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COURIER HST

U.S. ROBOTICS, INC.

COURIER HST

Modem Type

Data (synchronous/asynchronous)

Maximum Data Rate

9600bps

Data Bus

External

Data Modulation Protocol

Bell 103A/212A

ITU-T V.22bis

USR HST

Error Correction/Compression

MNP5

CONNECTIONS

Purpose

Location

Purpose

Location

Line in

CN1

DC power

CN4

Line out

CN2

Power switch

SW2

RS-232/422

CN3

   

DTR SIGNAL

Setting

SW1/1

» On

DTR forced high

Off

DTR normal

RESULT CODES

Setting

SW1/2

» Off

Verbal result codes enabled

On

Numeric result codes enabled

RESULT CODES DISPLAY

Setting

SW1/3

» On

Display disabled

Off

Display enabled

ECHO COMMANDS DISPLAY

Setting

SW1/4

» Off

Local echo enabled

On

Local echo disabled

AUTO ANSWER

Setting

SW1/5

» On

Modem does not answer on first ring

Off

Modem answers on first ring

CARRIER DETECT

Setting

SW1/6

» Off

CD normal

On

CD forced high

MULTILINE PHONE INSTALLATION

Setting

SW1/7

» Off

Single phone connected

On

Multiple phones connected

AT COMMAND SET

Setting

SW1/8

» On

AT command set recognized

Off

AT command set disabled

ESCAPE CODE

Setting

SW1/9

» On

Go to command mode and display OK result code when escape character is received

Off

Disconnect, go to command mode and display NO CARRIER when escape character is received

USER PROFILE

Setting

SW1/10

» Off

Use stored profile

On

Use factory default

TX/RX PIN ASSIGNMENT

Setting

SW3

» Off

Normal operation

On

Reverse TX/RX pin assignments

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

HS

Red

On

Modem is operating at 9600bps

HS

Red

Off

Modem is operating at slower than 9600bps

AA

Red

On

Auto-answer enabled

AA

Red

Off

Auto-answer disabled

CD

Red

On

Carrier signal detected

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

TD

Red

Blinking

Modem is transmitting data

TD

Red

Off

Modem is not transmitting data

TR

Red

On

DTR signal is high

TR

Red

Off

DTR signal is low

MR

Red

On

Power is on

MR

Red

Off

Power is off

MR

Red

Blinking

Modem is retraining or in test mode.

RS

Red

On

RTS signal is high

RS

Red

Off

RTS signal is low

CS

Red

On

CTS signal is high

CS

Red

Off

CTS signal is low

EC

Red

On

Error correction enabled

EC

Red

Off

Error correction disabled

EC

Red

Blinking

Modem is retransmitting data

AL

Red

On

Analog loopback self test mode enabled.

AL

Red

Off

Normal operation

Proprietary AT Command Set

BIT-MAPPED REGISTER S13

Format

AT [cmds] S13=n [cmds]

Example:

ATS13=139<CR>

Default:

0

Range:

0 - 255

Unit:

Bit-mapped

Description:

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

Bit

Value

Function

0

» 0

1

DTR normal.

Reset on low DTR.

1

» 0

1

Normal auto answer operation.

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

2

» 0

1

Pause 250ms before displaying result codes.

Immediate result code display.

3

» 0

1

DTR dialing disabled.

DTR dialing enabled.

4

» 0

1

Reset dialing disabled.

Reset dialing enabled.

5

» 0

Not used.

6

» 0

1

MNP 3 enabled.

MNP 3 disabled.

7

» 0

1

Hardware reset disabled.

Hardware reset enabled.

BIT-MAPPED REGISTER S15

Format:

AT [cmds] S15=n [cmds]

Example:

ATS15=139<CR>

Default:

0

Range:

0 - 255

Unit:

Bit-mapped

Description:

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

Bit

Value

Function

0

» 0

1

HST high frequency equalization enabled.

HST high frequency equalization disabled.

1

» 0

1

Online fallback enabled.

Online fallback disabled.

2

» 0

1

450bps back channel enabled.

450bps back channel disabled.

3

» 0

1

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

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

4

» 0

1

MNP 4 enabled.

MNP 4 disabled.

5

» 0

1

Use backspace key for delete disabled.

Use backspace key for delete enabled.

6

» 0

1

MNP normal.

MNP adjusted for non compliant modems.

7

» 0

1

Proprietary network compatibility disabled.

Proprietary network compatibility enabled.

BREAK LENGTH

Type:

Register

Format:

AT [cmds] S21=n [cmds]

Example:

ATS21=20<CR>

Default:

10

Range:

Unidentified

Unit:

10 ms

Description:

Sets the length of Error correction mode breaks sent from DCE to DTE.

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] &Yn [cmds]

Example:

AT &Y0<CR>

Description:

Configures action of break signal.

Command

Function

&Y0

Break empties buffer.

