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DISCOVERY LCD

DATATRONICS TECHNOLOGY, INC.

DISCOVERY LCD

Card Type

Modem(synchronous/asynchronous)

Chip Set

Unidentified

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

External

Fax Class

Class II

Data Modulation Protocol

Bell 103A/212A

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

Rockwell V.FC

Fax Modulation Protocol

ITU-T V.17, V.21CH2, V.27ter, V.29

Error Correction/Compression

MNP5, V.42bis

CONNECTIONS

Function

Label

Function

Label

Line out

CN1

Power switch

SW1

Line in/leased line

CN2

LCD panel lock

SW2

RS-232/422

CN3

Voice/data

SW3

DC power

CN4

LCD panel navigation

NAV

Volume

R1

   

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

MR

Yellow

On

Power is on

MR

Yellow

Off

Power is off

TR

Yellow

On

DTR signal is high

TR

Yellow

Off

DTR signal is low

RTS

Yellow

On

RTS signal is high

RTS

Yellow

Off

RTS signal is low

CTS

Yellow

On

CTS signal is high

CTS

Yellow

Off

CTS signal is low

AA

Yellow

On

Auto-answer enabled

AA

Yellow

Off

Auto-answer disabled

AA

Yellow

Blinking

Phone is ringing

RL

Yellow

On

Error correction enabled

RL

Yellow

Off

Error correction disabled

RL

Yellow

Blinking

Error detected

RD

Yellow

Blinking

Modem is receiving data

RD

Yellow

Off

Modem is not receiving data

SD

Yellow

Blinking

Modem is transmitting data

SD

Yellow

Off

Modem is not transmitting data

CD

Yellow

On

Carrier signal detected

CD

Yellow

Off

Carrier signal not detected

OH

Yellow

On

Modem is off-hook

OH

Yellow

Off

Modem is on-hook

Proprietary AT Command Set

ANSWER TONE DETECTION

Type:

Configuration

Format:

AT [cmds] %In [cmds]

Description:

Controls answer tone detection

Command

Function

%I0

Answer tone detection enabled

%I1

Answer tone detection disabled

AUTO REDIAL INTERVAL TIMES

Type

Register

Format

AT [cmds] S19=n [cmds]

Default

2

Range

0-255

Unit

Unidentified

Description

Unidentified

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Configuration

Format:

AT [cmds] %An [cmds]

Default:

0

Range:

0-127

Unit:

ASCII

Description:

Sets the character used as the auto-reliable fallback character. %A0 will disable this function

AUTO-RELIABLE TIME BUFFER CONFIGURATION

Type:

Configuration

Format:

AT [cmds] \Cn [cmds]

Description:

Controls the handling of incoming data during auto-reliable time period

Command

Function

í \CO

Data is discarded

\C1

Data is buffered

\C2

Data is discarded, resets to \C1 on receipt of autoreliable fallback character

AUTO-RETRAIN

Type:

Configuration

Format:

AT %En

Description:

Selects auto-retrain mode

Command

Function

%E0

Auto-retrain disabled

%E1

Three auto-retrains attempted then hang up for 2400bps and above enabled

í %E2

Three auto-retrains attempted then hang up for 2400bps and above enabled

BIT-MAPPED REGISTER S14

Format

AT [cmds] S14=n [cmds]

Default:

136

Range:

0-254

Unit:

Bit-mapped

Description:

Controls echo, result codes, result code display, dumb mode, dial mode, dumb modem and answer/originate mode

Bit

Value

Function

0

0

Not used

1

í 0

1

Command echo disabled

Command echo enabled

2

í 0

1

Result codes enabled

Result codes disabled

3

0

í 1

Display result codes in numeric format

Display result codes in verbose format

4

í 0

1

Smart mode

Dumb mode

5

í 0

1

Tone dial enabled

Pulse dial enabled

6

í 0

1

Smart modem

Dumb modem

7

0

í 1

Answer mode enabled

Originate mode enabled

BIT-MAPPED REGISTER S21

Format:

AT [cmds] S20=n [cmds]

Default:

176

Range:

0-187

Description:

Controls jack type, DSR, DTR, DCD and disconnect options

Bit

Value

Function

0

í 0

1

RJ-11/41S/45S

RJ12-12/13

1

í 0

1

DSR forced high

DSR normal

2

0

Not used

4, 3

00

01

í 10

11

Ignore DTR

Go to command mode on low DTR

Hang up on low DTR

Initialize on low DTR

5

0

í 1

DCD forced high

Normal operation

7, 6

00

01

í 10

Special disconnect disabled

Long space disconnect enabled

Clear down disconnect enabled

BIT-MAPPED REGISTER S22

Format

AT [cmds] S22=n [cmds]

Default:

118

Range:

0 - 255

Unit:

Bit-mapped.

