SPORTSTER 56K FAXMODEM (INTERNAL)

U.S. ROBOTICS, INC.

Card Type

Modem (asynchronous)

Chipset

U.S. Robotics, Inc.

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.21CH2, V.27ter, V.29

Error Correction/Compression

MNP5, V.42, V.42bis

Fax Class

Class I & II

Data Bus

8-bit ISA

Card Size

Full height, one-third length

CONNECTIONS

Function

Label

Function

Label

Telephone line out

CN1

Telephone line in

CN2

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í Plug-N-Play disabled

JP1/C

Closed

Plug-N-Play enabled

JP1/C

Open

SERIAL PORT ADDRESS SELECTION

Setting

JP1/A

JP1/B

3F8h (COM1:)

Closed

Closed

í 2E8h (COM2:)

Open

Closed

3F8h (COM3:)

Closed

Open

2E8h (COM4:)

Open

Open

Plug-N-Play

Open

Open

INTERRUPT SELECTION

Setting

JP2/A

JP2/B

JP2/C

JP2/D

JP2/E

2

Closed

Open

Open

Open

Open

í 3

Open

Closed

Open

Open

Open

4

Open

Open

Closed

Open

Open

5

Open

Open

Open

Closed

Open

7

Open

Open

Open

Open

Closed

Plug-N-Play

Open

Open

Open

Open

Open

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

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

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

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.

Proprietary AT Command Set

BIT-MAPPED REGISTER S13

Format

AT [cmds] S13=n [cmds]

Default:

0

Range:

0 - 223

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.

5

0

Not used.

6

í 0

1

MNP 3 enabled.

MNP 3 disabled.

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 - 511

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.

8

í 0

1

V.42 detection phase enabled.

V.42 detection phase disabled.

BIT-MAPPED REGISTER S27

Format:

AT [cmds] S27=n [cmds]

Default:

0

Range:

0 - 255

Description:

Controls V.21, 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

V.21 disabled.

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

í 0

1

V.42 selective reject enabled.

V.42 selective reject disabled.

7

í 0

1

Actual result codes displayed.

Force 9600 result codes.

BIT-MAPPED REGISTER S32

Format:

AT [cmds] S32=n [cmds]

Default:

2

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.

&U11

Set minimum connect speed to 21.6Kbps.

CONNECTION SPEED LOWER LIMIT (CON'T)

Command

Function

&U12

Set minimum connect speed to 24Kbps.

&U13

Set minimum connect speed to 26.4Kbps.

&U14

Set minimum connect speed to 28.8Kbps.

&U15

Set minimum connect speed to 31.2Kbps.

&U16

Set minimum connect speed to 33.6Kbps.

&U17

Set minimum connect speed to 33.3Kbps.

&U18

Set minimum connect speed to 37.3Kbps.

&U19

Set minimum connect speed to 41.3Kbps.

&U20

Set minimum connect speed to 42.6Kbps.

&U21

Set minimum connect speed to 44Kbps.

&U22

Set minimum connect speed to 45.3Kbps.

&U23

Set minimum connect speed to 46.6Kbps.

&U24

Set minimum connect speed to 48Kbps.

&U25

Set minimum connect speed to 49.3Kbps.

&U26

Set minimum connect speed to 50.6Kbps.

&U27

Set minimum connect speed to 52Kbps.

&U28

Set minimum connect speed to 53.3Kbps.

&U29

Set minimum connect speed to 54.6Kbps.

&U30

Set minimum connect speed to 56Kbps.

&U31

Set minimum connect speed to 57.3Kbps.

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.

CONNECTION SPEED UPPER LIMIT (CON'T)

Command

Function

&N16

Set maximum connect speed to 33.6Kbps.

&N17

Set maximum connect speed to 33.3Kbps.

&N18

Set maximum connect speed to 37.3Kbps.

&N19

Set maximum connect speed to 41.3Kbps.

&N20

Set maximum connect speed to 42.6Kbps.

&N21

Set maximum connect speed to 44Kbps.

&N22

Set maximum connect speed to 45.3Kbps.

&N23

Set maximum connect speed to 46.6Kbps.

&N24

Set maximum connect speed to 48Kbps.

&N25

Set maximum connect speed to 49.3Kbps.

&N26

Set maximum connect speed to 50.6Kbps.

&N27

Set maximum connect speed to 52Kbps.

&N28

Set maximum connect speed to 53.3Kbps.

&N29

Set maximum connect speed to 54.6Kbps.

&N30

Set maximum connect speed to 56Kbps.

&N31

Set maximum connect speed to 57.3Kbps.

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.

I4

Displays current command settings.

I5

Displays current NVRAM settings.

I6

Displays current connection’s statistics.

I7

Displays product configuration.

DISTINCTIVE RING

Type:

Register

Format:

AT [cmds] S41=n [cmds]

Description:

Selects whether the modem will use the Distinctive Ring function.

Command

Function

í S41=0

Distinctive ring abled.

S41=1

Distinctive ring enabled.

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.

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] &Bn [cmds]

Description:

Sets operation of serial port speed.

Command

Function

&B0

Serial speed follows connect speed.

&B1

Serial speed locked.

í &B2

Serial speed locked in error correction mode only.

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.

TONE DIALING TEST

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Description:

Begins a tone dialing test.

