MACH 2 56K

BEST DATA PRODUCTS, INC.

MACH 2 56K

Card Type

Modem (asynchronous)

Chipset

Unidentified

Maximum Data Rate

56Kbps

Maximum Fax Rate

14.4Kbps

Data Modulation

Bell 103A, 212A

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

U.S. Robotics x2

Fax Modulation

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

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 out

CN1

Telephone line in

CN2

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, B, E, F, H, L, M, O, P, T, V, X, Z

&C, &D, &F, &G, &P, &R, &S, &T, &W, &Z

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S38

Note: See MHI help file for complete information.

UNIDENTIFIED COMMANDS

Command

Default

S31

128

Proprietary AT Command Set

BIT-MAPPED REGISTER S13

Format

AT [cmds] S13=n [cmds]

Default:

0

Range:

0 - 159

Description:

Controls DTR reset, DTR dialing, reset dialing, and MNP3.

Bit

Value

Function

0

í 0

1

DTR normal.

Reset on low DTR.

1

í 0

1

Non-error-correcting mode transmit buffer set to 1.5KB.

Non-error-correcting mode transmit buffer set to 128 bytes.

2

í 0

1

Backspace and delete keys normal.

Backspace and delete keys reversed.

3

í 0

1

DTR dialing disabled.

DTR dialing enabled.

4

í 0

1

Reset dialing disabled.

Reset dialing enabled.

6, 5

00

Not used.

7

í 0

1

Modem enters command state when +++ is received.

Modem disconnects and enters command state when +++ is received.

BIT-MAPPED REGISTER S15

Format:

AT [cmds] S15=n [cmds]

Default:

0

Range:

0 - 255

Description:

Controls error correction and compression in selected protocols, MNP modes, and V.42 operation.

Bit

Value

Function

0

í 0

1

Error correction/compression enabled in V.22 mode.

Error correction/compression disabled in V.22 mode.

1

í 0

1

Error correction/compression enabled in V.22bis mode.

Error correction/compression disabled in V.22bis mode.

2

í 0

1

Error correction/compression enabled in V.32 and V.32bis modes.

Error correction/compression disabled in V.32 and V.32bis modes.

3

í 0

1

MNP handshake enabled.

MNP handshake disabled.

4

í 0

1

MNP4 disabled.

MNP4 enabled.

5

í 0

1

MNP3 disabled.

MNP3 enabled.

6

í 0

1

MNP operation normal

MNP configured for non-compatible modems.

7

í 0

1

V.42 enabled.

V.42 disabled.

BIT-MAPPED REGISTER S27

Format:

AT [cmds] S27=n [cmds]

Default:

0

Range:

0 - 191

Description:

Controls V.21/Bell 103A, V.32 encoding and modulation, V.32bis modulation, V.42 answer tone and selective reject, and 9600 result codes.

Bit

Value

Function

0

í 0

1

Bell 103A enabled.

V.21 enabled.

1

í 0

1

V.32 trellis coding enabled.

V.32 trellis coding disabled.

2

í 0

1

V.32 modulation enabled.

V.32 modulation disabled.

3

í 0

1

2100Hz answer tone enabled.

2100Hz answer tone disabled.

4

í 0

1

Fallback to V.23 disabled.

Fallback to V.23 enabled.

5

í 0

1

V.32bis modulation enabled.

V.32bis modulation disabled.

6

0

Not used.

7

í 0

1

Actual result codes displayed.

Force 9600 result codes.

BIT-MAPPED REGISTER S32

Format:

AT [cmds] S32=n [cmds]

Default:

0

Range:

0 - 59

Description:

Controls V.8 protocol and options, and V.34 and x2 modulation protocols.

Bit

Value

Function

0

í 0

1

V.8 Call Indicate disabled.

V.8 Call Indicate enabled.

1

0

í 1

V.8 disabled.

V.8 enabled.

2

0

Not used.

3

í 0

1

V.34 modulation enabled.

V.34 modulation disabled.

4

í 0

1

V.34 modulation at 31.2Kbps and 33.6Kbps enabled.

V.34 modulation at 31.2Kbps and 33.6Kbps disabled.

5

í 0

1

U.S. Robotics x2 modulation enabled.

U.S. Robotics x2 modulation disabled.

