Card Type	Modem (asynchronous)
Chipset	U.S. Robotics
Maximum Data Rate	33.6Kbps
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 Rockwell V.FC
Fax Modulation	ITU-T V.17, V21CH2, V.27ter, V.29
Error Correction/Compression	MNP5, V.42, V.42bis
Fax Class	Class I & II
Data Bus	8-bit ISA

CONNECTIONS
Function	Label	Function	Label
Telephone line	CN1	Telephone line	CN2

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

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

&C, &D, &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.

BIT-MAPPED REGISTER S13
Format		AT [cmds] S13=n [cmds]
Default:		0
Range:		0 - 217
Description:		Controls DTR reset, DTR dialing, reset dialing, and MNP3.
Bit	Value	Function
0	í 0 1	DTR normal. Reset on low DTR.
2, 1	00	Not used.
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.

BIT-MAPPED REGISTER S15
Format:		AT [cmds] S15=n [cmds]
Default:		0
Range:		0 - 56
Description:		Controls non-error-correcting mode buffer, MNP4, and BS/DEL switch.
Bit	Value	Function
2 - 0	000	Not used.
3	í 0 1	Non-error-correcting mode transmit buffer set to 1.5KB. Non-error-correcting mode transmit buffer set to 128 bytes.
4	í 0 1	MNP 4 enabled. MNP 4 disabled.
5	í 0 1	Backspace and delete keys normal. Backspace and delete keys reversed.

BIT-MAPPED REGISTER S27
Format:		AT [cmds] S27=n [cmds]
Default:		0
Range:		0 - 191
Description:		Controls V.21, V.32 encoding and modulation, V.42 answer tone and handshake, 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.
5, 4	í 00 01 10 11	V.42 detect, LAPM and MNP enabled. V.42 detect and LAPM enabled. MNP enabled. LAPM enabled.
6	0	Not used.
7	í 0 1	Actual result codes displayed. Force 9600 result codes.

BREAK LENGTH
Type:	Register
Format:	AT [cmds] S21=n [cmds]
Default:	10
Range:	0 - 255
Unit:	10 ms
Description:	Sets the length of error control 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 and is not send to remote modem.
í &Y1	Break empties buffer and is sent immediately to remote modem.
&Y2	Break does not empty buffer and is sent immediately to remote modem.

COMPRESSION AND ERROR CORRECTION
Type:		Register
Format:		AT [cmds] S51=n [cmds]
Default:		0
Range:		0 - 7
Description:		Selects compression and error correction for specific modulations.
Bit	Value	Function
0	í 0 1	MNP/V.42 enabled during V.22 operation. MNP/V.42 disabled during V.22 operation.
1	í 0 1	MNP/V.42 enabled during V.22bis operation. MNP/V.42 disabled during V.22bis operation.
2	í 0 1	MNP/V.42 enabled during V.32bis operation. MNP/V.42 disabled during V.32bis operation.

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 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
í &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.

CONNECTION SPEED UPPER LIMIT (CON’T)
Command	Function
&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.

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
í &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.
&U12	Set minimum connect speed to 24Kbps.
&U13	Set minimum connect speed to 26.4Kbps.
&U14	Set minimum connect speed to 28.8Kbps.

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 current connection’s statistics.
I7	Displays product configuration.

DISPLAY LAST DIAL STRING
Type:	Immediate
Format:	AT [cmds] &ZL? [cmds]
Description:	Displays the last executed dial string.

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	ARQ mode only.

ESCAPE SEQUENCE RESPONSE
Type:	Register
Format:	AT [cmds] S14=n [cmds]
Description:	Controls the modem's reaction to an escape sequence.
Command	Function
S14=0	Normal operation.
S14=1	When +++ is received, modem disconnects and enters command state.

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

FACTORY DEFAULTS
Type:	Immediate
Format:	AT [cmds] &Fn [cmds]
Description:	Resets the modem to the specified factory profile.
Command	Function
&F0	Modem resets to factory generic profile.
&F1	Modem resets to factory hardware flow control profile.
&F2	Modem resets to factory software flow control profile.

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 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.