Command

Function

í S16=0

Tone dialing test disabled.

S16=2

Tone dialing test 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 - 15

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	U.S. Robotics, Inc.
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.21CH2, V.27ter, V.29
Error Correction/Compression	MNP5, V.42, V.42bis
Fax Class	Class I & II
Data Bus	8-bit ISA
Card Size	Full height, one-third length

CONNECTIONS
Function	Label	Function	Label
Telephone line out	CN1	Telephone line in	CN2

USER CONFIGURABLE SETTINGS
Setting	Label	Position
í Plug-N-Play disabled	JP1/C	Closed
Plug-N-Play enabled	JP1/C	Open

SERIAL PORT ADDRESS SELECTION
Setting	JP1/A	JP1/B
3F8h (COM1:)	Closed	Closed
í 2E8h (COM2:)	Open	Closed
3F8h (COM3:)	Closed	Open
2E8h (COM4:)	Open	Open
Plug-N-Play	Open	Open

INTERRUPT SELECTION
Setting	JP2/A	JP2/B	JP2/C	JP2/D	JP2/E
2	Closed	Open	Open	Open	Open
í 3	Open	Closed	Open	Open	Open
4	Open	Open	Closed	Open	Open
5	Open	Open	Open	Closed	Open
7	Open	Open	Open	Open	Closed
Plug-N-Play	Open	Open	Open	Open	Open

BIT-MAPPED REGISTER S13
Format		AT [cmds] S13=n [cmds]
Default:		0
Range:		0 - 223
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.
5	0	Not used.
6	í 0 1	MNP 3 enabled. MNP 3 disabled.
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 - 511
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.
8		í 0 1			V.42 detection phase enabled. V.42 detection phase disabled.

BIT-MAPPED REGISTER S27
Format:		AT [cmds] S27=n [cmds]
Default:		0
Range:		0 - 255
Description:		Controls V.21, 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	V.21 disabled. 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	í 0 1	V.42 selective reject enabled. V.42 selective reject disabled.
7	í 0 1	Actual result codes displayed. Force 9600 result codes.

BIT-MAPPED REGISTER S32
Format:			AT [cmds] S32=n [cmds]
Default:			2
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.
&U11	Set minimum connect speed to 21.6Kbps.

CONNECTION SPEED LOWER LIMIT (CON'T)
Command	Function
&U12	Set minimum connect speed to 24Kbps.
&U13	Set minimum connect speed to 26.4Kbps.
&U14	Set minimum connect speed to 28.8Kbps.
&U15	Set minimum connect speed to 31.2Kbps.
&U16	Set minimum connect speed to 33.6Kbps.
&U17	Set minimum connect speed to 33.3Kbps.
&U18	Set minimum connect speed to 37.3Kbps.
&U19	Set minimum connect speed to 41.3Kbps.
&U20	Set minimum connect speed to 42.6Kbps.
&U21	Set minimum connect speed to 44Kbps.
&U22	Set minimum connect speed to 45.3Kbps.
&U23	Set minimum connect speed to 46.6Kbps.
&U24	Set minimum connect speed to 48Kbps.
&U25	Set minimum connect speed to 49.3Kbps.
&U26	Set minimum connect speed to 50.6Kbps.
&U27	Set minimum connect speed to 52Kbps.
&U28	Set minimum connect speed to 53.3Kbps.
&U29	Set minimum connect speed to 54.6Kbps.
&U30	Set minimum connect speed to 56Kbps.
&U31	Set minimum connect speed to 57.3Kbps.

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.

CONNECTION SPEED UPPER LIMIT (CON'T)
Command	Function
&N16	Set maximum connect speed to 33.6Kbps.
&N17	Set maximum connect speed to 33.3Kbps.
&N18	Set maximum connect speed to 37.3Kbps.
&N19	Set maximum connect speed to 41.3Kbps.
&N20	Set maximum connect speed to 42.6Kbps.
&N21	Set maximum connect speed to 44Kbps.
&N22	Set maximum connect speed to 45.3Kbps.
&N23	Set maximum connect speed to 46.6Kbps.
&N24	Set maximum connect speed to 48Kbps.
&N25	Set maximum connect speed to 49.3Kbps.
&N26	Set maximum connect speed to 50.6Kbps.
&N27	Set maximum connect speed to 52Kbps.
&N28	Set maximum connect speed to 53.3Kbps.
&N29	Set maximum connect speed to 54.6Kbps.
&N30	Set maximum connect speed to 56Kbps.
&N31	Set maximum connect speed to 57.3Kbps.

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.
I4	Displays current command settings.
I5	Displays current NVRAM settings.
I6	Displays current connection’s statistics.
I7	Displays product configuration.

DISTINCTIVE RING
Type:	Register
Format:	AT [cmds] S41=n [cmds]
Description:	Selects whether the modem will use the Distinctive Ring function.
Command	Function
í S41=0	Distinctive ring abled.
S41=1	Distinctive ring enabled.

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.

LOCK SERIAL PORT
Type:	Configuration
Format:	AT [cmds] &Bn [cmds]
Description:	Sets operation of serial port speed.
Command	Function
&B0	Serial speed follows connect speed.
&B1	Serial speed locked.
í &B2	Serial speed locked in error correction mode only.