Card Type	Modem
Chip Set	Unidentified
I/O Options	25-pin serial port, power, microphone in, speaker jack
Maximum Data Rate	56Kbps
Maximum Fax Rate	14.4Kbps
Fax Class	Class I & II
Data Modulation Protocol	Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis
Fax Modulation Protocol	ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression	MNP5, V.42, V.42bis
Data Bus	External

CONNECTIONS
Function	Label		Function		Label
25-pin serial port		CN1		Speaker jack		CN3
Power		CN2		Microphone jack		CN4

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
PWR	Unidentified	On	Power is on
PWR	Unidentified	Off	Power is off
ONLN	Unidentified	On	Modem is switched to the transmission line
ONLN	Unidentified	Off	Modem is not switched to the transmission line
DSR	Unidentified	On	Answer tone is detected
DSR	Unidentified	Off	Answer tone not detected
DCD	Unidentified	On	Carrier signal detected
DCD	Unidentified	Off	Carrier signal not detected
CTS	Unidentified	On	Modem is ready to transmit data
CTS	Unidentified	Off	Modem is not ready to transmit data
RTS	Unidentified	On	Transmission is being requested
RTS	Unidentified	Off	Transmission is not being requested
DTR	Unidentified	On	Computer is ready for operation
DTR	Unidentified	Off	Computer is not ready for operation

SUPPORTED COMMAND SET

Basic AT Commands

AT, A/

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

&C, &F, &R, &T, &V, &W, &X, &Y, &Z

Extended AT Commands

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

%C, %F

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16,S18, S24, S25, S26

S29, S30, S31, S32, S33, S38, S40, S95

V.25bis Commands

CIC, CRI, CRN, CRS, DIC, PRI, PRN, RLN

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. Handshake begins at line speed designated by the S37 register. If S37=0 handshake follows interface speed
N1	Auto-mode detection enabled.

COMMUNICATIONS MODE
Type:	Configuration
Format:	AT [cmds] &Mn [cmds]
Description:	Selects communications mode
Command	Mode
&M0	Asynchronous mode
&M1	Synchronous connect mode and asynchronous off-line command mode.
&M2	Synchronous connect mode and asynchronous off-line command mode and set DTR high.

COMMUNICATIONS MODE
Type:	Configuration
Format:	AT [cmds] &Qn [cmds]
Description:	Selects communications mode options
Command	Mode
&Q0	Asynchronous mode
&Q1	Synchronous connect mode and asynchronous off-line command mode.
&Q2	Synchronous connect mode and asynchronous off-line command mode and set DTR high.
&Q4	Auto-synchronous mode
&Q5	Error correction mode
&Q6	Buffered asynchronous mode

DATA SET READY (DSR)
Type:	Configuration
Format:	AT [cmds] &Sn [cmds]
Description:	Selects DSR options
Command	Function
&S0	DSR forced high
&S1	DSR high only while modem is handshaking or connected

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
DP	Pulse dialing enabled
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 1 second
D!	Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.
D^	Calling tone disabled
D;	Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] &Kn [cmds]
Description:	Enables flow control options
Command	Function
&K0	Flow control disabled
&K3	RTS/CTS flow control enabled
&K4	XON/XOFF flow control enabled
&K5	Transparent XON/XOFF flow control enabled
&K6	RTS/CTS & XON/XOFF flow control enabled

GUARD TONE
Type:	Configuration
Format:	AT [cmds] &Gn [cmds]
Description:	Commands the modem to transmit a guard tone in V.22/V.22bis
Note: Used primarily for international data transmission
Command	Function
&G0	Guard tone disabled
&G1	Guard tone disabled
&G2	1800Hz guard tone enabled

HOOK CONTROL
Type:	Immediate
Format:	AT [cmds] Hn [cmds]
Description:	Selects whether the modem is on-hook or off-hook
Command	Function
H0	Modem commanded to go on-hook (hang-up)

MODULATION & SPEED
Type:	Configuration
Format:	AT [cmds] Fn [cmds]
Description:	Selects interface speed and modulation
Command	Function
F0	Automatic speed negotiation
F1	V.21 or Bell 103 (ATB)
F3	V.23 75/1200bps
F4	V.22 at 1200bps
F5	V.22 at 2400bps; fallback to 1200bps
F6	V.32bis or V.32 at 4800bps
F7	V.32bis at 7200bps
F8	V32bis or V.32 at 9600bps
F9	V.32bis at 12.0Kbps
F10	V.32bis at 14.4Kbps

ON-LINE
Type:	Immediate
Format:	AT [cmds] On [cmds]
Description:	Controls on-line command (data transmission) state options.
Note: The O command must be placed at the end of the command string.
Command	Function
O0	On-line command mode with no retraining enabled

