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COURIER V.32

3COM CORPORATION

COURIER V.32

Card Type

Modem (synchronous/asynchronous)

Chip Set

Unidentified

Maximum Data Rate

9600bps

Data Bus

External

Data Modulation Protocol

Bell 103/212A

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

Error Correction/Compression

MNP5

CONNECTIONS

Function

Label

Function

Label

Power switch

SW1

Line out

CN3

DC power

CN1

RS-232/422

CN4

Line in

CN2

   

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í DTR forced high

SW2/1

On

DTR normal

SW2/1

Off

í Verbose result codes

SW2/2

Off

Numeric result codes

SW2/2

On

í Result code display enabled

SW2/3

On

Result code display disabled

SW2/3

Off

í Local echo enabled

SW2/4

Off

Local echo disabled

SW2/4

On

í Auto answer disabled

SW2/5

On

Auto answer enabled

SW2/5

Off

í CD signal normal

SW2/6

Off

CD forced high

SW2/6

On

í Result codes displayed during originate and answer modes

SW2/7

Off

Result codes not displayed during answer mode when SW1/3 is On

SW2/7

On

í Smart mode

SW2/8

On

Dumb mode

SW2/8

Off

í Modem goes on-hook, command mode enabled, ‘OK’ reported

SW2/9

On

Modem remains off-hook, command mode enabled, ‘NO CARRIER’ reported

SW2/9

Off

í Load configuration from NVRAM

SW2/10

Off

Load configuration from ROM

SW2/10

On

DTE/DCE MODE SELECTION

Setting

SW3/1

SW3/2

SW3/3

SW3/4

DCE mode

Off

Off

Off

Off

DTE mode

On

On

On

On

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

HS

Red

On

Modem is operating at 2400bps or faster

HS

Red

Off

Modem is operating at slower than 2400bps

AA

Red

On

Auto-answer enabled

AA

Red

Off

Auto-answer disabled

CD

Red

On

Carrier signal detected or when SW2/6 is on

CD

Red

Off

Carrier signal not detected

OH

Red

On

Modem is off-hook

OH

Red

Off

Modem is on-hook

RD

Red

Blinking

Modem is receiving data

RD

Red

Off

Modem is not receiving data

SD

Red

Blinking

Modem is transmitting data

SD

Red

Off

Modem is not transmitting data

MR

Red

On

Power is on

MR

Red

Off

Power is off

MR

Red

Blinking

During test mode, retraining, including online fallback

RS

Red

On

RTS signal is high

RS

Red

Off

RTS signal is low

CS

Red

On

CTS signal is high and during synchronous mode

CS

Red

Off

CTS signal is low, synchronous mode disabled

ARQ

Red

On

Error correction enabled

ARQ

Red

Off

Error correction disabled

ARQ

Red

Blinking

Error correction activated

SYN

Red

On

AT&M3 is set or AT&M1 and synchronous mode is set

SYN

Red

Off

Modem not in synchronous mode

SUPPORTED COMMAND SET

Basic AT Commands

AT, ‘+++’, A/

A, E, F, H, M, O, P, Q, S, T, V, X

&F, &G, &J, &P, &W, &X, &Z

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S26

Note: See MHI Help file for full command documentation.

Proprietary AT Command Set

ABORT

Type:

Immediate

Format:

<any key>

Description:

Aborts current command issued; dial, repeat mode (>), and repeat command (A>)

BIT-MAPPED REGISTER S13

Format

AT [cmds] S13=n [cmds]

Default:

0

Range:

0-255

Unit:

Bit-mapped

Description:

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

Bit

Value

Function

0

í 0

1

DTR normal

Reset on low DTR

1

í 0

1

Normal auto answer operation

When ring is received, enter originate and listen for answer tone

2

í 0

1

Pause 250msec. Before displaying result codes

Immediate result code display

3

í 0

1

DTR dialing disabled

DTR dialing enabled

4

í 0

1

Reset dialing disabled

Reset dialing enabled

5

í 0

Not used

6

í 0

1

MNP 3 enabled

MNP 3 disabled

7

í 0

1

Hardware reset disabled

Hardware reset enabled

BIT-MAPPED REGISTER S15

Format:

AT [cmds] S15=n [cmds]

Default:

0

Range:

0-255

Unit:

Bit-mapped

Description:

Controls HST high frequency equalization, online fallback, back channel, non-error-correcting mode buffer, MNP4, and BS/DEL switch, MNP compliance, and Interbridge network compatibility.

Bit

Value

Function

0

í 0

1

HST high frequency equalization enabled

HST high frequency equalization disabled

1

í 0

1

Online fallback enabled

Online fallback disabled

2

í 0

1

450bps back channel enabled

450bps back channel disabled

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

Use backspace key for delete disabled

Use backspace key for delete enabled (May cause software incompatibility)

6

í 0

1

MNP normal

MNP adjusted for non compliant modems

7

í 0

1

Interbridge network compatibility disabled

Interbridge network compatibility enabled

BREAK LENGTH

Type:

Register

Format:

AT [cmds] S21=n [cmds]

Default:

10

Range:

Unidentified

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

í &Y1

Break empties buffer and is sent immediately

&Y2

Break does not empty buffer and is sent immediately

&Y3

Send break with transmitted data

COMMPRESSION

Type:

Configuration

Format:

AT [cmds] &Kn [cmds]

Description:

Controls data compression

Command

Function

&K0

Data compression disabled

í &K1

Auto enable/disabled data compression

&K2

Data compression enabled

CONNECTION SPEED

Type:

Configuration

Format:

AT [cmds] &Nn [cmds]

Description:

Sets required connection speed

Command

Function

í &N0

Variable

&N1

300bps

&N2

1200bps

&N3

2400bps

&N4

4800bps

&N5

7200bps

&N6

9600bps

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 connected

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 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, then continue to execute the rest of the dial string

R

Answer mode enabled, originate mode disabled following handshake initiation

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 for modem 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.

