28=n [cmds]

Default:

8

Range:

0 - 255

Unit:

.1 second

Description:

Sets the length of the V.32 handshaking phase.

V.34 AND V.FC OPTIONS

Format:

AT [cmds] S56=n [cmds]

Default:

0

Range:

0 - 223

Description:

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

Bit

Value

Function

0

í 0

1

Non-linear coding enabled.

Non-linear coding disabled.

1

í 0

1

Transmit level deviation enabled.

Transmit level deviation disabled.

2

í 0

1

Pre-emphasis enabled.

Pre-emphasis disabled.

3

í 0

1

Pre-coding enabled.

Pre-coding disabled.

4

í 0

1

Shaping enabled.

Shaping disabled.

5

0

Not used.

6

í 0

1

V.34 enabled.

V.34 disabled.

7

í 0

1

V.FC enabled.

V.FC disabled.

V.34 MAPPING

Type:

Register

Format:

AT [cmds] S55=n [cmds]

Default:

0

Range:

0 - 15

Description:

Controls V.34 mapping.

Bit

Value

Function

0

í 0

1

8S-2D map enabled.

8S-2D map disabled.

1

í 0

1

16S-4D map enabled.

16S-4D map disabled.

2

í 0

1

32S-2D map enabled.

32S-2D map disabled.

3

í 0

1

64S-4D map enabled.

64S-4D map disabled.

V.34 OPTIONS

Type:

Register

Format:

AT [cmds] S54=n [cmds]

Default:

0

Range:

0 - 255

Description:

Controls V.34 baud rate, call indicate, and V.8.

Bit

Value

Function

0

í 0

1

2400 baud rate enabled.

2400 baud rate disabled.

1

í 0

1

2743 baud rate enabled.

2743 baud rate disabled.

2

í 0

1

2800 baud rate enabled.

2800 baud rate disabled.

3

í 0

1

3000 baud rate enabled.

3000 baud rate disabled.

4

í 0

1

3200 baud rate enabled.

3200 baud rate disabled.

5

í 0

1

3429 baud rate enabled.

3429 baud rate disabled.

6

í 0

1

Call indicate during V.34 operation enabled.

Call indicate during V.34 operation disabled.

7

í 0

1

V.8 during V.34 operation enabled.

V.8 during V.34 operation disabled.

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] &In [cmds]

Description:

Selects whether XON/XOFF signals received from the DTE are sent to the remote modem.

Command

Function

í &I0

Software flow control disabled.

&I1

XON/XOFF passed through local modem.

&I2

XON/XOFF signals trapped by local modem.