Description:

Controls volume and speaker settings, result codes, and make/break pulse ratio

Bit

Value

Function

1, 0

00

01

í 10

11

Lowest volume setting

Low volume setting

Medium volume setting

Highest volume setting

3, 2

00

í 01

10

11

Speaker disabled

Speaker enabled until carrier signal detected

Speaker enabled

Speaker enabled until carrier signal detected, but disable during dialing

6, 5 ,4

000

001

010

011

í 100

Numeric result codes enabled

Verbose result codes enabled

Dialtone detection enabled

Busy tone detection enabled

Busy and dialtone detection enabled

7

í 0

1

39/61ms at 10pps (North America)

33/67ms at 10pps (Europe)

BIT-MAPPED REGISTER S24

Format:

AT [cmds] S24=n [cmds]

Default:

0

Range:

0-7

Description:

Controls V.25bis options

Bit

Value

Function

0

í 0

1

V.25bis disabled

V.25bis enabled

1

í 0

1

V.25bis asynchronous enabled

V.25bis synchronous enabled

2

í 0

1

V.25bis HDLC enabled

V.25bis bisynchronous enabled

BIT-MAPPED REGISTER S27

Format:

AT [cmds] S27=n [cmds]

Default:

0

Range:

0-236

Description:

Controls synchronous mode, pulse dial speed, clock source, and data protocol

Bit

Value

Function

2, 1, 0

í 000

001

010

011

100

Asynchronous operation

Synchronous mode 1 operation

Synchronous mode 2 operation

Synchronous mode 3 operation

Asynchronous dial

3

í 0

1

Standard pulse dial enabled

Fast pulse dial enabled

5, 4

í 00

01

10

Local DCE transmit clock enabled

Local DTE transmit clock enabled

Remote DCE transmit enabled

7, 6

í 00

01

10

11

V.21, V.22, V.32 enabled

Bell 103A/212A

V.23 back channel

V.23 main channel

BIT-MAPPED REGISTER S29

Format:

AT [cmds] S29=n [cmds]

Default:

3

Range:

31

Description:

Controls data bits, parity and stop bits

Bit

Value

Function

1, 0

00

01

10

í 11

5 data bits

6 data bits

7 data bits

8 data bits

3, 2

í 00

01

10

11

No parity

Space parity

Even parity

Odd parity

4

í 0

1

1 stop bit

2 stop bits

BIT-MAPPED REGISTER S32

Format:

AT [cmds] S32=n [cmds]

Default:

17

Range:

0-191

Description:

Controls ring, call back security, hardware data security, message working bit, V.32 forward/backward link, &Z/@Z working bit and line used

Bit

Value

Function

0

0

í 1

Ring disabled

Ring enabled

1

í 0

1

Call back security disabled

Call back security enabled

2

í 0

1

Hardware data security disabled

Hardware data security enabled

3

í 0

1

Open message working bit

Close message working bit

4

0

í 1

V.32 forward/backward link disabled

V.32 forward/backward link enabled

5

í 0

1

&Z working bit enabled

@Z working bit enabled

7, 6

í 00

01

10

Switched line enabled

2 wire leased line enabled

4 wire leased line enabled

BIT-MAPPED REGISTER S34

Format:

AT [cmds] S34=n [cmds]

Default:

0

Range:

0-63

Description:

Controls V.32 TCM/QAM, DTR dump recognition, RLSD level, asynchronous and soft reset

Bit

Value

Function

0

í 0

1

Enable trellis code modulation

Enable quadratic amplitude modulation

1

í 0

1

Recognize DTR dump in handshaking

Ignore DTR dump in handshaking

3, 2

í 00

01

10

11

RLSD on at, -43dbm off at -48dbm

RLSD on at, -33dbm off at -38dbm

RLSD on at, -26dbm off at -31dbm

RLSD on at, -16dbm off at -21dbm

5, 4

í 00

01

10

Normal AT&F ATZ

Quick ATZ.2

Quick AT&F ATZ

BIT-MAPPED REGISTER S35

Format:

