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PC288MX (REV. 2)

E-TECH RESEARCH, INC.

PC288MX (REV. 2)

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

8-bit ISA

Fax Class

Class I

Data Modulation Protocol

Bell 103A/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

Line in

CN2

BASE I/O ADDRESS SELECTION

Port

SW1/1

SW1/2

SW1/3

SW1/5

COM1: (3F8h)

On

Off

On

Off

COM2: (2F8h)

On

Off

Off

On

COM3: (3E8h)

Off

On

On

Off

COM4: (2E8h)

Off

On

Off

On

INTERRUPT SELECTION

IRQ

SW1/4

SW1/6

SW1/7

SW1/8

2

Off

Off

Off

On

3

Off

On

Off

Off

4

On

Off

Off

Off

5

Off

Off

On

Off

Proprietary AT Command Set

AUTO FALLBACK CHARACTER

Type:

Register

Format:

AT [cmds] S43=n [cmds]

Example:

AT S43=13 <CR>

Description:

Set auto fallback character during MNP negotiation. (%An)

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.

Command

Function

%G0

Fallback disabled.

%G1

Fallback enabled.

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Configuration

Format:

AT [cmds] %An [cmds]

Example:

AT%A20<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 \C1 &W<CR>

Description:

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

Command

Function

\CO

Data is discarded.

\C1

Data is buffered.

\C2

Data is discarded, sets to normal mode and sends auto-reliable character to serial port.

AUTO-RETRAIN

Type:

Configuration

Format:

AT %En

Example:

AT %E1 <CR>

Description:

Selects auto-retrain mode.

Command

Function

%E0

Auto-retrain disabled.

%E1

Auto-retrain enabled.

%E2

Do not hang up and auto-retrain disabled.

AUTO SLEEP TIMER

Format

AT [cmds] S46=n [cmds]

Example:

AT S46= 100<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. 255 = disable.

BIT-MAPPED REGISTER S14

Format

AT [cmds] S14? [cmds]

Example:

ATS14?<CR>

Default:

Read only

Range:

0-174

Unit:

Bit-mapped.

Description:

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

Bit

Value

Meaning

0

0

Not used.

1

0

1

Command echo disabled.

Command echo enabled.

2

0

1

Result codes enabled.

Result codes disabled.

3

0

1

Display result codes in numeric format.

Display result codes in verbose format.

4

0

Not used.

5

0

1

Tone dial enabled.

Pulse dial enabled.

6

0

Not used.

7

0

1

Answer mode enabled.

Originate mode enabled.

BIT-MAPPED REGISTER S21

Format

AT [cmds] S21? [cmds]

Example:

ATS21?<CR>

Default:

Read only

Range:

0 - 124

Unit:

Bit-mapped.

Description:

Controls CTS, low DTR action, and DCD signal.

Bit

Value

Meaning

1, 0

00

Not used.

2

0

1

CTS follows RTS. Synchronous modes only.

CTS forced high.

4, 3

00

01

10

11

DTR signal ignored.

Modem goes to command mode on low DTR.

Modem disconnects on low DTR. Auto-Answer is disabled.

Modem is initialized on low DTR.

5

0

1

DCD forced high.

DCD normal.

6

0

1

DSR forced high.

DSR normal.

BIT-MAPPED REGISTER S22

Format

AT [cmds] S22? [cmds]

Example:

ATS22?<CR>

Default:

Read only

Range:

0 - 255

Unit:

Bit-mapped.

Description:

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

Bit

Value

Meaning

1, 0

00

01

10

11

Lowest volume setting.

Low volume setting.

Medium volume setting

Highest volume setting.

3, 2

00

01

10

11

Speaker disabled.

Speaker enabled until carrier signal detected

Speaker enabled.

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

6, 5 ,4

000

100

101

110

111

Busy and dialtone detection disabled.

Busy and dialtone detection disabled.

Busy tone detection disabled, dialtone detection enabled.

Busy tone detection enabled, dialtone detection disabled.

Busy and dialtone detection enabled.

7

0

1

Pulse dialing at 39/61ms at 10pps.

Pulse dialing at 33/67ms at 10pps.

BIT-MAPPED REGISTER S23

Format

AT [cmds] S23? [cmds]

Example:

ATS23?<CR>

Default:

Read only

Range:

0-241

Unit:

Bit-mapped.