BREAK LENGTH

Type:

Register

Format:

AT [cmds] S21=n [cmds]

Default:

10

Range:

0 - 255

Unit:

10 ms

Description:

Sets the length of error correction mode breaks sent from DCE to DTE.

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] &Yn [cmds]

Description:

Configures action of break signal.

Command

Function

&Y0

Break empties buffer.

í &Y1

Break empties buffer and is sent immediately.

&Y2

Break does not empty buffer and is sent immediately.

COMPRESSION MODE

Type:

Configuration

Format:

AT [cmds] &Kn [cmds]

Description:

Selects the type of data compression that will be used.

Command

Function

&K0

Data compression disabled.

í &K1

Auto-detect compression mode.

&K2

Data compression enabled.

&K3

MNP5 data compression only enabled.

CONNECTION SPEED LOWER LIMIT

Type:

Configuration

Format:

AT [cmds] &Un [cmds]

Description:

Sets slowest allowed connection speed if &N is set to 1 or higher.

Command

Function

&U0

No minimum connect speed.

&U1

Set minimum connect speed to 300bps.

&U2

Set minimum connect speed to 1200bps.

&U3

Set minimum connect speed to 2400bps.

&U4

Set minimum connect speed to 4800bps.

&U5

Set minimum connect speed to 7200bps.

&U6

Set minimum connect speed to 9600bps.

&U7

Set minimum connect speed to 12Kbps.

&U8

Set minimum connect speed to 14.4Kbps.

&U9

Set minimum connect speed to 16.8Kbps.

&U10

Set minimum connect speed to 19.2Kbps.

CONNECTION SPEED LOWER LIMIT (CON'T)

Command

Function

&U11

Set minimum connect speed to 21.6Kbps.

&U12

Set minimum connect speed to 24Kbps.

&U13

Set minimum connect speed to 26.4Kbps.

&U14

Set minimum connect speed to 28.8Kbps.

CONNECTION SPEED UPPER LIMIT

Type:

Configuration

Format:

AT [cmds] &Nn [cmds]

Description:

Sets required connection speed if &U is set to 0; otherwise, sets fastest allowed connection speed.

Command

Function

&N0

No maximum connect speed.

&N1

Set maximum connect speed to 300bps.

&N2

Set maximum connect speed to 1200bps.

&N3

Set maximum connect speed to 2400bps.

&N4

Set maximum connect speed to 4800bps.

&N5

Set maximum connect speed to 7200bps.

&N6

Set maximum connect speed to 9600bps.

&N7

Set maximum connect speed to 12Kbps.

&N8

Set maximum connect speed to 14.4Kbps.

&N9

Set maximum connect speed to 16.8Kbps.

&N10

Set maximum connect speed to 19.2Kbps.

&N11

Set maximum connect speed to 21.6Kbps.

&N12

Set maximum connect speed to 24Kbps.

&N13

Set maximum connect speed to 26.4Kbps.

&N14

Set maximum connect speed to 28.8Kbps.

&N15

Set maximum connect speed to 31.2Kbps.

&N16

Set maximum connect speed to 33.6Kbps.

DIAL

Type:

Immediate

Format:

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

Description:

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

Command

Function

DL

Re-dial last number.

DP

Pulse dialing enabled.

DR

Answer mode enabled; originate mode disabled following handshake initiation.

DSn

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/

Dialing paused for 1/8 second.

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;

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

DISPLAY HELP SCREEN - AMPERSAND

Type:

Configuration

Format:

AT [cmds] &$ [cmds]

Description:

Displays the help screen on the AT& commands.

DISPLAY HELP SCREEN - BASIC

Type:

Configuration

Format:

AT [cmds] $ [cmds]

Description:

Displays the basic help screen.

DISPLAY HELP SCREEN - DIAL

Type:

Configuration

Format:

AT [cmds] D$ [cmds]

Description:

Displays the help screen on the dialing commands.

DISPLAY HELP SCREEN - REGISTERS

Type:

Configuration

Format:

AT [cmds] S$ [cmds]

Description:

Displays the help screen for S registers.

DISPLAY INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays modem properties.

Command

Function

I0

Displays product identification code.

I1

Tests and displays ROM checksum result.

I2

Tests and displays RAM checksum result.

I3

Displays product type.

I4

Displays current command settings.

I5

Displays current NVRAM settings.

I6

Displays link diagnostics.

