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E288MX (REV. 1.1)

E-TECH RESEARCH, INC.

E288MX (REV. 1.1)

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 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

DC power

CN4

Line in

CN2

Volume

R1

RS-232/422

CN3

Power switch

SW1

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

TD

Red

On

DTE is transmitting data

TD

Red

Off

DTE is not transmitting data

RD

Red

On

Modem is receiving data

RD

Red

Off

Modem is not receiving data

DTR

Red

On

DTR signal is high

DTR

Red

Off

DTR signal is low

CTS

Red

On

CTS signal is high

CTS

Red

Off

CTS signal is low

DCD

Red

On

Carrier signal detected

DCD

Red

Off

Carrier signal not detected

OH

Red

On

Modem is off-hook

OH

Red

Off

Modem is on-hook

AA

Red

On

Auto-answer enabled

AA

Red

Off

Auto-answer disabled

AA

Red

Blinking

Phone is ringing

LL

Red

On

Operating in lease-line mode

LL

Red

Off

Not operating in Lease-line mode

PWR

Red

On

Power is on

PWR

Red

Off

Power is off

JUMPER SELECTION

Function

JP6

JP7

JP8

JP9

Switched

Open

Not used

Not used

Closed

Lease Line - originating

Closed

Open

Closed

Open

Lease Line - answering

Closed

Closed

Closed

Open

Proprietary AT Command Set

AUTO FALL FORWARD/FALLBACK

Type:

Configuration

Format:

AT [cmds] %Gn [cmds]

Example:

AT %G1 &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 SLEEP TIMER

Type:

Register

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.

BREAK SEND

Type:

Configuration

Format:

AT [cmds] \Bn [cmds]

Example:

AT \B3 &W<CR>

Range:

0 - 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

In normal or reliable mode, break from DTE

In direct mode, break from DTE

Break received from remote modem

\K0

Online command mode enabled, send no break to remote modem.

Send break immediately and enter command state.

Buffers cleared, break sent to remote modem.

\K1

Break sent to remote modem and buffered cleared.

Send break to remote modem immediately.

Buffers cleared, break sent to remote modem.

\K2

Online command mode enabled, send no break to remote modem.

Send break immediately and enter command state.

Break sent immediately to DTE.

\K3

Send break to remote modem immediately.

Send break to remote modem immediately.

Break sent immediately to DTE.

\K4

Online command mode enabled, send no break to remote modem.

Send break immediately and enter command state.

Break sent to remote modem when data received.

\K5

Send break with transmitted data.

Send break to remote modem immediately.

Break sent to remote modem when data received.

COMMAND SET

Type:

Configuration

Format:

AT [cmds] %Vn [cmds]

Example:

AT %V0 &W<CR>

Description:

Selects V.25bis or AT command sets.

Command

Function

» %V0

AT command set enabled.

%V1

V.25bis command set enabled.

COMPRESSION

Type:

Configuration

Format:

AT %Cn

Example:

AT *EC0 %C3 *AP0<CR>

Description:

Contols data compression.

Command

Function

%C0

Data compression disabled.

%C1

MNP 5 enabled.

%C2

V.42bis enabled.

» %C3

MNP 5 and V.42bis enabled.

DATA COMPRESSION CONTROL

Type:

Configuration

Format:

AT [cmds] $Cn [cmds]

Example:

AT $C1 &W<CR>

Description:

Controls data compression.

Command

Function

$C0

Data compression disabled.

» $C1

MNP 5 and V.42bis enabled.

DIAL STORE NUMBER

Type:

Configuration

Format:

AT [cmds] DSn [cmds]

Example:

AT DS1 &W<CR>

Description:

Dial stored number

Note: n = 0 - 3, only three phone numbers can be in the nonvolatile memory.

DTE RATE STATUS

Type:

Register

Format:

AT [cmds] S62=n [cmds]

Example:

AT S62=16 <CR>

Description:

Selects DTE rate.

Command

Function

0

300bps.

1

600bps.

2

1200bps.

3

2400bps.

4

4800bps.

5

7200bps.

6

9600bps.

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.

DTE SPEED OPTION

Type:

Configuration

Format:

AT [cmds] \Jn [cmds]

Example:

AT \J0 &W<CR>

Description:

Controls the speed of the DTE.

Command

Function

» \J0

DCE and DTE rates are independent.