AT [cmds] S35=n [cmds]

Default:

15

Range:

0-232

Description:

Controls Power on auto dial

Bit

Value

Function

3, 2, 1, 0

0000

í 1000

STN for power on auto dial

Power on auto dial disabled

5, 4

í 00

01

10

Restore all disabled

Switched line simulates leased line enabled

Switched line back up enabled

6

í 0

1

Single phone system enabled

Multiple phone systems enabled

7

í 0

1

Disconnect reset disabled

Disconnect reset enabled

BIT-MAPPED REGISTER S39

Format:

AT [cmds] S39=n [cmds]

Default:

153

Range:

0-253

Description:

Controls compression, auto retrain answer tone check, compromise equalizer and detect phase

Bit

Value

Function

0

0

í 1

Data compression disabled

Data compression enabled

2, 1

00

í 01

10

Auto retrain disabled

Auto retrain on same speed

Auto retrain with speed change

4, 3

00

01

10

í 11

Disabled

Transmit only

Receive only

Transmit and receive

5

í 0

1

Answer tone check enabled

Answer tone check disabled

6

í 0

1

Compromise equalizer enabled

Compromise equalizer disabled

7

0

í 1

Detect phase disabled

Detect phase enabled

BIT-MAPPED REGISTER S40

Format:

AT [cmds] S40=n [cmds]

Default:

0

Range:

0-33

Description:

Controls remote access and remote access security

Bit

Value

Function

0

í 0

1

Remote access disabled

Remote access enabled

4, 3, 2, 1

0000

Not used

5

í 0

1

Remote access security disabled

Remote access security enabled

BIT-MAPPED REGISTER S43

Format:

AT [cmds] S43=n [cmds]

Default:

19

Range:

0-155

Description:

Controls MNP block size, dictionary size and data buffer

Bit

Value

Function

1, 0

00

01

10

í 11

Maximum MNP block size 64 characters

Maximum MNP block size 128 characters

Maximum MNP block size 192 characters

Maximum MNP block size 256 characters

2

0

Not used

4, 3

00

01

í 10

11

Maximum dictionary size 512 entries

Maximum dictionary size 1024 entries

Maximum dictionary size 2048 entries

Maximum dictionary size 4048 entries

5

0

Not used

7, 6

í 00

01

10

Disable data buffer

Set buffer to 4 seconds, 200 characters or SYN character detected then switch to normal connection

Data buffer disabled, switch to normal connection

BIT-MAPPED REGISTER S44

Format:

AT [cmds] S44=n [cmds]

Default:

0

Range:

140

Description:

Controls echo, flow control and serial port speed.

Bit

Value

Function

2

í 0

1

On line data echo disabled

On line data echo enabled

3

í 0

1

Modem port flow control disabled

Modem port flow control enabled

6, 5, 4

000

Not used

7

í 0

1

Serial port speed locked

Serial port speed follows connection speed

BIT-MAPPED REGISTER S45

Format:

AT [cmds] S45=n [cmds]

Default:

101

Range:

253

Description:

Controls break control, link type, DTE speed and mode

Bit

Value

Function

2, 1, 0

000

001

010

011

100

í 101

Enter command mode, do not send break

Clear buffer, send break immediately

Enter command mode, do not send break

Do not clear buffer, send break immediately

Enter command mode, do not send break

Send break with transmitted data

3

í 0

1

Stream link enabled

Block link enabled

4

í 0

1

DTE speed follows connect speed

DTE speed locked

7, 6, 5

000

001

010

í 011

100

101

110

111

Normal mode

Direct mode

MNP mode

Auto reliable mode

LAPM mode

LAPM with fallback to normal mode

LAPM with fallback to MNP mode

MNP with fallback to normal mode

BIT-MAPPED REGISTER S46

Format:

AT [cmds] S46=n [cmds]

Default:

75

Range:

0-238

Description:

