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2834A

ARCHTEK AMERICA CORPORATION

2834A

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

External

Fax Class

Class I & II

Data Modulation Protocol

Bell 103J/212A

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

AT&T V.32terbo

Fax Modulation Protocol

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

Error Correction/Compression

MNP5, V.42, V.42bis

CONNECTIONS

Purpose

Location

Purpose

Location

Line out

CN1

AC power

CN4

Line in

CN2

Power switch

SW1

RS-232/422

CN3

   

Proprietary AT Command Set

AUTO FALLBACK CHARACTER

Type:

Register

Format:

AT [cmds] S43=n [cmds]

Example:

AT S43=13 <CR>

Default:

13

Range:

0 - 127

Unit:

ASCII

Description:

Set auto fallback character during MNP negotiation.

Notes

S43=0, disabled. S43=(1 - 127), enabled.

AUTO FALL FORWARD/FALLBACK

Type:

Configuration

Format:

AT [cmds] %Gn [cmds]

Example:

AT %G &W <CR>

Description:

Selects auto fallback in V.22bis and V.32 only.

Command

Function

%G0

Fallback disabled.

%G1

Fallback enabled.

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Configuration

Format:

AT [cmds] %An [cmds]

Example:

AT%A0<CR>

Default:

13

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]

Example:

AT \C0 &W<CR>

Description:

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

Command

Function

\C0

Data is discarded.

\C1

Data is buffered.

\C2

Data is discarded, modem returns to normal mode on receiving auto-reliable fallback character.

AUTO-RETRAIN

Type:

Configuration

Format:

AT [cmds] %En [cmds]

Example:

AT %E0 <CR>

Description:

Selects auto-retrain mode.

Command

Function

%E0

Auto-retrain disabled.

%E1

Auto-retrain enabled.

AUTO SLEEP TIMER

Format

AT [cmds] S46=n [cmds]

Example:

AT S46= 255<CR>

Default:

255

Range:

0 - 255

Unit:

.1 second

Description:

Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode.

BIT-MAPPED REGISTER S14

Format

AT [cmds] S14? [cmds]

Example:

ATS14?<CR>

Default:

Read only

Range:

0 - 255

Unit:

Bit-mapped

Description:

Controls echo, quiet mode, result codes, dial mode, and originate/answer mode.

Bit

Value

Meaning

0

0

Not used.

1

0

1

Command echo function disabled.

Command echo function enabled.

2

0

1

Result code sending disabled.

Result code sending enabled.

3

0

1

Numeric format enabled.

Verbose format enabled.

4

0

Not used.

5

0

1

Tone dialing mode enabled.

Pulse dialing mode enabled.

6

0

1

Result codes normal.

Result codes disabled in answer mode.

7

0

1

Answer mode enabled.

Originate mode enabled.

BIT-MAPPED REGISTER S40

Format

AT [cmds] S40=n [cmds]

Example:

AT S40=77 <CR>

Default:

77

Range:

0 - 127

Unit:

Bit-mapped

Description:

Controls active protocols and V.42 detection.

Bit

Value

Function

0

0

1

Automatic mode-detection disabled

In originate mode, handshake begins at line speed designated by the S37 register. Modem can shift to a slower speed if necessary.

In answer mode, handshake attempted with the following protocols in order - V.FC, V.32bis, V.32, V.22bis, V.22 or Bell 212, V.21, and Bell 103

5 - 1

00110

Not used.

6

0

1

V.42 detection disabled.

V.42 detection enabled.

BIT-MAPPED REGISTER S44

Format

AT [cmds] S44=n [cmds]

Example:

AT S44=7 <CR>

Default:

7

Range:

0 - 23

Unit:

Bit-mapped

Description:

Selects V.42 status, V.42bis, and fallback.

Bit

Value

Function

0

0

1

V.42bis status disabled.

V.42bis status enabled.

2, 1

00

01

10

11

V.42bis disabled.

V.42bis when transmitting enabled.

V.42bis when receiving enabled.

V.42bis when transmitting/receiving enabled.

3

0

Not used.

4

0

1

Fallback disabled.

Fallback enabled.

7, 6, 5

0

Not used.

BIT-MAPPED REGISTER S49

Type:

Register

Format:

AT [cmds] S49=n [cmds]

Example:

AT S49=255<CR>

Description:

Set maximum block size.

Command

Function

S49=64

Maximum MNP block size is 64 characters.

S49=127

Maximum MNP block size is 127 characters.

S49=191

Maximum MNP block size is 191 characters.

S49=255

Maximum MNP block size is 255 characters.