DSR TIMER

Type:

Register

Format:

AT [cmds] S24=n [cmds]

Default:

0

Range:

0-25

Unit:

.01 second

Description:

Sets the delay between DSR pulses, when &S1 is set

ERROR CORRECTION MODE

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Description:

Selects active error correction protocols

Command

Function

&M0

Normal mode only

&M3

Continuos synchronous mode

í &M4

Auto-detect mode

&M5

ARQ mode only

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] &An [cmds]

Description:

Selects extended result codes

Command

Function

&A0

/ARQ result codes disabled

í &A1

/ARQ result codes enabled

FLOW CONTROL CHARACTER - XOFF

Type:

Register

Format:

AT [cmds] S23=n [cmds]

Default:

19

Range:

11-127

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:

11-127

Unit:

ASCII

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

í &H0

Flow control disabled

&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

&R0

Delay RTS signal before sending CTS signal

í &R1

Modem ignores RTS

&R2

Received data to DTE when RTS is on

FLOW CONTROL PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] &In [cmds]

Description:

Allows modem to act on and then transmit XON/XOFF characters

Command

Function

í &I0

Software flow control disabled

&I1

XON/XOFF pass-through enabled

&I2

XON/XOFF pass-through disabled

&I3

Host mode enabled, Hewlett Packard protocol

&I4

Terminal mode enabled, Hewlett Packard protocol

&I5

XON/XOFF to remote for non-ARQ link flow control enabled

HELP SCREENS

Type:

Immediate

Format:

AT <prefix>$

Description:

Shows command help screens for all commands beginning with the given prefix, or no prefix if none is given.

Command

Function

$

Shows command summary help screen

&$

Shows extended command summary help screen

D$

Shows dial command summary help screen

S$

Shows S-register summary help screen

<CTRL>-S

Stop/restart display of help screen

<CTRL>-C

Cancel display of help screen

<CTRL>-K

Cancel display of help screen

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.

LEASED LINE

Type:

Configuration

Format:

AT [cmds] &Ln [cmds]

Description:

Controls lease line operation

Command

Function

í &L0

lease line operation disabled

&L1

lease line operation enabled

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] &Bn [cmds]

Description:

Sets operation of serial port speed

Command

Function

í &B0

Serial speed follows connect speed

&B1

Serial speed locked

&B2

Serial speed locked in ARQ mode only

MODULATION SELECTION

Type:

Register

Format:

AT [cmds] S27=n [cmds]

Description:

Controls the modulation for 300bps transmission

Command

Function

S27=0

Bell103 only

S27=1

ITU-T V.21, all calls answered in either Bell103 or V.21, originate calls in V.21

PAUSE

Type:

Configuration

Format:

AT [cmds] / [cmds]

Description:

Command string execution is paused for 125ms

Note:

Multiple slashed can be used consecutively to add up to the duration of delay desired.

REPEAT COMMAND CONTINUALLY

Type:

Configuration

Format:

AT [cmds] > [cmds]

Description:

Causes modem to repeat command continually until <any key> is pressed

Note:

If used in the dial string, 10 attempts will be made.

REPEAT COMMAND STRING

Type:

Configuration

Format:

AT [cmds] A> [cmds]

Description:

Causes modem to repeat continually last issued command until <any key> is pressed

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays modem properties

Command

Function

I0

Reports product code

I1

Reports ROM checksum result

I2

Reports RAM checksum result

I3

Reports current call time or clock time

I4

Reports current command settings

I5

Reports current NVRAM settings

I6

Reports current connection’s statistics

I7

Reports product configuration

TEST MODES

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Description:

Selects modem test modes

Command

Function

í S16=0

Test mode disabled

S16=1

Analog loopback test enabled

S16=2

Dial test enabled

S16=4

Test pattern enabled

S16=5

Analog loopback test with test pattern enabled

S16=8

Remote digital loopback enabled

TIME DISPLAY

Type:

Immediate

Format:

AT [cmds] Kn [cmds]

Description:

Displays the current call time or clock time

Command

Function

í K0

Display length of last call

K1

Display actual time

TRANSMITTER

Type:

Configuration

Format:

AT [cmds] Cn [cmds]

Description:

Controls the transmitter

Command

Function

C0

Transmitter disabled, receive only mode

í C1

Transmitter enabled

V.32 - HANDSHAKE TIME

Type:

Register

Format:

AT [cmds] S28=n [cmds]

Default:

8

Range:

0-255

Unit:

.1 second

Description:

Sets length of V.32 handshake