Controls flow control, ring indicate and result codes

Bit

Value

Function

2, 1, 0

000

001

010

í 011

100

101

110

Flow control disabled

XON/XOFF flow control enabled

Unidirectional hardware flow control enabled

Bidirectional hardware flow control enabled

Unidirectional XON/XOFF flow control enabled

CTS low until connect, then CTS unidirectional flow control enabled

CTS low until connect, then RTS/CTS flow control enabled

3

0

í 1

Ring indicate after handshaking enabled

Ring indicate after handshaking disabled

6, 5, 4

000

001

010

011

í 100

101

110

V.42/MNP result code disabled

V.42/MNP4 and DTE speed result codes enabled

V.42/MNP4 and DCE speed result codes enabled

V.42bis/MNP5 and DTE speed result codes enabled

V.42bis/MNP5 and DCE speed result codes enabled

V.42bis/MNP5 and DTE debug codes enabled

V.42bis/MNP5 and DCE debug codes enabled

7

í 0

1

Flow control character trapped

Flow control character passed through

BIT-MAPPED REGISTER S53

Format:

AT [cmds] S53=n [cmds]

Default:

56

Range:

0-56

Description:

Controls ring indicate reset timer, V.25 calling tone and T30 calling tone

Bit

Value

Function

3, 2, 1, 0

í 1000

Ring indicate reset timer

4

0

í 1

V.25 calling tone disabled

V.25 calling tone enabled

5

0

í 1

T30 calling tone disabled

T30 calling tone enabled

BREAK SEND

Type:

Configuration

Format:

AT [cmds] \Bn [cmds]

Default:

3

Range:

0-9

Unit:

.1 second

Description:

Sends break to modem

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Description:

Configures action of break signal

Command

Break from DTE

\K0

Online command mode enabled, send no break to remote modem

\K1

Break sent to remote modem and buffers cleared

\K2

Online command mode enabled, send no break to remote modem

\K3

Send break to remote modem immediately

\K4

Online command mode enabled, send no break to remote modem

\K5

Send break with transmitted data

CALL BACK DELAY TIMER

Type

Register

Format

AT [cmds] S31=n [cmds]

Default

10

Range

0-255

Unit

1 second

Description

Controls call back delay

CALLBACK NUMBER

Type

Configuration

Format

AT [cmds] @Zn=xxx [cmds]

Default

None

Description

Stores numbers to be called back during callback operation. N is a memory location from 0-9 and xxx is a combination of the number and up to 49 dial modifiers.

CALLBACK PASSWORD

Type

Configuration

Format

AT [cmds] @Wn=xxxxxxxxxx [cmds]

Default

None

Range

A-Z, a-z,0-9

Unit

ASCII string

Description

Stores callback password (n is password and xxxxxxxxxx is up to ten characters)

CALLBACK SECURITY

Type:

Configuration

Format:

AT [cmds] @An [cmds]

Description:

Modem returns call to previously stored number

Command

Function

í @A0

Callback security disabled

@A1

Callback security enabled

CALL BACK SECURITY DELAY

Type

Configuration

Format

AT [cmds] @Dn [cmds]

Default

30

Range

1-255

Unit

1 second

Description

Sets length of wait before dialing stored callback security phone number

CARRIER DETECT TIMER

Type

Register

Format

AT [cmds] S17=n [cmds]

Default

10

Range

0-255

Unit

Unidentified

Description

Unidentified

CLOSING MESSAGE

Type

Configuration

Format

AT [cmds] @Gxxx [cmds]

Default

THANK YOU! YOU WILL BE CALLED BACK!

Range

Up to 60 characters

Unit

ASCII

Description

Stores a closing message

CONNECTION PASSWORD SECURITY

Type:

Configuration

Format:

AT [cmds] @En [cmds]

Description:

Requires correct password to be included in dial command string

Command

Function

í @E0

Password security disabled

@E1

Password security enabled

COMPRESSION

Type:

Configuration

Format:

AT %Cn

Description:

Selects data compression

Command

Function

%C0

Data compression disabled

í %C1

MNP5 and V.42bis enabled

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Description:

Sets connect mode

Command

Function

\N0

Normal mode enabled

\N1

Direct mode enabled

\N2

MNP reliable mode only enabled

í \N3

V.42 and MNP modes enabled

\N4

V.42bis and V.42 modes enabled

CONNECTION PASSWORD

Type

Configuration

Format

AT [cmds] @Pxxxxxxxxx [cmds]

Default

None

Range

A-Z,a-z,0-9,*,#

Unit

ASCII string

Description

Stores password required by command string password security option of up to nine characters

CONNECTION SPEED UPPER LIMIT

Type:

Immediate

Format:

AT [cmds] %Bn [cmds]

Description:

Selects the current DCE speed.