I7

Displays product configuration.

I10

Displays virtual device driver configuration.

I11

Displays current connection’s statistics for V.34 mode.

ERROR CORRECTION MODE

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Description:

Selects active error correction protocols.

Command

Function

&M0

Normal mode only.

í &M4

Auto-detect mode.

&M5

Error correction mode only.

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] &An [cmds]

Description:

Selects extended result codes.

Command

Function

&A0

Extended result codes disabled.

&A1

Error correction result codes enabled.

&A2

V.32 result code enabled.

í &A3

Error correction and compression result codes enabled.

FLOW CONTROL CHARACTER - XOFF

Type:

Register

Format:

AT [cmds] S23=n [cmds]

Default:

19

Range:

0 - 127

Unit:

1 ASCII character

Description:

Sets the character used to represent XOFF.

FLOW CONTROL CHARACTER - XON

Type:

Register

Format:

AT [cmds] S22=n [cmds]

Default:

17

Range:

0 - 127

Unit:

1 ASCII character

Description:

Sets the character used to represent XON.

FLOW CONTROL - MODEM-TO-MODEM

Type:

Configuration

Format:

AT [cmds] &In [cmds]

Description:

Selects the type of modem-to-modem flow control used.

Command

Function

í &I0

Software flow control disabled.

&I1

XON/XOFF pass-through enabled.

&I2

XON/XOFF pass-through disabled.

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] &Hn [cmds]

Description:

Sets type of flow control used by modem.

Command

Function

&H0

Flow control disabled.

í &H1

CTS/RTS flow control enabled.

&H2

XON/XOFF flow control enabled.

&H3

CTS/RTS and XON/XOFF flow control enabled.

INACTIVITY TIMER

Type:

Register

Format

AT [cmds] S19=n [cmds]

Default:

0

Range:

0 - 255

Unit:

1 minute

Description:

Maximum duration of DTE and DCE inactivity allowed prior to initiating hang-up process.

PROFILE ON POWER-UP

Type:

Configuration

Format:

AT [cmds] Yn [cmds]

Description:

Selects the profile that the modem will reset to on power-up.

Command

Function

í Y0

Modem resets to user profile 0 on power-up.

Y1

Modem resets to user profile 1 on power-up.

Y2

Modem resets to factory generic profile on power-up.

Y3

Modem resets to factory hardware flow control profile on power-up.

Y4

Modem resets to factory software flow control profile on power-up.

REPEAT PREVIOUS COMMAND CONTINUALLY

Type:

Immediate

Format:

A>

Description:

Repeats the previous command until interrupted by the user.

Note:

Do not precede this command with AT, or follow it with <CR>.

RESULT CODES

Type:

Configuration

Format:

AT [cmds] Qn [cmds]

Description:

Enables modem to send result codes to the DTE.

Command

Function

í Q0

Result codes enabled.

Q1

Result codes disabled.

Q2

Result codes enabled in originate mode only.

TEST PATTERN

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Description:

Transmits a test pattern to the remote modem.

Command

Function

í S16=0

Test pattern disabled.

S16=4

Test pattern enabled.

V.21 ANSWER MODE FALLBACK TIMER

Type:

Register

Format:

AT [cmds] S29=n [cmds]

Default:

20

Range:

Unidentified

Unit:

.1 second

Description:

The function of this register is unidentified.

V.32 HANDSHAKE TIME

Type:

Register

Format:

AT [cmds] S28=n [cmds]

Default:

8

Range:

0 - 255

Unit:

.1 second

Description:

Sets length of V.32 handshake. A value of 255 means that the modem will only accept connections with V.32 at 9600bps.

V.34 MAPPING

Type:

Register

Format:

AT [cmds] S34=n [cmds]

Default:

0

Range:

0 - 255

Description:

Controls V.34 mapping, non-linear coding, transmit level deviation, pre-emphasis, and pre-coding.

Bit

Value

Function

0

í 0

1

8S-2D map enabled.

8S-2D map disabled.

1

í 0

1

16S-4D map enabled.

16S-4D map disabled.

2

í 0

1

32S-2D map enabled.

32S-2D map disabled.

3

í 0

1

64S-4D map enabled.

64S-4D map disabled.

4

í 0

1

Non-linear coding enabled.

Non-linear coding disabled.

5

í 0

1

Transmit level deviation enabled.

