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COURIER V.32/PC

U.S. ROBOTICS, INC.

COURIER V.32/PC

Card Type

Modem (asynchronous)

Chip Set

U.S. Robotics

Maximum Data Rate

14.4Kbps

Data Bus

Unidentified

Data Modulation Protocol

Unidentified

Error Correction/Compression

Unidentified

V1985

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í DTR normal

SW1/1

Off

DTR forced high

SW1/1

On

í Verbal result codes

SW1/2

Off

Numeric result codes

SW1/2

On

í Enable result codes displayed

SW1/3

On

Disable result codes displayed

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 signal forced high

SW1/6

On

í Display result codes in originate and answer mode

SW1/7

Off

Display result codes in originate mode only

SW1/7

On

í Smart mode enabled

SW1/8

On

Dumb mode enabled

SW1/8

Off

í Normal operation enabled

SW1/9

On

Escape sequence enabled

SW1/9

Off

í Restore NVRAM defaults

SW1/10

Off

Restore factory defaults

SW1/10

On

Proprietary AT Command Set

ABORT

Type:

Immediate

Format:

Any key

Description:

Aborts answering/originating a call; modem hangs up.

ANSWER

Type:

Immediate

Format:

AT [cmds] A

Description:

Enables manual answer mode, the modem goes off-hook; pressing any key will abort.

ANSWER SEQUENCE

Type:

Configuration

Format:

AT [cmds] Bn [cmds]

Description:

Selects the answer sequence the modem will use

Command

Function

í B0

V.32 mode/ITU-T answer sequence enabled

B1

HST mode/Bell answer tone enabled

ATTENTION

Type:

Immediate

Format:

AT [cmds]

Description:

Tells the modem that a command follows or use alone to test OK result code

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, HST modulation, 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

1

HST modulation enabled

HST modulation disabled

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, custom applications and MNP compliance.

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

300bps back channel enabled

300bps 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

Custom applications only

Custom applications only

6

í 0

1

MNP normal

MNP adjusted for non compliant modems

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, and high speed rate shift

Bit

Value

Function

0

í 0

1

V.21 disabled

V.21 enabled

1

í 0

1

V.32 non-trellis coding disabled

V.32 non-trellis coding enabled

2

í 0

1

V.32 modulation enabled

V.32 modulation disabled

3 - 5

í 000

Not used

6

í 0

1

19.2Kbps enabled. High speed rate shift needs to be enabled.

38.4Kbps enabled. High speed rate shift needs to be enabled.

7

í 0

1

High speed rate shift disabled

High speed rate shift enabled

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

CLOCK

Type:

Configuration

Format:

AT [cmds] Kn [cmds]

Description:

Displays connection duration or real time

Command

Function

í K0

Connection duration displayed in ATI3

K1

Real time displayed in ATI3. To set clock (military time) use ATI3=HH:MM:SSK1.

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

&S2

DSR toggled, CTS follows CD

&S3

DSR toggled

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.

"

Dials letters as if they were numbers; ATDT"GOMICRO"

!

Flash function initiated

@

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:

0-255

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.

DSR DELAY

Type:

Register

Format:

AT [cmds] S24=n [cmds]

Default:

25

Range:

0-255

Unit:

.1 second

Description:

Sets the length of the DSR pulse signal

ECHO

Type:

Configuration

Format:

AT [cmds] En [cmds]

Description:

Controls echo function; display keyboard commands when enabled.

Command

Function

E0

Echo function disabled

E1

Echo function enabled

ECHO - ON-LINE

Type:

Configuration

Format:

AT [cmds] Fn [cmds]

Description:

Selects whether data sent while in data mode are echoed

Command

Function

F0

Local echo enabled

í F1

Local echo disabled

ESCAPE SEQUENCE

Type:

Immediate

Format:

+++AT [cmds] <CR>

Description:

Initiates the escape sequence and returns the modem to the on-line command state if it receives three escape characters set in S2 within the time allotted by S12.

Note: Do not precede this command with AT.

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 CTS after RTS. See S26 on length of time.