BIT-MAPPED REGISTER S51

Format

AT [cmds] S51=n [cmds]

Example:

AT S51=40 <CR>

Default:

3

Range:

0 - 115

Unit:

Bit-mapped

Description:

selects flow control,

Bit

Value

Function

2, 1, 0

000

001

010

011

Flow control disabled.

XON/XOFF flow control enabled.

CTS flow control to DTE enabled.

RTS/CTS flow control enabled.

3

0

Not used.

4

0

1

Flow control disabled.

Flow control to XON/XOFF flow enabled.

5

0

1

Serial speed locked.

Serial speed follows connect speed.

7, 6

00

01

XON/XOFF signals trapped by local modem.

XON/XOFF passed through local modem.

BIT-MAPPED REGISTER S54

Format

AT [cmds] S54=n [cmds]

Example:

AT S54=69 <CR>

Default:

0

Range:

0 - 131

Unit:

Bit-mapped

Description:

Selects the communication protocol for data calls, and protocol result code.

Bit

Value

Function

0

0

1

B2 is enabled.

B2 is not enabled.

1

0

1

B3 is enabled

B3 is not enabled.

6 - 2

0

Not used.

7

0

1

Protocol result code disabled.

Protocol result code enabled.

BREAK SEND

Type:

Configuration

Format:

AT [cmds] \Bn [cmds]

Example:

AT \B0 &W<CR>

Default:

0

Range:

1-9

Unit:

.1 second

Description:

Sends break to modem.

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Example:

AT \K1 <CR>

Description:

Configures action of break signal.

Command

Break from DTE

Reliable/Normal mode

Break from DTE

Direct mode

Modem receives \B

Break from remote modem

\K0

Enter command mode, do not send break to remote modem.

Send break to remote modem immediately, then enter command mode.

Buffers cleared and break sent to remote modem.

Buffers cleared and break sent to DTE.

\K1

Buffers cleared and break sent to remote modem.

Send break to remote modem immediately.

Buffers cleared and break sent to remote modem.

Buffers cleared and break sent to DTE.

\K2

Enter command mode, do not send break to remote modem.

Send break to remote modem immediately, then enter command mode.

Send break to remote modem immediately.

Send break to DTE immediately.

\K3

Send break to remote modem immediately.

Send break to remote modem immediately.

Send break to remote modem immediately.

Send break to DTE immediately.

\K4

Enter command mode, do not send break to remote modem.

Send break to remote modem immediately, then enter command mode.

Send break to remote modem with transmitted data.

Break sent with received data to the DTE.

\K5

Send break with transmitted data.

Send break to remote modem immediately.

Send break to remote modem with transmitted data.

Break sent with received data to the DTE.

BTLZ STRING LENGTH

Type:

Register

Format:

AT [cmds] S58=n [cmds]

Example:

AT S58=32 <CR>

Default:

32

Range:

6 - 64

Unit:

Unidentified

Description:

Selects BTLZ string length.

CALLING TONE

Type:

Configuration

Format:

AT [cmds] -Cn [cmds]

Example:

AT -C0 &W<CR>

Description:

Controls whether the DTE will allow the modem to send a 1300Hz calling tone when originating.

Command

Function

-C0

Disable calling tone.

-C1

Enable calling tone.

COMPRESSION

Type:

Configuration

Format:

AT [cmds] %Cn [cmds]

Example:

AT %C0 <CR>

Description:

Selects data compression.

Command

Function

%C0

Data compression disabled.

%C1

Data compression enabled.

CONNECT MESSAGE

Type:

Configuration

Format:

AT [cmds] S41=n [cmds]

Example:

AT S41=0<CR>

Description:

Controls CONNECT message.

Command

Function

S41=0

CONNECT with DTE speed.

S41=1

CONNECT with carrier, protocol, and compression.

S41=2

CONNECT with DCE speed.

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Example:

AT \N0 DT555-1212<CR>

Description:

Sets connect mode.

Command

Function

\N0

Normal mode enabled.

\N1

Direct mode enabled.

\N2

Reliable mode enabled.

\N3

Auto-reliable mode enabled.

\N4

LAPM mode enabled.

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] \Vn [cmds]

Example:

AT \V1 %C1<CR>

Description:

Selects extended result codes.

Command

Function

\V0

Extended result codes disabled.

\V1

Extended result codes enabled.

FAX/DATA MODE

Type:

Register

Format:

AT [cmds] S50=n [cmds]

Example:

AT S50=0 &W<CR>

Description:

Choose data or FAX mode.

Command

Function

S50=0

Data mode enabled.

S50=1

FAX mode enabled.

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] \Gn [cmds]

Example:

AT \G0 &K3<CR>

Description:

Selects modem port flow control.

Command

Function

\G0

Flow control disabled.

\G1

Flow control enabled.