Transmit level deviation disabled.

6

í 0

1

Pre-emphasis enabled.

Pre-emphasis disabled.

7

í 0

1

Pre-coding enabled.

Pre-coding disabled.

V.34 OPTIONS

Type:

Register

Format:

AT [cmds] S33=n [cmds]

Default:

0

Range:

0 - 255

Description:

Controls V.34 baud rate and shaping.

Bit

Value

Function

0

í 0

1

2400 baud rate enabled.

2400 baud rate disabled.

1

í 0

1

2743 baud rate enabled.

2743 baud rate disabled.

2

í 0

1

2800 baud rate enabled.

2800 baud rate disabled.

3

í 0

1

3000 baud rate enabled.

3000 baud rate disabled.

4

í 0

1

3200 baud rate enabled.

3200 baud rate disabled.

5

í 0

1

3429 baud rate enabled.

3429 baud rate disabled.

6

0

Not used.

7

í 0

1

Shaping enabled.

Shaping disabled.

Card Type	Modem (asynchronous)
Chipset	Unidentified
Maximum Data Rate	56Kbps
Maximum Fax Rate	14.4Kbps
Data Modulation	Bell 103A, 212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis, V.34 U.S. Robotics x2
Fax Modulation	ITU-T V.17, V.27ter, V.29
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 out	CN1	Telephone line in	CN2

BIT-MAPPED REGISTER S13
Format		AT [cmds] S13=n [cmds]
Default:		0
Range:		0 - 159
Description:		Controls DTR reset, DTR dialing, reset dialing, and MNP3.
Bit	Value	Function
0	í 0 1	DTR normal. Reset on low DTR.
1	í 0 1	Non-error-correcting mode transmit buffer set to 1.5KB. Non-error-correcting mode transmit buffer set to 128 bytes.
2	í 0 1	Backspace and delete keys normal. Backspace and delete keys reversed.
3	í 0 1	DTR dialing disabled. DTR dialing enabled.
4	í 0 1	Reset dialing disabled. Reset dialing enabled.
6, 5	00	Not used.
7	í 0 1	Modem enters command state when +++ is received. Modem disconnects and enters command state when +++ is received.

BIT-MAPPED REGISTER S15
Format:			AT [cmds] S15=n [cmds]
Default:			0
Range:			0 - 255
Description:			Controls error correction and compression in selected protocols, MNP modes, and V.42 operation.
Bit	Value			Function
0	í 0 1			Error correction/compression enabled in V.22 mode. Error correction/compression disabled in V.22 mode.
1		í 0 1			Error correction/compression enabled in V.22bis mode. Error correction/compression disabled in V.22bis mode.
2		í 0 1			Error correction/compression enabled in V.32 and V.32bis modes. Error correction/compression disabled in V.32 and V.32bis modes.
3		í 0 1			MNP handshake enabled. MNP handshake disabled.
4		í 0 1			MNP4 disabled. MNP4 enabled.
5		í 0 1			MNP3 disabled. MNP3 enabled.
6		í 0 1			MNP operation normal MNP configured for non-compatible modems.
7		í 0 1			V.42 enabled. V.42 disabled.

BIT-MAPPED REGISTER S27
Format:		AT [cmds] S27=n [cmds]
Default:		0
Range:		0 - 191
Description:		Controls V.21/Bell 103A, V.32 encoding and modulation, V.32bis modulation, V.42 answer tone and selective reject, and 9600 result codes.
Bit	Value	Function
0	í 0 1	Bell 103A enabled. V.21 enabled.
1	í 0 1	V.32 trellis coding enabled. V.32 trellis coding disabled.
2	í 0 1	V.32 modulation enabled. V.32 modulation disabled.
3	í 0 1	2100Hz answer tone enabled. 2100Hz answer tone disabled.
4	í 0 1	Fallback to V.23 disabled. Fallback to V.23 enabled.
5	í 0 1	V.32bis modulation enabled. V.32bis modulation disabled.
6	0	Not used.
7	í 0 1	Actual result codes displayed. Force 9600 result codes.