&R1

Modem ignores RTS

í &R2

Received data to DTE when RTS is on

FLOW CONTROL PASSTHROUGH

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

&I3

ENQ/ACK enabled in host mode

&I4

ENQ/ACK enabled in terminal mode

&I5

XON/XOFF passthrough disabled in error correction mode

GUARD TONE

Type:

Configuration

Format:

AT [cmds] &Gn [cmds]

Description:

Commands the modem to transmit a guard tone

Note: Used primarily for international data transmission

Command

Function

í &G0

Guard tone disabled

&G1

550Hz guard tone enabled

&G2

1800Hz guard tone enabled

HOOK CONTROL

Type:

Immediate

Format:

AT [cmds] Hn [cmds]

Description:

Selects whether the modem is on-hook or off-hook

Command

Function

H0

Modem commanded to go on-hook (hang-up)

H1

Modem commanded to go off-hook (pick-up)

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

ON-LINE

Type:

Immediate

Format:

AT [cmds] O [cmds]

Description:

Returns to on-line command (data transmission) mode.

Note: The O command must be placed at the end of the command string.

ON-LINE HELP

Type:

Immediate

Format:

AT [cmds] $ [cmds]

Description:

On-line help; displays basic command list.

PAUSE

Type:

Immediate

Format:

AT [cmds] / (slash) [cmds]

Description:

125 msec delay before proceeding with dial string or command

PULSE DIALING

Type:

Configuration

Format:

AT [cmds] P [cmds]

Description:

Enables pulse dialing

Note: This command can be duplicated with the P modifier in the D (Dial) command.

PULSE DIALING RATIO

Type:

Configuration

Format:

AT [cmds] &Pn [cmds]

Description:

Selects pulse dial make/break ratio

Command

Function

&P0

39/61ms at 10pps (North America)

&P1

33/67ms at 10pps (Europe)

RECEIVE-ONLY

Type:

Configuration

Format:

AT [cmds] Cn [cmds]

Description:

Sets receive-only; used if modem is attached to additional monitoring-only systems

Command

Function

C0

Disables transmitter

í C1

Enables transmitter

REPEAT COMMAND STRING

Type:

Configuration

Format:

AT [cmds] > [cmds]

Example:

AT>DT5551212 or ATDT5551212>

Description:

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

Note: If used before or after the ATD command, the modem will redial the number until a connection is established or a maximum of ten attempts is reached.

REPEAT PREVIOUS COMMAND

Type:

Immediate

Format:

A/

Description:

Repeats previous command; mainly used for redial.

Note: Do not precede this command with AT, or follow it with <CR>.

RTS/CTS DELAY

Type:

Register

Format:

AT [cmds] S26=n [cmds]

Default:

1

Range:

0-255

Unit:

.1 second

Description:

Sets the length of time between RTS and CTS

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 RAM checksum

I3

Reports connection duration and real time

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

Q0

Result code sending enabled

Q1

Result code sending disabled

RESULT CODE FORMAT

Type:

Configuration

Format:

AT [cmds] Vn [cmds]

Description:

Selects word or numeric format for information-text and result codes

Command

Function

V0

Numeric format enabled

V1

Verbose (word) format enabled

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.

í X1

Busy and dial tone detection disabled; result codes 0-5, 10, 13, and 18 enabled

X2

Busy tone detection disabled, dial tone detection enabled; result codes 0-6, 10, 13, and 18 enabled; also adaptive dialing, and fast dialing enabled.

X3

Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-18 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled.

X4

Busy and dial tone detection enabled; result codes 0-10, 13, and 18 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled.

X5

Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-18 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled.

X6

Busy and dial tone detection enabled; result codes 0-18 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled.

X7

Busy and dial tone detection enabled; result codes 0-11, 13, and 18 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, and 18.

SOFT RESET

Type:

Immediate

Format:

AT [cmds] Z [cmds]

Description:

Restores modem software default profile

SPEAKER MODE

Type:

Configuration

Format:

AT [cmds] Mn [cmds]

Description:

Selects various speaker options

Command

Function

M0

Speaker disabled

í M1

Speaker enabled until carrier signal detected

M2

Speaker enabled

M3

Speaker enabled following dialing, then disabled after carrier signal detected.

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

STATUS-REGISTER

Type:

Configuration

Format:

Read: AT [cmds] Sn? [cmds]

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

TEST MODES

Type:

Configuration

Format:

AT [cmds] S16=n [cmds]

Description:

Controls loopback tests, analog, digital, remote digital, and self tests.

Command

Function

S16=0

Testing disabled

S16=1

Local digital loopback enabled

S16=2

Dial test (Factory testing only)

S16=4

Test pattern enabled (transmitted on CONNECT, either on answering or originate)

S16=5

Local analog loopback and test pattern enabled

S16=8

Remote digital loopback enabled

TONE DIALING

Type:

Configuration

Format:

AT [cmds] T [cmds]

Description:

Enables tone dialing mode

Note: This command can be duplicated with the T modifier in the D (Dial) command.

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