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays information requested
Command	Function
I0	Reports product code
I1	Reports ROM checksum
I2	Tests and reports ROM checksum
I3	Reports firmware version
I4	Reports device name
I5	Reports country code
I6	Reports data pump model

SPEAKER VOLUME
Type:	Configuration
Format:	AT [cmds] Ln [cmds]
Description:	Controls speaker volume. Hardware currently limits speaker settings to on/off
Command	Function
í L0, L1	Low volume setting
L2	Medium volume setting
L3	High volume setting

AUTO-RETRAIN - AUTO-FALLBACK/FALL-FORWARD
Type:	Configuration
Format:	AT [cmds] %En [cmds]
Description:	Controls auto-retrain mode and fallback/fall-forward
Command	Function
í %E0	Auto-retrain disabled
%E1	Auto-retrain enabled

BREAK SEND
Type:	Configuration
Format:	AT [cmds] \Bn [cmds]
Description:	Sends break to modem. Break signal is fixed at 300ms

DISPLAY CONFIGURATION
Type:	Immediate
Format:	AT [cmds] \Sn [cmds]
Description:	Displays current modem configuration

DISPLAY STORED NUMBERS
Type:	Immediate
Format:	AT [cmds] \Fn [cmds]
Description:	Displays numbers stored with &Z

V.23 - SPLIT-SPEED
Type:	Configuration
Format:	AT [cmds] \Wn [cmds]
Description:	Controls V.23 split-speed mode
Command	Function
\W1	V.23 split-speed mode enabled

DISPLAY PASSWORDS
Type:	Immediate
Format:	AT [cmds] *L [cmds]
Description:	Lists security passwords inserted into callback numbers (*P)

EXIT FROM REMOTE CONFIGURATION
Type:	Configuration
Format:	AT [cmds] *E [cmds]
Description:	Exits modem from remote setting. Valid only when modem is in remote setting (*R)

MNP - EXTENDED SERVICES
Type:	Configuration
Format:	AT [cmds] -Kn [cmds]
Description:	Selects MNP extended services
Command	Function
-K1	MNP extended services enabled

MNP10 - LINK NEGOTIATION
Type:	Configuration
Format:	AT [cmds] *Hn [cmds]
Description:	Sets the speed at which MNP10 link negotiation will occur
Command	Function
*H0	Link will be negotiated at highest possible speed
*H1	Link will be negotiated at 1200bps

PASSWORDS FOR AUTOMATIC CALLBACK
Type:	Immediate
Format:	AT [cmds] *Pn [cmds]
Range:	0-19
Unit:	ASCII
Description:	Stores passwords with their related telephone numbers. Password is a 6-12 digit string. Telephone number can be up to 40 characters.

REMOTE SECURITY CODE
Type:	Configuration
Format:	AT [cmds] *C [cmds]
Description:	Executes security code feature of remote setting. Password is a 6-12 digit string. Default password is QWERTY

REMOTE SETTING
Type:	Immediate
Format:	AT [cmds] *R [cmds]
Description:	Remote setting is available if the function is enabled and MNP connection is enabled

BIT-MAPPED REGISTER S19
Format		AT [cmds] S19=n [cmds]
Range:		0-255
Unit:		Bit-mapped
Description:		Selects synchronous/asynchronous mode, line type, clock source, and ITU-T/Bell modes.
Bit	Value	Function
0	0	Not used
1	0 1	BSC HDLC
2	0 1	Address detector authorized Address detector not authorized
3	0 1	NRZ1 NRZ
4	0 1	Mark idle Flag or sync idle
5-7	0	Not Used

BIT-MAPPED REGISTER S21
Format		AT [cmds] S21=n [cmds]
Range:		0-253
Unit:		Bit-mapped
Description:		Selects CTS/DCD/DSR signals, low DTR action, and the long space disconnect function.
Bit	Value	Function
0-1	0	Not used
2	0 1	CTS forced high CTS follows RTS
4, 3	0	Not used
5	0 1	DCD forced high DCD normal
6	0 1	DSR forced high DSR normal
7	0 1	Long space disconnect function disabled Long space disconnect function enabled

BIT-MAPPED REGISTER S22
Format		AT [cmds] S22=n [cmds]
Range:		0-255
Unit:		Bit-mapped
Description:		Controls speaker volume and controls, limits results codes, and pulse dial make/break ratio.
Bit	Value	Function
1, 0	00 01 10 11	Low level volume Low level volume Medium level volume High level volume
3, 2	00 01 10 11	Speaker off Speaker off on carrier Speaker always on Speaker on during handshake
6 - 4	000 100 101 110 111	Basic result codes only enabled Basic and connection speed result codes enabled Basic and connection speed result codes and dialtone detection enabled All result codes except dialtone detection enabled All result codes enabled
7	0	Not used