HELP - AMPERSAND
Type:	Immediate
Format:	AT [cmds] &$
Description:	Displays the AT& command set.

HELP - BASIC
Type:	Immediate
Format:	AT [cmds] $
Description:	Displays the basic (no prefix) AT command set.

HELP - DIAL
Type:	Immediate
Format:	AT [cmds] D$
Description:	Displays dialing options.

INACTIVITY TIMER
Type:	Register
Format:	AT [cmds] S19=n [cmds
Default:	0
Range:	0 - 255
Unit:	1 minute
Description:	Sets the length of time that the modem does not receive information before it disconnects.

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.
í &B1	Serial speed locked.
&B2	Serial speed locked in ARQ mode only.

PROFILE ON POWER-UP
Type:	Configuration
Format:	AT [cmds] Yn [cmds]
Description:	Selects the profile to restore into the active profile on power-up.
Command	Function
í Y0	Restore profile 0 on power-up.
Y1	Restore profile 1 on power-up.

RESET MODEM
Type:	Immediate
Format:	AT [cmds] Zn [cmds]
Description:	Resets the modem to the specified profile.
Command	Function
Z0	Modem resets to profile set with the Y command.
Z1	Modem resets to user profile 0.
Z2	Modem resets to user profile 1.
Z3	Modem resets to factory generic profile.
Z4	Modem resets to factory hardware flow control profile.
Z5	Modem resets to factory software flow control profile.

STORE TELEPHONE NUMBER
Type:	Configuration
Format:	AT [cmds] &Zn=<#> AT [cmds] &Zn=L
Description:	Writes the indicated telephone number into the non-volatile memory at location n. If the second form is used, the last dial string executed will be stored.

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.32 AND V.32bis MODULATIONS
Type:		Register
Format:		AT [cmds] S34=n [cmds]
Default:		6
Range:		0 - 15
Description:		Controls V.32 and V.32bis modulations.
Bit	Value	Function
0	í 0 1	V.32bis enabled. V.32bis disabled.
2, 1	11	Not used.
3	í 0 1	V.32 modulation disabled. V.32 modulation enabled.

V.32 HANDSHAKE TIME
Type:	Register
Format:	AT [cmds] S28=n [cmds]
Default:	8
Range:	0 - 255
Unit:	.1 second
Description:	Sets the length of the V.32 handshaking phase.

V.34 AND V.FC OPTIONS
Format:		AT [cmds] S56=n [cmds]
Default:		0
Range:		0 - 223
Description:		Controls non-linear coding, transmit level deviation, pre-emphasis, pre-coding, shaping, V.34, and V.FC.
Bit	Value	Function
0	í 0 1	Non-linear coding enabled. Non-linear coding disabled.
1	í 0 1	Transmit level deviation enabled. Transmit level deviation disabled.
2	í 0 1	Pre-emphasis enabled. Pre-emphasis disabled.
3	í 0 1	Pre-coding enabled. Pre-coding disabled.
4	í 0 1	Shaping enabled. Shaping disabled.
5	0	Not used.
6	í 0 1	V.34 enabled. V.34 disabled.
7	í 0 1	V.FC enabled. V.FC disabled.

V.34 MAPPING
Type:		Register
Format:		AT [cmds] S55=n [cmds]
Default:		0
Range:		0 - 15
Description:		Controls V.34 mapping.
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.

V.34 OPTIONS
Type:		Register
Format:		AT [cmds] S54=n [cmds]
Default:		0
Range:		0 - 255
Description:		Controls V.34 baud rate, call indicate, and V.8.
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	í 0 1	Call indicate during V.34 operation enabled. Call indicate during V.34 operation disabled.
7	í 0 1	V.8 during V.34 operation enabled. V.8 during V.34 operation disabled.

XON/XOFF PASS-THROUGH
Type:	Configuration
Format:	AT [cmds] &In [cmds]
Description:	Selects whether XON/XOFF signals received from the DTE are sent to the remote modem.
Command	Function
í &I0	Software flow control disabled.
&I1	XON/XOFF passed through local modem.
&I2	XON/XOFF signals trapped by local modem.