Card Type	Modem (asynchronous)
Chip Set	Unidentified
Maximum Modem Rate	2400bps
Maximum Fax Rate	9600bps
Data Modulation Protocol	Bell 103/212A, ITU-T V.22, V.22bis
Fax Modulation Protocol	ITU-T V.21CH2, V.27ter, V.29
Error Correction/Compression	V.42bis, V.42, MNP5, MNP 10
Fax Class	Class I & II
Data Bus	Unidentified
Card Size	Unidentified

CONNECTIONS
Function	Label		Function		Label
Line in		CN1		Line out		CN2

SERIAL PORT ADDRESS
Setting	SW1/1	SW1/2
COM1 (3F8h)	On	On
COM2 (2F8h)	On	Off
COM3 (3E8h)	Off	On
COM4 (2E8h)	Off	Off

SUPPORTED COMMAND SET

Basic AT Commands

AT, ‘+++’, A/

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

&T, &V, &W, &Y, &Z

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S30, S38, S46

Note: See MHI Help File for full command documentation.

AUTO-MODE DETECTION
Type:	Configuration
Format:	AT [cmds] Nn [cmds]
Description:	Selects various options for the automatic detection and negotiation of protocols during the handshake process if the modem is communicating with a remote modem of dissimilar speed.
Command	Function
N0	Auto-mode detection disabled
í N1	Auto-mode detection enabled

COMMUNICATIONS MODE
Type:	Configuration
Format:	AT [cmds] &Qn [cmds]
Description:	Selects communications mode options
Command	Mode
í &Q0	Asynchronous mode, serial port speed follows connect speed.
&Q5	V.42 error correction mode
&Q6	Buffered asynchronous mode
&Q8	MNP operational mode
&Q9	LAPM negotiation enabled

DATA CARRIER DETECT (DCD)
Type:	Configuration
Format:	AT [cmds] &Cn [cmds]
Description:	Selects whether the DCD option is enabled or disabled
Command	Function
í &C0	DCD enabled
&C1	DCD enabled after carrier signal detected
&C2	DCD on except during the disconnect process

DATA TERMINAL READY (DTR)
Type:	Configuration
Format:	AT [cmds] &Dn [cmds]
Description:	Selects modem response to DTR
Note: The action each variant of &D causes depends on the setting of &Q
Command	Function
í &D0	Modem does not respond to DTR
&D1	Modem goes to command mode after DTR goes is off
&D2	Modem goes to command mode and disconnects (hangs up) after DTR goes off; Auto-Answer is disabled.
&D3	Modem is initialized after DTR goes off

DIAL
Type:	Immediate
Format:	AT [cmds] D<#> [cmds]
Description:	Dials telephone number according to any modifiers included in the string
Note:	Any combination of modifiers can be used to produce the desired dial functions in sequence.
Command	Function
DL	Re-dial last number
DP	Pulse dialing enabled
DR	Answer mode enabled; originate mode disabled following handshake initiation.
DS=n	Dial stored telephone number n
DT	Tone dialing enabled/Pulse dialing disabled
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 Quite 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;	Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

DSR OPTIONS
Type:	Configuration
Format:	AT [cmds] &Sn [cmds]
Description:	Set DSR options
Command	Mode
í &S0	Force DSR on
&S1	Assert DSR during handshaking, turn off DSR in test mode or idle. DSR off on disconnect.

FACTORY DEFAULT PROFILE
Type:	Configuration
Format:	AT [cmds] &F [cmds]
Description:	Sets values in active profile to values found in the default profile
Command	Function
í &F0	Hayes-compatible settings
&F1	IBM-compatible settings

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] &Kn [cmds]
Description:	Enables flow control options
Command	Function
&K0	Flow control disabled
í &K3	RTS/CTS flow control enabled
&K4	XON/XOFF flow control enabled
&K5	Transparent XON/XOFF flow control enabled

GUARD TONE
Type:	Configuration
Format:	AT [cmds] &Gn [cmds]
Description:	Command is included for compatibility and performs no function

JACK TYPE
Type:	Configuration
Format:	AT [cmds] &Jn [cmds]
Description:	Command is included for compatibility and performs no function

LINE TYPE
Type:	Configuration
Format:	AT [cmds] &Ln [cmds]
Description:	Command is included for compatibility and performs no function

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays information requested
Command	Function
I1	Reports ROM checksum
I2	Tests and reports ROM checksum
I3	Reports firmware revision number
I4	Reports modem feature availability

RESULT CODES
Type:	Configuration
Format:	AT [cmds] Qn [cmds]
Description:	Enables modem to send result codes to the DTE
Command	Function
í Q0	Result code sending enabled
Q1	Result code sending disabled
Q2	Modem returns result codes when originating a call, but does not return result codes when answering a call.