Command

Function

í %B0

Line speed sets maximum serial port speed

%B300

300bps

%B600

600bps

%B1200

1200bps

%B2400

2400bps

%B4800

4800bps

%B7200

7200bps

%B9600

9600bps

%B12000

12.0Kbps

%B16800

16.8Kbps

%B14400

14.4Kbps

%B19200

19.2Kbps

%B21600

21.6Kbps

%B24000

24.0Kbps

%B26400

26.4Kbps

%B28800

28.8Kbps

DIAL TONE DETECT

Type:

Configuration

Format:

AT [cmds] W [cmds]

Description:

Requires a continuous three second dial tone before dialing

DISPLAY CALLBACK SETTINGS

Type:

Immediate

Format:

AT [cmds] @Vn [cmds]

Description:

Displays passwords, messages and phone numbers stored in memory

Command

Function

@V0

Display stored callback security passwords

@V1

Display stored callback security phone numbers

@V2

Display opening and closing messages

DISPLAY PASSWORDS

Type:

Immediate

Format:

AT [cmds] @Fn [cmds]

Description:

Displays callback security and remote access passwords

DTR DELAY

Type

Register

Format

AT [cmds] S25=n [cmds]

Default

5

Range

0-255

Unit

1 second

Description

Sets length of time modem ignores DTR change

DUMB MODE

Type:

Configuration

Format:

AT [cmds] @In [cmds]

Description:

Controls smart and dumb modes

Command

Function

í @I0

Smart mode

@I1

Dumb mode

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] \Qn [cmds]

Description:

Sets type of flow control used by modem

Command

Function

\Q0

Flow control disabled

\Q1

XON/XOFF flow control enabled

\Q2

CTS flow control to DTE enabled

í \Q3

RTS/CTS flow control enabled

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] \Gn [cmds]

Description:

Selects modem port flow control

Command

Function

í \G0

Flow control disabled

\G1

Flow control enabled

HANG UP DELAY

Type

Register

Format

AT [cmds] S38=n [cmds]

Default

0

Range

0-255

Unit

Unidentified

Description

Sets time before forced hang up, n=255 disables

INACTIVITY TIMER

Type:

Configuration

Format:

AT [cmds] \Tn [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

INACTIVITY TIMER

Type

Register

Format

AT [cmds] S47=n [cmds]

Default

0

Range

0-255

Unit

Unidentified

Description

Sets time modem waits before disconnecting

LEASED LINE DIALUP BACKUP TIMES

Type:

Register

Format:

AT [cmds] S13=n [cmds]

Default:

0

Range:

0-255

Unit:

Unidentified

Description:

After leased line failure, modem attempts to reconnect after specified delay

LEASED LINE DIALUP BACKUP TIMER

Type

Register

Format

AT [cmds] S15=n [cmds]

Default

5

Range

0-255

Unit

Unidentified

Description

Unidentified

LEASED LINE RETRY

Type

Configuration

Format

AT [cmds] -Bn [cmds]

Range

Unidentified

Unit

Retries

Description

Controls the number of times a leased line connection is attempted

LINE SIGNAL LEVEL

Type:

Immediate

Format:

AT [cmds] %L [cmds]

Description:

Returns received line signal level

LEASED LINE TRANSMIT LEVEL

Type

Register

Format

AT [cmds] S51=n [cmds]

Default

10

Range

0-31

Unit

Unidentified

Description

Sets leased line transmit level

LINE TYPE

Type:

Configuration

Format:

AT [cmds] @Yn [cmds]

Description:

Selects line type

Command

Function

í @Y0

Switched line operation

@Y1

Switched line operation emulates leased line operation

@Y2

Leased line with switched line backup

LOCK DCE

Type:

Configuration

Format:

AT [cmds] %Hn [cmds]

Description:

Controls DCE speed

Command

Function

%H0

DCE speed not locked

%H1

DCE speed locked

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] \Jn [cmds]

Description:

Sets operation of serial port speed

Command

Function

í \J0

Serial speed locked

\J1

Serial speed follows connect speed

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

AT [cmds] \An [cmds]

