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28IDSSA, 28ISSA

ASPEN TECHNOLOGIES, INC.

28IDSSA, 28ISSA

Card Type

Modem (asynchronous)

Chipset

Sierra

I/O Options

Microphone in, speaker out, voice

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Modulation

Bell 103A, 212A

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

Fax Modulation

Unidentified

Error Correction/Compression

MNP5, V.42, V.42bis

Fax Class

Class I & II

Data Bus

16-bit ISA

Card Size

Full height, half length

CONNECTIONS

Function

Label

Function

Label

Telephone line

CN1

Microphone in or speaker out

CN3

Telephone line

CN2

Microphone in or speaker out

CN4

Note: It is not identified which of CN3 and CN4 is the microphone in jack and which is the speaker out jack.

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Audio volume set to high setting

JP4

Closed

Audio volume set to low setting

JP4

Open

Audio jacks are stereo

JP5

Closed

Audio jacks are monaural

JP5

Open

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, D, E, H, L, M, O, P, Q, T, V, X, Y, Z

&C, &D, &F, &T, &V, &W, &Y, &Z

Extended AT Commands

\Q

%A, %C, %Q

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S12, S18, S25, S26, S38

Note: See MHI help file for complete information.

UNIDENTIFIED COMMANDS

Command

Default

S40

Unidentified

S41

Unidentified

Proprietary AT Command Set

ANSWER MODE

Type:

Configuration

Format:

AT [cmds] %On [cmds]

Description:

Selects when the modem will be in answer mode.

Command

Function

%O0

Modem automatically enters answer mode when line rings.

%O1

Modem is always in answer mode.

%O2

Modem auto-answers calls in originate mode.

AUTO-FALLBACK/FALL-FORWARD

Type:

Configuration

Format:

AT [cmds] &An [cmds]

Description:

Controls auto-fallback/fall-forward mode.

Command

Function

&A0

Auto-fallback/fall-forward disabled.

&A1

Auto-fallback/fall-forward enabled.

AUTO-RELIABLE TIME BUFFER CONFIGURATION

Type:

Configuration

Format:

AT [cmds] \Cn [cmds]

Description:

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

Command

Function

\C0

Data is discarded.

\C1

Data is buffered for 4 seconds or 200 characters.

í \C2

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

\C3

Data is buffered for 4 seconds or 200 characters. Modem uses V.14 to fall back to normal mode.

\C4

Data is discarded; modem returns to normal mode on receiving auto-reliable fallback character. Modem uses V.14 to fall back to normal mode.

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Description:

Configures action of break signal.

Command

Function

\K0

Break sent to remote modem immediately and buffers cleared.

\K1

Break sent to remote modem immediately and buffers not cleared.

\K2

Break sent with transmitted data.

\K3

Breaks ignored.

\K4

Break sent with transmitted data until no break character is detected.

\K5

Break sent with transmitted data until no break character is detected.

CHARACTER ABORT

Type:

Configuration

Format:

AT [cmds] %Kn [cmds]

Description:

Selects the character abort function.

Command

Function

%K0

Character abort enabled with 2 second delay.

%K1

Character abort disabled.

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Description:

Controls the type of connection the modem will make.

Command

Function

\N0

Normal mode enabled.

\N1

Direct mode enabled.

\N2

MNP reliable mode enabled.

í \N3

Auto-reliable mode or MNP auto-reliable mode enabled.

\N4

V.42 reliable mode enabled.

\N5

V.42 auto-reliable mode or MNP auto-reliable mode enabled.

\N6

V.13 half-duplex simulation mode enabled.

DATA FORMAT

Type:

Configuration

Format:

AT [cmds] \Bn [cmds]

Description:

Selects the data size and parity the modem will use if no AT command is sent for it to auto-detect.

Command

Function

\B0

6 data bits, no parity, 1 stop bit.

\B1

7 data bits, no parity, 1 stop bit.

\B2

7 data bits, 1 stop bit, parity type set by \P command.

\B3

8 data bits, no parity, 1 stop bit.

\B4

7 data bits, 2 stop bits, parity type set by \P command.

\B5

8 data bits, 1 stop bit, parity type set by \P command.

DATA PARITY

Type:

Configuration

Format:

AT [cmds] \Pn [cmds]

Description:

Selects the parity of the local serial port data.

Command

Function

\P0

Even parity selected.

\P1

SPACE parity selected.

\P2

Odd parity selected.

\P3

Mark parity selected.

\P4

Auto-detect parity from last entered AT command.

DISPLAY INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested about the modem.

Command

Function

I0

Displays product identification code.

I3

Displays firmware revision.

I4

Displays modem configuration.

DSR SIGNAL

Type:

Configuration

Format:

AT [cmds] &Sn [cmds]

Description:

Controls the behaviour of the DSR signal.

Command

Function

í &S0

DSR forced high except at disconnect.

&S1

DSR normal.

&S2

DSR follows DCD.

&S3

DSR forced high.

DSR SIGNAL - TEST MODE

Type:

Configuration

Format:

AT [cmds] %Dn [cmds]

Description:

Controls the behaviour of the DSR signal when the modem is in analog loopback test mode.

Command

Function

%D0

DSR forced high.

í %D1

DSR forced low.

DTR DIALING

Type:

Configuration

Format:

AT [cmds] %Zn [cmds]

Description:

Selects the the modem's reaction to the DTR signal going high.

Command

Function

%Z0

DTR dialing disabled.