RTS/CTS
Type:	Configuration
Format:	AT [cmds] &Rn [cmds]
Description:	Command is included for compatibility and performs no function

SPEAKER VOLUME
Type:	Configuration
Format:	AT [cmds] Ln [cmds]
Description:	Controls speaker volume
Command	Function
L0	Low volume setting
L1	Low volume setting
í L2	Medium volume setting
L3	Highest volume setting

TRANSMIT CLOCK SELECTION
Type:	Configuration
Format:	AT [cmds] &Xn [cmds]
Description:	Command is included for compatibility and performs no function

ERROR CORRECTION NEGOTIATION
Type:	Register
Format	AT [cmds] S36=n [cmds]
Description:	Selects the action of the modem if it fails to connect with the error-correction protocol set in &Q.
Command	Function
S36=0	Hang up
S36=1	Attempt a direct connection
S36=3	Attempt a buffered connection
S36=4	Attempt a connection at MNP2-4; if that fails, hang up.
S36=5	Attempt a connection at MNP2-4; if that fails, attempt a direct connection.
í S36=7	Attempt a connection at MNP2-4; if that fails, attempt a buffered connection.

DCE LINE SPEED
Type:	Register
Format	AT [cmds] S37=n [cmds]
Description:	Sets the maximum allowable data exchange rate attempted during handshake process.
Command	Function
í S37=0	Speed of last connection
S37=3	300bps
S37=5	1200bps
S37=6	2400bps
S37=7	75/1200bps

FEATURE NEGOTIATION OPTIONS
Type:			Register
Format:	AT [cmds] S48=n [cmds]
Description:	Selects active error correction and compression protocols
Command		Function
S48=0		Detection negotiation disabled, XID negotiation disabled
í S48=7		Detection negotiation and XID negotiation enabled
S48=128		Fall-back to options set in S36

BREAK OPTIONS
Type:		Register
Format		AT [cmds] S82=n [cmds]
Description:		Sets the method for break transmission during error-control and ASB connections.
Command	Function
S82=3	In-sequence signaling, timed break sent in sequence with transmitted data
S82=7	Destructive signaling, buffers cleared, immediately send timed break
í S82=128	In-sequence signaling, timed break sent in sequence with transmitted data

CONNECTION FAILURE CODES
Type:	Register
Format	AT [cmds] S86? [cmds]
Description:	Reports codes which correspond to the possible causes of a connection failure
Value	Meaning
0	Normal hang up
4	Carrier signal lost
5	No error-control detected for remote modem during feature negotiation
9	No common protocol found
12	No failure - remote modem disconnected normally
13	Remote modem failed to respond after 10 re-transmissions same message
14	Violation of negotiated protocol caused failure

EXTENDED RESULT CODES
Type:	Register
Format	AT [cmds] S95=n [cmds]
Default:	0
Range:	0-255
Unit:	Bit-mapped
Description:	Works in combination with the Wn command to enable extended result codes. Features enabled by S95 take precedence over the options selected by Wn.
Value	Meaning
0	Extended messages disabled
1	Use DCE speed rather than DTE speed when reporting CONNECT messages
2	Append /ARQ to CONNECT result message when an EC connection is established
4	Enable CARRIER messages
8	Enable PROTOCOL messages
32	Enable COMPRESSION messages

SIGNAL QUALITY OPTIONS
Type:	Register
Format	AT [cmds] S101=n [cmds]
Description:	Sets the required signal quality for the fastest speed at which handshaking can occur, as set in S109, when using the V.32bis and V.FC protocols. If the signal quality is below that set by S108, then the modem attempts to connect at the next highest speed selected in S109.
Note: ATN0 command is used, only the speed set in S37 is used during handshaking.
Command	Function
í 0	MNP level 10 service disabled
1	MNP level 10 service enabled. Transmit level fixed at -10dBn. Negotiation occurs at mutually-agreed line speed
3	MNP level 10 service enabled. Transmit level adjusted during retrain/speed shift. Negotiation occurs at mutually-agreed line speed
5	MNP level 10 services enabled. Transmit level fixed at -10dBm. Negotiation occurs at 1200bps.
7	MNP level 10 services enabled. Transmit level adjusted during retrain/speed shift. Negotiation occurs at 1200bps.