Description:

Grants/denies remote digital loopback, controls parity, and sets guard tone.

Bit

Value

Meaning

0

0

1

Remote digital loopback denied.

Remote digital loopback allowed.

3, 2, 1

000

Not used.

5,4

00

01

10

11

Parity even.

Parity Space.

Parity odd.

Parity Mark.

7, 6

00

01

10

Guard tone disabled.

Guard tone 550Hz enabled.

Guard tone 1800Hz enabled.

BIT-MAPPED REGISTER S27

Format

AT [cmds] S27? [cmds]

Example:

AT S27? <CR>

Default:

Read only

Range:

0 - 127

Unit:

Bit-mapped.

Description:

Selects sync/async mode, Line type, internal clock, and ITU-T/Bell modes.

Bit

Value

Function

3, 1, 0

000

001

010

011

100

Asynchronous mode, serial port speed follows connect speed.

Asynchronous command mode and synchronous connect mode.

Asynchronous command mode and synchronous connect mode, DTR dialing enabled.

Asynchronous command mode on low DTR, synchronous connect mode on high DTR.

Hayes AutoSync™ mode - serial port locked at 9600bps.

2

0

1

Dial up line.

Leased line.

5, 4

00

01

10

Internal DTE transmit clock source.

External DTE transmit clock source.

Slave DTE transmit clock source.

6

0

1

CCITT mode.

Bell mode.

BIT-MAPPED REGISTER S44

Format

AT [cmds] S44? [cmds]

Example:

AT S44? <CR>

Default:

Read only.

Range:

0-23

Unit:

Bit-mapped.

Description:

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

Bit

Value

Meaning

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.

BIT-MAPPED REGISTER S51

Format

AT [cmds] S51? [cmds]

Example:

AT S51? <CR>

Default:

Read only.

Range:

0 - 115

Unit:

Bit-mapped.

Description:

Display flow control.

Bit

Value

Meaning

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? [cmds]

Example:

AT S54? <CR>

Default:

Read only.

Range:

0 - 131

Unit:

Bit-mapped

Description:

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

Bit

Value

Meaning

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 \B3 &W<CR>

Range:

1-9

Unit:

100 ms.

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

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 DTE.

\K1

Buffers cleared and break sent to remote modem.

Send break to remote modem immediately.

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 DTE immediately.

\K3

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.

Break sent with received data to the DTE.

\K5

Send break with transmitted data.

Send break to remote modem immediately.

Break sent with received data to the DTE.

COMPRESSION

Type:

Configuration

Format:

AT %Cn

Example:

AT *EC0 %C1 *AP0<CR>

Description:

Selects data compression.

Command

Function

%C0

Data compression disabled.

%C1

MNP 5 enabled.

%C2

V.42bis enabled.

%C3

MNP 5 and V.42bis enabled.

COMPRESSION

Type:

Configuration

Format:

AT $Cn

Example:

AT *EC0 $C1 *AP0<CR>

Description:

Selects data compression.

Command

Function

$C0

Data compression disabled.

$C1

Data compression enabled.

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Example:

AT \N1 DT555-1212<CR>

Description:

Sets connect mode.

Command

Function

\N0

Normal mode enabled.

\N1

Direct mode enabled.

\N2

MNP mode only enabled.

\N3

LAP-M mode with fallback to MNP and normal modes enabled.

\N4

LAP-M mode with fallback to MNP enabled.

\N5

LAP-M mode only enabled.

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] $En [cmds]

Example:

AT $E1 DT555-1212<CR>

Description:

Sets connect mode.

Command

Function

$E0

Normal mode enabled.

$E1

MNP mode with fallback to normal mode enabled.

$E2

MNP mode only enabled.

$E3

LAP-M mode with fallback to MNP and normal modes enabled.

$E4

LAP-M mode only enabled.

DISPLAY AUTO-RELIABLE BUFFER

Type:

Register

Format:

AT [cmds] S48? [cmds]

Example:

AT S48? <CR>

Default:

Read only.

Description:

Displays auto-reliable buffer settings. (\Cn)

Value

Meaning

0

Data is discarded.

1

Data is buffered.

2

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

DISPLAY CONNECT MESSAGE

Type:

Register

Format

AT [cmds] S41? [cmds]

Example:

AT S41? <CR>

Default:

Read only.