%Z1

Modem will dial stored number.

%Z2

Modem will go off-hook and attempt to connect.

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] \Vn [cmds]

Description:

Selects error correction and compression extended result codes.

Command

Function

\V0

Modem returns CONNECT message after connecting and PROTOCOL: message after the link is negotiated; modem returns DCE rate.

\V1

Modem returns CONNECT and PROTOCOL: messages after the link is negotiated; modem returns DTE rate.

\V2

Modem returns CONNECT /REL message after the link is negotiated; modem returns DTE rate.

í \V3

Error correction and compression extended result codes disabled; modem returns DCE rate for normal connections and DTE rate for error correcting connections.

FLOW CONTROL - MODEM TO MODEM

Type:

Configuration

Format:

AT [cmds] \Gn [cmds]

Description:

Selects modem-to-modem flow control.

Command

Function

í \G0

Flow control disabled.

\G1

Flow control enabled.

\G2

Flow control enabled on transmit only.

\G3

Pass-through flow control enabled.

LOCAL SERIAL PORT SPEED

Type:

Configuration

Format:

AT [cmds] \Tn [cmds]

Description:

Sets the speed of the local serial port.

Command

Function

\T0

Auto-detect current serial port speed.

í \T1

Set speed to speed of last AT command.

\T2

Set speed to 300bps.

\T3

Set speed to 1200bps.

\T4

Set speed to 2400bps.

\T5

Set speed to 4800bps.

\T6

Set speed to 7200bps.

\T7

Set speed to 9600bps.

\T8

Set speed to 12Kbps.

\T9

Set speed to 14.4Kbps.

\T10

Set speed to 16.8Kbps.

\T11

Set speed to 19.2Kbps.

\T12

Set speed to 21.6Kbps.

\T13

Set speed to 24Kbps.

\T14

Set speed to 26.4Kbps.

\T15

Set speed to 28.8Kbps.

\T16

Set speed to 38.4Kbps.

\T17

Set speed to 57.6Kbps.

\T18

Set speed to 76.8Kbps.

\T19

Set speed to 115.2Kbps.

\T20

Set speed to 128Kbps.

LOCAL SERIAL PORT SPEED - CONNECT MESSAGES

Type:

Configuration

Format:

AT [cmds] %Rn [cmds]

Description:

Sets the speed at which the modem will send CONNECT messages.

Command

Function

%R0

Auto-detect current serial port speed.

í %R1

Send messages at speed of last AT command.

%R2

Send messages at 300bps.

%R3

Send messages at 1200bps.

%R4

Send messages at 2400bps.

%R5

Send messages at 4800bps.

%R6

Send messages at 7200bps.

%R7

Send messages at 9600bps.

%R8

Send messages at 12Kbps.

%R9

Send messages at 14.4Kbps.

%R10

Send messages at 16.8Kbps.

%R11

Send messages at 19.2Kbps.

%R12

Send messages at 21.6Kbps.

%R13

Send messages at 24Kbps.

%R14

Send messages at 26.4Kbps.

%R15

Send messages at 28.8Kbps.

%R16

Send messages at 38.4Kbps.

%R17

Send messages at 57.6Kbps.

%R18

Send messages at 76.8Kbps.

%R19

Send messages at 115.2Kbps.

%R20

Send messages at 128Kbps.

OVERSPEED CORRECTION

Type:

Configuration

Format:

AT [cmds] \An [cmds]

Description:

Selects the amount of overspeed correction the modem will use.

Command

Function

í \A0

Select 1.25% overspeed correction.

\A1

Select 2.5% overspeed correction.

PROTOCOL/SPEED

Type:

Configuration

Format:

AT [cmds] &Hn [cmds]

Description:

Selects the protocol and speed the modem will attempt to connect at

Command

Function

&H0

Auto-detect fastest common protocol.

&H1

Select V.34 only.

&H2

Select V.32bis or below.

&H3

Select V.32bis only.

&H4

Select V.32 or below.

&H5

Select V.32 only.

&H6

Select V.22bis or below.

&H7

Select V.22 only.

&H8

Select Bell 212A only.

&H9

Select Bell 103A only.

&H10

Select V.21 only.

RETRAIN MODE

Type:

Configuration

Format:

AT [cmds] %Qn [cmds]

Description:

Selects the modem's reaction to a poor quality connection.

Command

Function

%Q0

Modem will not retrain.

%Q1

Modem will retrain up to three times, then it will disconnect if line quality is still to poor to support connection.

%Q2

Modem will retrain until line quality is good enough to support connection.

RETRANSMISSION MAXIMUM

Type:

Register

Format:

AT [cmds] S70=n [cmds]

Description:

Sets the maximum number of times that the modem will retransmit a packet due to errors before the modem will hang up.

RTS SIGNAL

Type:

Configuration

Format:

AT [cmds] &Rn [cmds]

Description:

 

Command

Function

&R0

RTS normal in asynchronous connect mode and forced high in asynchronous command mode. In synchronous mode, RTS follows CTS with delay set by S26 command.

í &R1

RTS normal in connect mode, forced high in asynchronous command mode.

&R2

RTS normal.

&R3

RTS forced high.

TRELLIS CODING

Type:

Configuration

Format:

AT [cmds] &Un [cmds]

Description:

Selects whether the modem will use trellis coding.

Command

Function

í &U0

Trellis coding enabled.

&U1

Trellis coding disabled.