BIT-MAPPED REGISTER S32
Format:			AT [cmds] S32=n [cmds]
Default:			0
Range:			0 - 59
Description:			Controls V.8 protocol and options, and V.34 and x2 modulation protocols.
Bit	Value			Function
0	í 0 1			V.8 Call Indicate disabled. V.8 Call Indicate enabled.
1	0 í 1			V.8 disabled. V.8 enabled.
2		0			Not used.
3		í 0 1			V.34 modulation enabled. V.34 modulation disabled.
4		í 0 1			V.34 modulation at 31.2Kbps and 33.6Kbps enabled. V.34 modulation at 31.2Kbps and 33.6Kbps disabled.
5		í 0 1			U.S. Robotics x2 modulation enabled. U.S. Robotics x2 modulation disabled.

BREAK LENGTH
Type:	Register
Format:	AT [cmds] S21=n [cmds]
Default:	10
Range:	0 - 255
Unit:	10 ms
Description:	Sets the length of error correction mode breaks sent from DCE to DTE.

BREAK TYPE
Type:	Configuration
Format:	AT [cmds] &Yn [cmds]
Description:	Configures action of break signal.
Command	Function
&Y0	Break empties buffer.
í &Y1	Break empties buffer and is sent immediately.
&Y2	Break does not empty buffer and is sent immediately.

COMPRESSION MODE
Type:	Configuration
Format:	AT [cmds] &Kn [cmds]
Description:	Selects the type of data compression that will be used.
Command	Function
&K0	Data compression disabled.
í &K1	Auto-detect compression mode.
&K2	Data compression enabled.
&K3	MNP5 data compression only enabled.

CONNECTION SPEED LOWER LIMIT
Type:	Configuration
Format:	AT [cmds] &Un [cmds]
Description:	Sets slowest allowed connection speed if &N is set to 1 or higher.
Command	Function
&U0	No minimum connect speed.
&U1	Set minimum connect speed to 300bps.
&U2	Set minimum connect speed to 1200bps.
&U3	Set minimum connect speed to 2400bps.
&U4	Set minimum connect speed to 4800bps.
&U5	Set minimum connect speed to 7200bps.
&U6	Set minimum connect speed to 9600bps.
&U7	Set minimum connect speed to 12Kbps.
&U8	Set minimum connect speed to 14.4Kbps.
&U9	Set minimum connect speed to 16.8Kbps.
&U10	Set minimum connect speed to 19.2Kbps.

CONNECTION SPEED LOWER LIMIT (CON'T)
Command	Function
&U11	Set minimum connect speed to 21.6Kbps.
&U12	Set minimum connect speed to 24Kbps.
&U13	Set minimum connect speed to 26.4Kbps.
&U14	Set minimum connect speed to 28.8Kbps.

CONNECTION SPEED UPPER LIMIT
Type:	Configuration
Format:	AT [cmds] &Nn [cmds]
Description:	Sets required connection speed if &U is set to 0; otherwise, sets fastest allowed connection speed.
Command	Function
&N0	No maximum connect speed.
&N1	Set maximum connect speed to 300bps.
&N2	Set maximum connect speed to 1200bps.
&N3	Set maximum connect speed to 2400bps.
&N4	Set maximum connect speed to 4800bps.
&N5	Set maximum connect speed to 7200bps.
&N6	Set maximum connect speed to 9600bps.
&N7	Set maximum connect speed to 12Kbps.
&N8	Set maximum connect speed to 14.4Kbps.
&N9	Set maximum connect speed to 16.8Kbps.
&N10	Set maximum connect speed to 19.2Kbps.
&N11	Set maximum connect speed to 21.6Kbps.
&N12	Set maximum connect speed to 24Kbps.
&N13	Set maximum connect speed to 26.4Kbps.
&N14	Set maximum connect speed to 28.8Kbps.
&N15	Set maximum connect speed to 31.2Kbps.
&N16	Set maximum connect speed to 33.6Kbps.

DIAL
Type:	Immediate
Format:	AT [cmds] D<#>;[cmds]
Description:	Dials the telephone number indicated according to any modifiers included in the string.
Command	Function
DL	Re-dial last number.
DP	Pulse dialing enabled.
DR	Answer mode enabled; originate mode disabled following handshake initiation.
DSn	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/	Dialing paused for 1/8 second.
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;	Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

DISPLAY HELP SCREEN - AMPERSAND
Type:	Configuration
Format:	AT [cmds] &$ [cmds]
Description:	Displays the help screen on the AT& commands.