Description:

Connect message display. (Wn)

Value

Meaning

0

Connect with DTE speed.

1

Connect with carrier, protocol, and compression.

2

Connect with DCE speed.

DISPLAY FAX/DATA MODE

Type:

Register

Format:

AT [cmds] S50? [cmds]

Example:

AT S50?<CR>

Default:

Read only.

Description:

Displays data or FAX mode.

Value

Meaning

0

Data mode enabled.

1

FAX mode enabled.

DISPLAY FLOW CONTROL TYPE

Type:

Register

Format:

AT [cmds] S52?[cmds]

Example:

AT S52?<CR>

Default:

Read only.

Description:

Displays type of flow control used by modem. (&Kn)

Value

Meaning

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.

DISPLAY MAXIMUM BLOCK SIZE

Type:

Register

Format:

AT [cmds] S49? [cmds]

Example:

AT S49?<CR>

Default:

Read only.

Description:

Displays maximum block size. (\An)

Value

Meaning

63

Maximum MNP block size is 64 characters.

127

Maximum MNP block size is 128 characters.

191

Maximum MNP block size is 192 characters.

255

Maximum MNP block size is 256 characters.

31

Maximum MNP block size is 32 characters.

DISPLAY MODEM OPERATING MODE

Type:

Register

Format:

AT [cmds] S53? [cmds]

Example:

AT S53? <CR>

Default:

Read only.

Description:

Displays connect mode. (\Nn)

Value

Meaning

0

Normal mode enabled.

1

Direct mode enabled.

2

MNP reliable mode enabled.

4

LAP-M mode enabled.

6

LAP-M mode with fallback to MNP enabled.

7

LAP-M, MNP, or Normal mode enabled.

DISPLAY MNP OPTIONS

Format

AT [cmds] S59? [cmds]

Example:

AT S59?<CR>

Default:

Read only.

Description:

Displays MNP5 status. (%Cn)

Value

Meaning

0

Data compression disabled.

1

MNP 5 enabled.

2

V.42bis enabled.

3

MNP 5 and V.42bis enabled.

DISPLAY PROTOCOL - V.42 DETECTION

Format

AT [cmds] S40? [cmds]

Example:

AT S40? <CR>

Default:

Read-only

Range:

0-65

Unit:

Bit-mapped.

Description:

Controls active protocols and V.42 detection. (Nn and -Jn)

Bit

Value

Meaning

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.32terbo, V.32bis, V.32, V.22bis, V.22 or Bell 212, V.21, and Bell 103

5 - 1

0

Not used.

6

0

1

V.42 detection disabled.

V.42 detection enabled.

DISPLAY V.32 RETRAIN

Type:

Register

Format:

AT [cmds] S42?[cmds]

Example:

AT S42? <CR>

Default:

Read only.

Description:

Selects action the modem will take during bad line quality on V.32/32bis connection. (%En)

Value

Meaning

0

Auto-retrain disabled, hang up.

1

Auto-retrain on line quality problem enabled.

2

Modem ignores line quality problems.

DTE RATE STATUS

Type:

Register

Format:

AT [cmds] S62? [cmds]

Example:

AT S62? <CR>

Default:

Read only.

Description:

Displays DTE rate.

Value

Meaning

0

300 bps.

1

600 bps.

2

1200 bps.

3

2400 bps.

4

4800 bps.

5

7200 bps.

6

9600 bps.

7

12Kbps.

8

14.4Kbps.

9

16.8Kbps.

10

19.2Kbps.

11

21.6Kbps.

12

24Kbps.

13

26.4Kbps.

14

28.8Kbps.

15

38.4Kbps.

16

57.6Kbps.

17

115.2Kbps.

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] \Gn [cmds]

Example:

AT \G1 &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:

Configuration

Format:

AT [cmds] $Fn [cmds]

Example:

AT &G1 $F3 <CR>

Description:

Sets type of flow control used by modem.

Command

Function

$F0

XON/XOFF flow control enabled.

$F1

XON/XOFF pass-through flow control enabled.

$F4

CTS/RTS flow control enabled.

$F5

Flow control disabled.

INACTIVITY TIMER

Type:

Configuration

Format:

AT [cmds] \Tn [cmds]

Example:

AT\T20<CR>

Default:

0

Range:

1-90

Unit:

1 minute.

Description:

Sets the length of time that the modem does not receive information before it disconnects. \T0 disables the timer.