Description:

Sets the maximum transmittable block size

Command

Function

\A0

MNP block size is 64 characters

\A1

MNP block size is 128 characters

\A2

MNP block size is 192 characters

í \A3

MNP block size is 256 characters

OPENING MESSAGE

Type

Configuration

Format

AT [cmds] @Oxxx [cmds]

Default

PLEASE ENTER CALL BACK PASSWORD

Range

Up to 60 characters

Unit

ASCII string

Description

Stores an opening message

PROTOCOL

Type:

Configuration

Format:

AT [cmds] -Vn [cmds]

Description:

Controls protocol used

Command

Function

-V0

V.34 auto

-V1

V.FC auto

-V3

V.32bis auto

-V4

V.34/V.FC/V.32bis

-V5

V.34 only

-V6

V.FC only

-V7

V.32bis only

PROTOCOL

Type:

Register

Format:

AT [cmds] S54=n [cmds]

Description:

Controls protocol used

Command

Function

í S54=0

V.34 auto mode

S54=1

V.FC auto mode

S54=3

V.32bis auto mode

S54=4

V.34, V.FC and V.32bis

S54=5

V.FC and V.32bis

S54=6

V.34 only

S54=7

V.FC only

S54=8

V.32bis only

REDIAL

Type

Configuration

Format

AT [cmds] N=n [cmds]

Default

0

Range

0-15

Unit

Redials

Description

Sets number of redials attempted if busy signal received

REDIAL INTERVAL

Type

Configuration

Format

AT [cmds] N5=n [cmds]

Default

1

Range

0-255

Unit

2 seconds

Description

Controls time between redials

REDIAL LIMIT

Type

Register

Format

AT [cmds] S49=n [cmds]

Default

15

Range

Unidentified

Unit

Unidentified

Description

Sets maximum number of redials

REDIAL ORDER

Type

Configuration

Format

AT [cmds] -Z=nnn [cmds]

Unit

Phone number memory location

Description

Controls order in which stored numbers are dialed -Z? displays order

REMOTE ACCESS

Type:

Configuration

Format:

AT [cmds] *En [cmds]

Description:

Controls remote access operation

Command

Function

í *E0

Remote access disabled

*E1

Remote access enabled

REMOTE ACCESS ATTENTION CHARACTER

Type

Register

Format

AT [cmds] S41=n [cmds]

Default

42

Range

0-255

Unit

ASCII

Description

Selects the remote access attention character

REMOTE ACCESS PASSWORD

Type

Configuration

Format

AT [cmds] *Pxxxxxxxxx

Default

None

Range

Up to nine characters

Unit

ASCII printable characters

Description

Stores remote access password

REPORT SIGNAL QUALITY

Type:

Immediate

Format:

AT [cmds] %Q [cmds]

Description:

Reports signal quality

RESULT CODE FORMAT

Type:

Configuration

Format:

AT [cmds] \Vn [cmds]

Description:

Selects which result codes are displayed

Command

Function

\V0

Connect speed result codes enabled

\V1

Connect speed and V.42/MNP result codes enabled

\V2

Connect speed, V.42/MNP and data compression result codes enabled

\V3

Connect speed, V.42/MNP and data compression result codes enabled

\V4

Connect speed, V.42/MNP and data compression result codes enabled

RINGER

Type:

Configuration

Format:

AT [cmds] @Bn [cmds]

Description:

Controls ring signal passthrough to modem speaker

Command

Function

@B0

Ringer disabled

í @B1

Ringer enabled

RTS TO CTS DELAY

Type

Register

Format

AT [cmds] S26=n [cmds]

Default

0

Range

0-255

Unit

.1 second

Description

Sets delay after receipt of RTS signal until CTS forced high

SWITCHED LINE TRANSMIT LEVEL

Type

Register

Format

AT [cmds] S50=n [cmds]

Default

10

Range

0-15

Unit

Unidentified

Description

Sets switched line transmit level

SERIAL PORT

Format:

AT [cmds] S28=n [cmds]

Default:

113

Range:

0-243

Description:

