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28.8 COMMUNICATOR

SIMPLE TECHNOLOGY, INC.

28.8 COMMUNICATOR

Card Type

Modem (asynchronous)

Chipset

Unidentified

I/O Options

Voice

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Modulation

Bell 103A, 212A

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

Fax Modulation

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

Error Correction/Compression

MNP5, MNP10EC, V.42, V.42bis

Fax Class

Class I & II

Data Bus

PCMCIA Type II

53850

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, B, E, H, L, M, N, O, P, Q, T, V, W, X, Y, Z

&C, &D, &F, &G, &K, &P, &Q, &R, &S, &T, &V, &W, &Y, &Z

Extended AT Commands

\A, \B, \G, \J, \K, \L, \N

%C, %E, %L, %Q

Special AT Commands

:E, *H, -K, )M, @M, -Q

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18, S21, S22, S23, S24, S25

S27, S29, S30, S31, S32, S33, S36, S38, S46, S48, S82, S86, S95, S201

Note: See MHI help file for complete information.

Proprietary AT Command Set

BIT-MAPPED REGISTER S40

Format:

AT [cmds] S40? [cmds]

Default:

Read-only

Range:

0 - 238

Description:

Controls MNP10 negotiation and power level adjustment, break type, and MNP block size.

Bit

Value

Function

1, 0

00

01

10

MNP10 disabled.

MNP10 enabled.

MNP10 enabled; MNP10 used in answer mode only if remote modem specifically requests it.

2

0

1

MNP10 power level adjustment disabled.

MNP10 power level adjustment enabled.

5 - 3

000

001

010

011

100

101

\K0 set.

\K1 set.

\K2 set.

\K3 set.

\K4 set.

\K5 set.

7, 6

00

01

10

11

MNP block size is 64 characters.

MNP block size is 128 characters.

MNP block size is 192 characters.

MNP block size is 256 characters.

BIT-MAPPED REGISTER S41

Format

AT [cmds] S41? [cmds]

Default:

Read-only

Range:

0 - 219

Description:

Selects compression, auto-retrain, flow control, MNP type, and low-speed MNP10.

Note:

Be aware that bit 6 is out of order.

Bit

Value

Function

1, 0

00

01

10

11

Data compression disabled.

MNP5 enabled.

V.42bis enabled.

MNP5 and V.42bis enabled.

6, 2

00

01

10

Auto-retrain disabled.

Auto-retrain enabled.

Auto-fallback/fall-forward enabled.

3

0

1

Flow control disabled.

Flow control enabled.

4

0

1

Stream mode for MNP.

Block mode for MNP.

5

0

Not used.

7

0

1

MNP10 at 2400 and 1200bps disabled.

MNP10 at 2400 and 1200bps enabled.

DIAL

Type:

Immediate

Format:

AT [cmds] D<#>;[cmds]

Description:

Dials the telephone number indicated according to any modifiers included in the string.

Command

Function

DJ

MNP10 link will be negotiated at 1200bps for this call.

DK

MNP10 power level adjustment enabled for this call.

DL

Re-dial last number.

DP

Pulse dialing enabled.

DS=n

Dial stored telephone number n.

DT

Tone dialing enabled.

DW

Dialing resumed following dial tone detection.

D,

Dialing paused for amount of time specified in S8 register.

D!

Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.

D@

Wait for Quiet Answer function enabled. Modem waits until a "quiet answer," a ring-back signal followed by silence up to the time specified in S7, is received prior to executing the rest of the dial string.

D&

Wait for prompt tone detection function enabled. Waits for prompt tone for amount of time specified by the S7 command.

D^

Calling tone disabled for this call.

D;

Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

DISPLAY INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested about the modem.

Command

Function

I0

Displays product identification code.

I1

Displays ROM checksum.

I3

Displays firmware revision.

I4

Displays modem identifier.

I5

Displays country code.

I6

Displays data pump version.

I7

Displays DAA code.

FLOW CONTROL

Type:

Register (read-only)

Format

AT [cmds] S39? [cmds]

Description:

Displays the current flow control.

Value

Meaning

0

Flow control disabled.

3

RTS/CTS flow control enabled.

4

XON/XOFF flow control enabled.

5

Transparent XON/XOFF flow control enabled.

6

XON/XOFF and RTS/CTS flow control enabled.

LINE SPEED

Type:

Register

Format:

AT [cmds] S37=n [cmds]

Description:

Sets the maximum allowable data exchange rate attempted during the handshaking process.

Command

Function

í S37=0

Attempt to connect at fastest common speed.

S37=1

Set speed to 300bps.

S37=2

Set speed to 300bps.

S37=3

Set speed to 300bps.

S37=5

Set speed to 1200bps.

S37=6

Set speed to 2400bps.

S37=7

Attempt to connect with V.23.

S37=8

Set speed to 4800bps.

S37=9

Set speed to 9600bps.

S37=10

Set speed to 12Kbps.

S37=11

Set speed to 14.4Kbps.

S37=12

Set speed to 7200bps.

MNP10 LINK NEGOTIATION

Type:

Register (read-only)

Format:

AT [cmds] S28? [cmds]

Description:

Sets the speed at which MNP10 link negotiation will occur.

Command

Function

S28=0

Link will be negotiated at highest possible speed.

S28=64

Link will be negotiated at 1200bps.

S28=128

Link will be negotiated at 4800bps.