DISPLAY HELP SCREEN - BASIC
Type:	Configuration
Format:	AT [cmds] $ [cmds]
Description:	Displays the basic help screen.

DISPLAY HELP SCREEN - DIAL
Type:	Configuration
Format:	AT [cmds] D$ [cmds]
Description:	Displays the help screen on the dialing commands.

DISPLAY HELP SCREEN - REGISTERS
Type:	Configuration
Format:	AT [cmds] S$ [cmds]
Description:	Displays the help screen for S registers.

DISPLAY INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays modem properties.
Command	Function
I0	Displays product identification code.
I1	Tests and displays ROM checksum result.
I2	Tests and displays RAM checksum result.
I3	Displays product type.
I4	Displays current command settings.
I5	Displays current NVRAM settings.
I6	Displays link diagnostics.
I7	Displays product configuration.
I10	Displays virtual device driver configuration.
I11	Displays current connection’s statistics for V.34 mode.

ERROR CORRECTION MODE
Type:	Configuration
Format:	AT [cmds] &Mn [cmds]
Description:	Selects active error correction protocols.
Command	Function
&M0	Normal mode only.
í &M4	Auto-detect mode.
&M5	Error correction mode only.

EXTENDED RESULT CODES
Type:	Configuration
Format:	AT [cmds] &An [cmds]
Description:	Selects extended result codes.
Command	Function
&A0	Extended result codes disabled.
&A1	Error correction result codes enabled.
&A2	V.32 result code enabled.
í &A3	Error correction and compression result codes enabled.

FLOW CONTROL CHARACTER - XOFF
Type:	Register
Format:	AT [cmds] S23=n [cmds]
Default:	19
Range:	0 - 127
Unit:	1 ASCII character
Description:	Sets the character used to represent XOFF.

FLOW CONTROL CHARACTER - XON
Type:	Register
Format:	AT [cmds] S22=n [cmds]
Default:	17
Range:	0 - 127
Unit:	1 ASCII character
Description:	Sets the character used to represent XON.

FLOW CONTROL - MODEM-TO-MODEM
Type:	Configuration
Format:	AT [cmds] &In [cmds]
Description:	Selects the type of modem-to-modem flow control used.
Command	Function
í &I0	Software flow control disabled.
&I1	XON/XOFF pass-through enabled.
&I2	XON/XOFF pass-through disabled.

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] &Hn [cmds]
Description:	Sets type of flow control used by modem.
Command	Function
&H0	Flow control disabled.
í &H1	CTS/RTS flow control enabled.
&H2	XON/XOFF flow control enabled.
&H3	CTS/RTS and XON/XOFF flow control enabled.

INACTIVITY TIMER
Type:	Register
Format	AT [cmds] S19=n [cmds]
Default:	0
Range:	0 - 255
Unit:	1 minute
Description:	Maximum duration of DTE and DCE inactivity allowed prior to initiating hang-up process.

PROFILE ON POWER-UP
Type:	Configuration
Format:	AT [cmds] Yn [cmds]
Description:	Selects the profile that the modem will reset to on power-up.
Command	Function
í Y0	Modem resets to user profile 0 on power-up.
Y1	Modem resets to user profile 1 on power-up.
Y2	Modem resets to factory generic profile on power-up.
Y3	Modem resets to factory hardware flow control profile on power-up.
Y4	Modem resets to factory software flow control profile on power-up.

REPEAT PREVIOUS COMMAND CONTINUALLY
Type:	Immediate
Format:	A>
Description:	Repeats the previous command until interrupted by the user.
Note:	Do not precede this command with AT, or follow it with <CR>.

RESULT CODES
Type:	Configuration
Format:	AT [cmds] Qn [cmds]
Description:	Enables modem to send result codes to the DTE.
Command	Function
í Q0	Result codes enabled.
Q1	Result codes disabled.
Q2	Result codes enabled in originate mode only.

TEST PATTERN
Type:	Register
Format:	AT [cmds] S16=n [cmds]
Description:	Transmits a test pattern to the remote modem.
Command	Function
í S16=0	Test pattern disabled.
S16=4	Test pattern enabled.

V.21 ANSWER MODE FALLBACK TIMER
Type:	Register
Format:	AT [cmds] S29=n [cmds]
Default:	20
Range:	Unidentified
Unit:	.1 second
Description:	The function of this register is unidentified.