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] \Qn [cmds]

Example:

AT \Q0 A <CR>

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.

\Q3

RTS/CTS flow control enabled.

FLOW CONTROL TYPE

Type:

Register

Format:

AT [cmds] S52=n [cmds]

Example:

AT &G1 S52=0 <CR>

Description:

Sets type of flow control used by modem.

Command

Function

S52=0

Flow control disabled.

S52=1

Not used.

S52=2

Not used.

S52=3

CTS/RTS flow control enabled.

S52=4

XON/XOFF pass-through flow control enabled.

INACTIVITY TIMER

Type:

Configuration

Format:

AT [cmds] \Tn [cmds]

Example:

AT\T20<CR>

Default:

0

Range:

0-90

Unit:

1 minute

Description:

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

LOCAL SERIAL PORT SPEED

Type:

Register

Format:

AT [cmds] S72=n [cmds]

Example:

AT S72=0<CR>

Description:

Sets serial port speed.

Command

Function

S72=0

Sets speed automatically.

S72=1

Sets 300bps speed.

S72=2

Sets 600bps speed.

S72=3

Sets 1200bps speed.

S72=4

Sets 2400bps speed.

S72=5

Sets 4800bps speed.

S72=6

Sets 7200bps speed.

S72=7

Sets 9600bps speed.

S72=8

Sets 12Kbps speed.

S72=9

Sets 14.4Kbps speed.

S72=10

Sets 16.8Kbps speed.

S72=11

Sets 19.2Kbps speed.

S72=12

Sets 21.6Kbps speed.

S72=13

Sets 24Kbps speed.

S72=14

Sets 26.4Kbps speed.

S72=15

Sets 28.8Kbps speed.

S72=16

Sets 38.4Kbps speed.

S72=17

Sets 57.6Kbps speed.

S72=18

Sets 115.2Kbps speed.

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] \Jn [cmds]

Example:

AT \J0<CR>

Description:

Sets operation of serial port speed.

Command

Function

\J0

Serial speed locked.

\J1

Serial speed follows connect speed.

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

AT [cmds] \An [cmds]

Example:

AT \A3 %C1<CR>

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.

\A3

MNP block size is 256 characters.

MODEM OPERATING MODE

Type:

Register

Format:

AT [cmds] S53=n [cmds]

Example:

AT S53=3 <CR>

Description:

Sets connect mode.

Command

Function

S53=0

Normal mode enabled.

S53=1

Direct mode enabled.

S53=2

MNP reliable mode enabled.

S53=3

Auto-reliable mode enabled.

S53=4

LAPM reliable mode enabled.

MNP OPTIONS

Type:

Register

Format:

AT [cmds] S59=n [cmds]

Example:

AT S59=0 <CR>

Description:

Selects MNP5 status.

Command

Function

S59=0

Data compression disabled.

S59=1

Data compression enabled.

MNP STREAM/BLOCK MODE

Type:

Configuration

Format:

AT [cmds] \Ln [cmds]

Example:

AT \L1 DT555-1212<CR>

Description:

Selects the transfer mode for MNP.

Command

Function

\L0

Stream mode for MNP enabled.

V.32 AUTO-RETRAIN

Type:

Register

Format:

AT [cmds] S42=n [cmds]

Example:

AT S42=0 &W<CR>

Description:

Controls V.32 Auto-retrain.

Command

Function

S42=0

Auto-retrain disabled, hang up.

S42=1

Auto-retrain on line quality problem enabled.

S42=2

Modem ignores line quality problems.

V.42 DETECTION PHASE

Type:

Configuration

Format:

AT [cmds] -Jn [cmds]

Example:

AT -J0 &W<CR>

Description:

Controls V.42 detection.

Command

Function

-J0

V.42 detection disabled.

-J1

V.42 detection enabled.

V.42bis COMPRESSION CONTROL

Type:

Configuration

Format:

AT [cmds] "Hn [cmds]

Example:

AT "H0 &W<CR>

Description:

Controls V.42bis data compression

Command

Function

"H0

V.42bis disabled.

"H1

V.42bis when transmitting enabled.

"H2

V.42bis when receiving enabled.

"H3

V.42bis when transmitting/receiving enabled.

V.42bis MAXIMUM STRING LENGTH

Type:

Immediate

Format:

AT [cmds] "On [cmds]

Example:

AT "O32 <CR>

Default:

32

Range:

6 - 250

Unit:

ASCII character

Description:

Selects string size for V.42bis compression.

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] \Xn [cmds]

Example:

AT \X0 O<CR>

Description:

Selects whether XON/XOFF signals are sent to remote modem.

Command

Function

\X0

XON/XOFF signals trapped by local modem.

\X1

XON/XOFF passed through local modem.