Controls serial port options, parity and data bits

Bit

Value

Function

4, 3, 2, 1, 0

00000

00001

00010

00011

00100

00101

00110

00111

01000

01001

01010

01011

01100

01101

01110

01111

10000

í10001

10010

10011

Lock serial port at 75bps

Lock serial port at 110bps

Lock serial port at 300bps

Lock serial port at 600bps

Lock serial port at 1200bps

Lock serial port at 2400bps

Lock serial port at 4800bps

Lock serial port at 7200bps

Lock serial port at 9600bps

Lock serial port at 12.0Kbps

Lock serial port at 14.4Kbps

Lock serial port at 16.8Kbps

Lock serial port at 19.2Kbps

Lock serial port at 21.6Kbps

Lock serial port at 24.0Kbps

Lock serial port at 26.4Kbps

Lock serial port at 28.8Kbps

Lock serial port at 38.4Kbps

Lock serial port at 57.6Kbps

Lock serial port at 11.52Kbps

6, 5

00

01

10

í 11

Even parity

Space parity

Odd parity

No parity

7

í 0

1

8 data bits

7 data bits

SERIAL PORT SPEED

Type:

Register

Format:

AT [cmds] S52n [cmds]

Description:

Controls serial port speed

Command

Function

í S52=0

Serial port speed follows connect speed

S52=1

Lock serial port at 110bps

S52=2

Lock serial port at 300bps

S52=3

Lock serial port at 600bps

S52=4

Lock serial port at 1200bps

S52=5

Lock serial port at 2400bps

S52=6

Lock serial port at 4800bps

S52=7

Lock serial port at 7200bps

S52=8

Lock serial port at 9600bps

S52=9

Lock serial port at 12.0Kbps

S52=10

Lock serial port at 14.4Kbps

S52=11

Lock serial port at 16.8Kbps

S52=12

Lock serial port at 19.2Kbps

S52=13

Lock serial port at 21.6Kbps

S52=14

Lock serial port at 24.0Kbps

S52=15

Lock serial port at 26.4Kbps

S52=16

Lock serial port at 28.8Kbps

S52=17

Lock serial port at 38.4Kbps

S52=18

Lock serial port at 57.6Kbps

S52=19

Lock serial port at 11.52Kbps

SERVICE CLASS

Format:

AT [cmds] S33=n [cmds]

Default:

0

Range:

192

Description:

Controls MNP link and second channel

Bit

Value

Function

6

í 0

1

MNP synchronous link enabled

MNP asynchronous link enabled

7

í 0

1

Second channel disabled

Second channel enabled

TEST MODES

Format

AT [cmds] S16=n [cmds]

Default:

0

Range:

0-255

Unit:

Bit-mapped

Description:

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

Note: Bit 3 is read only

Bit

Value

Function

0

í 0

1

Local analog loopback disabled

Local analog loopback in enabled

1

í 0

1

Local digital loopback disabled

Local digital loopback in enabled

2

í 0

1

Local digital loopback disabled

Local digital loopback in enabled

3

í 0

1

Modem not in remote digital loopback

Remote digital loopback in progress

4

í 0

1

Remote digital loopback disabled

Remote digital loopback enabled

5

í 0

1

Remote digital loopback w/ self-test disabled

Remote digital loopback w/ self-test enabled

6

í 0

1

Local analog loopback enabled

Local analog loopback disabled

7

í 0

1

Remote digital loopback enabled

Remote digital loopback disabled

V.25bis MODES

Type:

Configuration

Format:

AT [cmds] *Cn [cmds]

Description:

Selects type of V.25bis operation

Command

Function

*C0

V.25bis disabled

*C1

V.25bis asynchronous enabled

*C2

V.25bis bi-synchronous enabled

*C3

V.25bis HDLC enabled

V.42bis MAXIMUM STRING LENGTH

Type:

Register

Format:

AT [cmds] S42=n [cmds]

Default:

16

Range:

0-255

Unit:

Unidentified

Description:

Selects string size for V.42bis compression

WAIT FOR CONNECTION PASSWORD

Type

Register

Format

AT [cmds] S48=n [cmds]

Default

15

Range

0-255

Unit

1 second

Description

Sets length of wait for connection password after connection

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] \Xn [cmds]

Description:

Selects whether XON/XOFF signals are sent to remote modem

Command

Function

í \X0

XON/XOFF signals trapped by local modem

\X1

XON/XOFF passed through local modem

S REGISTERS

Register

Default

Function

S49

15

Redial limit

S50

10

Switched line transmit level

S51

10

Leased line transmit level