LOCAL SERIAL PORT SPEED

Type:

Configuration

Format:

AT [cmds] S72=n [cmds]

Example:

AT S72=00 *OS0 *SC1<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 %L3 %B14 \J0<CR>

Description:

Sets operation of serial port speed.

Command

Function

\J0

Serial speed locked.

\J1

Serial speed follows connect speed.

LOOPBACK TESTS

Format

AT [cmds] S16=n [cmds]

Example:

ATS16=32<CR>

Default:

0

Range:

0 - 125

Unit:

Bit-mapped.

Description:

Enables loopback tests.

Bit

Value

Function

0

0

1

Local analog loopback test disabled.

Local analog loopback test enabled.

1

0

Not used.

2

0

1

Local digital loopback test disabled.

Local digital loopback test enabled.

3

0

1

Modem is not performing remote digital loopback test.

Modem is performing remote digital loopback test.

4

0

1

Remote digital loopback test disabled.

Remote digital loopback test enabled.

5

0

1

Remote digital loopback with local self-test disabled.

Remote digital loopback with local self-test enabled.

6

0

1

Local analog loopback with local self-test disabled.

Local analog loopback with local self-test enabled.

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

AT [cmds] \An [cmds]

Example:

AT \A3 &MB28800<CR>

Description:

Sets the maximum transmittable block size.

Command

Function

\A0

Maximum MNP block size is 64 characters.

\A1

Maximum MNP block size is 128 characters.

\A2

Maximum MNP block size is 192 characters.

\A3

Maximum MNP block size is 256 characters.

\A4

Maximum MNP block size is 32 characters.

PROTOCOL RESULT CODE

Type:

Configuration

Format:

AT [cmds] \Vn [cmds]

Example:

AT \V0 Q0 <CR>

Description:

\V responds when conjunction with W0 and W2 commands.

Command

Function

\V1

Protocol result code disabled.

\V0

Protocol result code enabled.

PROTOCOL/SPEED

Type:

Register

Format:

AT [cmds] S37n [cmds]

Example:

AT S37=00 <CR>

Description:

Selects the current DCE speed.

Value

Meaning

S37=0

Select last ATspeed.

S37=3

Select 300bps speed.

S37=5

Select 1200bps speed.

S37=6

Select 2400bps speed.

S37=7

Select 4800bps speed.

S37=8

Select 7200bps speed.

S37=9

Select 9600bps speed.

S37=10

Select 12Kbps speed.

S37=11

Select 14.4Kbps speed.

S37=12

Select 16.8Kbps speed.

S37=13

Select 19.2Kbps speed.

S37=14

Select 21.6Kbps speed.

S37=15

Select 24Kbps speed.

S37=16

Select 26.4Kbps speed.

S37=17

Select 28.8Kbps speed.

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 3-digit ROM checksum result.

I2

Reports OK.

I3

Reports firmware version.

I4

Reports OEM string.

I5

Reports country code.

I9

Reports checksum result of Flash-ROM.

ROUND TRIP DELAY

Type:

Register

Format:

AT [cmds] S65? [cmds]

Example:

AT S65? <CR>

Default:

Read only.

Units:

.1 second.

Description:

Displays the round trip delay.

V.42 DETECTION PHASE

Type:

Configuration

Format:

AT [cmds] -Jn [cmds]

Example:

AT -J1 &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 "H3 &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 DICTIONARY SIZE

Type:

Configuration

Format:

AT [cmds] "Nn [cmds]

Example:

AT "N2 &W<CR>

Description:

Controls V.42 dictionary size.

Command

Function

"N0

512 bytes.

"N1

1024 bytes.

"N2

1536 bytes.

V.42bis DICTIONARY SIZE

Type:

Register

Format:

AT [cmds] S57? [cmds]

Example:

AT S57? <CR>

Default:

Read only.

Description:

Displays V.42bis dictionary size. ("Nn)

Value

Meaning

0

512 bytes.

1

1024 bytes.

2

1536 bytes.

V.42bis MAXIMUM STRING LENGTH

Type:

Immediate

Format:

AT [cmds] "On [cmds]

Example:

AT "O32 <CR>

Default:

32

Range:

6 - 64

Unit:

Unidentified.

Description:

Selects string size for V.42bis compression.

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] \Xn [cmds]

Example:

AT \X7 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.