BIT-MAPPED REGISTER S23
Format		AT [cmds] S23=n [cmds]
Range:		0-189
Unit:		Bit-mapped
Description:		Grants/denies remote digital loopback, controls DTE rate and parity, and sets guard tone.
Bit	Value	Function
0	0 1	Remote digital loopback denied Remote digital loopback allowed
3 - 1	000 001 010 011 100 101 110 111	Sets serial port speed to 0-300bps Sets serial port speed to 600bps Sets serial port speed to 1200bps Sets serial port speed to 2400bps Sets serial port speed to 4800bps Sets serial port speed to 9600bps Sets serial port speed to 19200bps Sets serial port speed to >19200bps
5, 4	00 01 10 11	Parity even Not used Parity odd Mark or No Parity
7, 6	00 01 10	Guard tone disabled Guard tone disabled Guard tone 1800Hz enabled

BIT-MAPPED REGISTER S27
Format		AT [cmds] S27=n [cmds]
Range:		0-111
Unit:		Bit-mapped
Description:		Selects synchronous/asynchronous mode, line type, clock source, and ITU-T/Bell modes.
Bit	Value	Function
1, 0, 3	00 01 10 11	Asynchronous mode, serial port speed follows connect speed Asynchronous off-line command mode and synchronous connect mode Asynchronous off-line command mode; modem autodials first number in directory, then synchronous connect mode Asynchronous off-line command mode on low DTR, synchronous connect mode on high DTR
2	0	Not Used
5, 4	00 01 10	Local modem generates transmit clock source Local DTE generates transmit clock source Impulse loop
6	0 1	ITU/T mode Bell mode
7	0	Not Used

BIT-MAPPED REGISTER S28
Format		AT [cmds] S28=n [cmds]
Range:		0-31
Unit:		Bit-mapped
Description:		Controls V.23 split speed, transmit/receive speed, half duplex; and pulse dialing.
Bit	Value	Function
0	0 1	V.23 split speed operation disabled V.23 split speed operation enabled
1	0 1	75bps transmit, 1200bps receive enabled 1200bps transmit, 75bps receive enabled
2	0 1	V.23 half-duplex disabled 1200bps transmit, 1200bps receive enabled
3-7	0	Not used

BIT-MAPPED REGISTER S41
Format		AT [cmds] S41=n [cmds]
Range:		0-31
Unit:		Bit-mapped
Description:		Selects compression, auto-retrain, flow control, and MNP mode.
Bit	Value	Function
1 - 0	00 01 10 11	Data compression disabled MNP5 enabled V.42bis enabled MNP5 and V.42bis enabled
2	0 1	Automatic retrain enabled Automatic retrain disabled
3	0 1	Flow control disabled Flow control enabled
4	0 1	Stream mode for MNP Block mode for MNP
5-7	0	Not Used

BIT-MAPPED REGISTER S80
Format		AT [cmds] S80=n [cmds]
Range:		0-255
Unit:		Bit-mapped
Description:		Selects password protect, command switch
Bit	Value	Function
0-4	0	Not used
5	0 1	AT command set V.25bis command set
6	0 1	Remote configuration enabled Remote configuration disabled
7	0 1	Automatic callback not protected by password Automatic callback protected by password

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	Expedited signaling, immediately send timed break
S82=7	Destructive signaling, buffers cleared, immediately send timed break
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

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
S37=0	Automatic speed recognition
S37=1	300bps
S37=2	300bps
S37=3	300bps
S37=5	1200bps
S37=6	2400bps
S37=7	V.23
S37=8	4800bps
S37=9	9600bps
S37=10	12.0Kbps
S37=11	14.4Kbps
S37=12	7200bps

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.
S36=7	Attempt a connection at MNP2-4; if that fails, attempt a buffered connection.

ERROR CORRECTION/COMPRESSION
Type:			Register
Format:	AT [cmds] S46=n [cmds]
Description:	Selects active error correction and compression protocols
Command		Function
S46=136		LAP-M only, no compression
S46=138		LAP-M with V.42bis data compression

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
S48=7		Detection negotiation and XID negotiation enabled
S48=128		Fall-back to options set in S36

FLOW CONTROL
Type:	Register
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	RTS/CTS & XON/XOFF flow control enabled

HDLC ADDRESS/BSC SYNCHRONOUS CHARACTER
Type:	Register
Format	AT [cmds] S20=n [cmds]
Default:	0
Range:	0-255
Unit:	Unidentified
Description:	Sets the HDLC address/BSC sychronous character