» &Y1

Break empties buffer and is sent immediately.

&Y2

Break does not empty buffer and is sent immediately.

&Y3

Break does not empty buffer and is sent with transmitted data.

CONNECTION SPEED UPPER LIMIT

Type:

Configuration

Format:

AT [cmds] &Nn [cmds]

Example:

AT &N1 DT555-1212<CR>

Description:

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

Command

Function

» &N0

Variable.

&N1

300bps

&N2

1200bps

&N3

2400bps

&N4

4800bps

&N5

7200bps

&N6

9600bps

DISCONNECT DISPLAY

Type:

Immediate

Format:

AT [cmds] S17? [cmds]

Example:

ATS17?<CR>

Default:

Read only

Range:

1-6, 254, 255

Description:

Displays the reason for a disconnect during error correcting mode.

Value

Meaning

S17=1

Received data different than requested.

S17=2

Incompatible MNP protocol.

S17=3

Connection request parameters unknown.

S17=4

Remote modem retry timeout.

S17=5

Inactivity timeout.

S17=6

Destination user not found.

S17=254

Peer protocol error.

S17=255

User initiated disconnect.

ERROR CORRECTION MODE

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Example:

AT &M1 %C1<CR>

Description:

Selects active error correction protocols.

Command

Function

&M0

Normal mode only.

» &M4

Auto-detect mode.

&M5

ARQ mode only.

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] &An [cmds]

Example:

AT &A1 %C1<CR>

Description:

Selects extended result codes.

Command

Function

&A0

Extended result codes disabled.

» &A1

ARQ result codes enabled.

FLOW CONTROL CHARACTER - XOFF

Type:

Register

Format:

AT [cmds] S23=n [cmds]

Example:

ATS23=20<CR>

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]

Example:

ATS22=20<CR>

Default:

17

Range:

11-127

Unit:

ASCII

Description:

Sets the character used to represent XON.

FLOW CONTROL PASSTHROUGH

Type:

Configuration

Format:

AT [cmds] &In [cmds]

Example:

AT &I0 &W<CR>

Description:

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

Command

Function

» &I0

Software flow control disabled.

&I1

XON/XOFF passthrough enabled.

&I2

XON/XOFF passthrough disabled.

&I3

Hewlett-Packard host mode.

&I4

Hewlett-Packard Terminal mode.

&I5

XON/XOFF passthrough for non error correction mode enabled.

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] &Hn [cmds]

Example:

AT &H0 A<CR>

Description:

Sets type of flow control used by modem.

Command

Function

» &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.

PAUSE

Type:

Configuration

Format:

AT [cmds] / [cmds]

Example:

AT /// &W<CR>

Description:

125ms pause for each /.

HELP SCREENS

Type:

Immediate

Format:

AT <prefix>$

Example:

AT &$<CR>

Description:

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

Command

Function

$

Shows ATx help screen.

&$

Shows AT& help screen.

D$

Shows ATDx help screen.

S$

Shows S-register help screen.

INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] S19=n [cmds]

Example:

ATS19=20<CR>

Default:

0

Range:

Unidentified

Unit:

1 minute

Description:

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

NO CARRIER DISPLAY

Type:

Immediate

Format:

AT [cmds] S20? [cmds]

Example:

ATS20?<CR>

Default:

Read only

Range:

0-7

Description:

Displays the reason for a NO CARRIER result code..

Value

Meaning

S20=0

Key press abort.

S20=1

DTR low.

S20=2

Escape code sent.

S20=3

Connection broken.

S20=4

Inactivity timeout.

S20=5

Automatic hangup with error correction incompatibility .

S20=6

Error correction retry timeout.

S20=7

Error correction received disconnect.

REGISTER S18

Note: This register is reserved and should not be changed.

REPEAT COMMAND STRING

Type:

Configuration

Format:

AT [cmds] > [cmds]

Example:

AT *D1 > #E1<CR>

Description:

Causes modem to repeat command string until a keyboard key is pressed.

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Example:

AT I1 O<CR>

Description:

Displays modem properties.

Command

Function

I0

Reports product code.

I1

Reports ROM checksum result.

I2

Reports RAM checksum result.

I3

Reports call duration.

I4

Reports current command settings.

I5

Reports current NVRAM settings.

I6

Reports current connection’s statistics.

I7

Reports configuration.

TEST MODES

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Example:

ATS16=0<CR>

Description:

Controls analog loopback pattern and dial tests

Command

Function

» S16=0

Testing disabled.

S16=1

Analog loopback test enabled.

S16=2

Dial test enabled.

S16=4

Test pattern enabled.

S16=5

Analog loopback with test pattern enabled.

TIME DISPLAY

Type:

Immediate

Format:

AT [cmds] Kn [cmds]

Example:

AT K1 *L2 #E1<CR>

Description:

Displays the current call time or clock time.

Command

Function

» K0

Display length of last call.

K1

Display actual time.