\J1

DTE rate adjusts to DCE rate after connection.

ERROR CORRECTION CONTROL

Type:

Configuration

Format:

AT [cmds] $En [cmds]

Example:

AT $E3 &W<CR>

Description:

Selects error correction mode.

Command

Function

$E0

Normal mode.

$E1

MNP auto-reliable mode.

$E2

MNP reliable mode.

» $E3

LAPM, MNP, or normal reliable mode.

$E4

LAPM mode reliable mode only.

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

» 0

Data mode enabled.

1

FAX mode enabled.

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:

Configuration

Format:

AT [cmds] $Fn [cmds]

Example:

AT $F4 A<CR>

Description:

Select flow control used by modem.

Command

Function

$F0

XON/XOFF software flow control enabled.

$F1

XON/XOFF pass-through flow control enabled.

$F4

Hardware CTS/RTS flow control enabled.

$F5

Flow control disabled.

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] \Qn [cmds]

Example:

AT \Q2<CR>

Description:

Sets type of flow control used by modem.

Command

Function

\Q0

Flow control disabled.

\Q1

XON/XOFF software flow control enabled.

\Q2

CTS flow control by DCE enabled.

» \Q3

CTS/RTS hardware flow control enabled.

IDENTIFICATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Example:

AT I3 &W<CR>

Description:

Displays several options.

Command

Function

I0

Display product - identification code.

I2

Display ROM checksum.

I3

Display firmware version.

I4

Display OEM string.

I5

Display country code.

I9

Display ROM checksum.

INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] \Tn [cmds]

Example:

AT\T20<CR>

Default:

Unidentified.

Range:

1-90

Unit:

1 minute

Description:

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

Note:

\T0 will disable inactivity timer.

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

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.

MODEM PROTOCOL

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 reliable mode enabled.

» \N3

MNP, LAP-M, or normal mode enabled.

\N4

LAP-M or MNP reliable enabled.

\N5

LAP-M reliable mode enabled.

POOR SIGNAL QUALITY REACTION

Type:

Configuration

Format:

AT [cmds] %En [cmds]

Example:

AT %E0<CR>

Description:

Configures the modem’s reaction to poor signal quality.

Command

Function

%E0

Modem will disconnect during poor signal quality.

» %E1

Modem retrains during poor signal quality, disconnect if threshold set in S37 is exceeded.

%E2

Modem does nothing during poor signal quality.

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=0 <CR>

Description:

Selects the current DCE speed.

Command

Function

0

Select last AT speed.

3

Select 300bps speed.

5

Select 1200bps speed.

6

Select 2400bps speed.

7

Select 4800bps speed.

8

Select 7200bps speed.

9

Select 9600bps speed.

10

Select 12Kbps speed.

11

Select 14.4Kbps speed.

12

Select 16.8Kbps speed.

13

Select 19.2Kbps speed.

14

Select 21.6Kbps speed.

15

Select 24Kbps speed.

16

Select 26.4Kbps speed.

17

Select 28.8Kbps speed.

ROUND TRIP DELAY

Type:

Register

Format:

AT [cmds] S65=n [cmds]

Example:

AT S65=1 <CR>

Default:

Unidentified

Range:

Unidentified

Unit:

100 ms

Description:

Sets 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.

V42bis COMPRESSION

Type:

Configuration

Format:

AT [cmds] "Hn [cmds]

Example:

AT "H3 &W<CR>

Description:

Controls V.42bis compression.

Command

Function

"H0

V.42bis disabled.

"H1

V.42bis while transmit enabled.

"H2

V.42bis while receiving enabled.

» "H3

V.42bis during transmitting and 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 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 \X0 <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.

Proprietary V.25bis Command Set

COMMAND SET - AT

Type:

Immediate

Format:

CNL[cmds]

Example:

CNL%V0<CR>

Description:

Execute an AT command.

REQUEST LISTED NUMBERS

Type:

Immediate

Format:

RLN

Example:

RLN<CR>

Description:

Requests the modem to return the list of stored numbers. If no numbers are stored, the modem will return LSN.

STORED NUMBERS LIST

Type:

Result code

Format:

LSNxxxx

Example:

LSN 443-3388

Description:

Displays stored numbers. xxxx may specify a memory location, phone number, or status. If no code was specified with RLN, all stored numbers are displayed.