Card Type	Modem (asynchronous)
Chip Set	Unidentified
Maximum Modem Rate	14.4KbpS
Maximum Fax Rate	14.4Kbps
Data Modulation Protocol	Bell 103J/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis
Fax Modulation Protocol	ITU-T V.17, V.29, V.27ter
Error Correction/Compression	V.42, V.42bis, MNP5
Fax Class	Class I & II
Data Bus	External

CONNECTIONS
Function	Label		Function		Label
DC power		CN1		Line in		CN4
RS-232/422		CN2		Power switch		SW1
Line out		CN3

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
RD	Unidentified	On	Modem is receiving data
RD	Unidentified	Off	Modem is not receiving data
SD	Unidentified	On	Modem is transmitting data
SD	Unidentified	Off	Modem is not transmitting data
CD	Unidentified	On	Carrier signal detected
CD	Unidentified	Off	Carrier signal not detected
OH	Unidentified	On	Modem is off-hook
OH	Unidentified	Off	Modem is on-hook
TR	Unidentified	On	DTR signal is high
TR	Unidentified	Off	DTR signal is low
EC	Unidentified	On	Error correction enabled
EC	Unidentified	Off	Error correction disabled
HS	Unidentified	On	Modem is in high speed mode
HS	Unidentified	Off	Modem is not in high speed mode
MR	Unidentified	On	Power is on
MR	Unidentified	Off	Power is off

SUPPORTED COMMAND SET

Basic AT Commands

AT, ‘+++’, A/

A, E, H, P, T, Y

&G, &W, &X, &Y, &Z

Extended AT Commands

\G, \K, \X

%A

S Registers

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

Note: See MHI Help File for full command documentation.

COMMUNICATION PROTOCOLS
Type:	Configuration
Format:	AT [cmds] Bn [cmds]
Description:	Selects the communication protocol for data calls
Note: The B command allows the simultaneous selection of more than one suffix, enabling multiple protocols.
Command	Protocol
B0	ITU-T V.22 at 300 or 1200bps
B1	Bell 212A at 300 or 1200bps
B2	V.23 at 75/1200bps
B3	V.23 at 1200/75bps

COMMUNICATIONS MODE
Type:	Configuration
Format:	AT [cmds] &Mn [cmds]
Description:	Selects communications mode
Command	Mode
í &M0	Asynchronous mode
&M1	Synchronous mode with AT command protocol dialing
&M2	Synchronous mode with DTR dialing method
&M3	Synchronous mode with AT command protocol dialing

COMMUNICATIONS MODE
Type:	Configuration
Format:	AT [cmds] &Qn [cmds]
Description:	Selects communications mode
Command	Mode
í &Q0	Asynchronous mode
&Q1	Synchronous mode with AT command protocol dialing
&Q2	Synchronous mode with DTR dialing method
&Q3	Synchronous mode with AT command protocol dialing

CONFIGURATION PROFILES
Type:	Immediate
Format:	AT [cmds] &V [cmds]
Description:	Displays active and stored configuration profiles
Command	Function
&V0	Display current configuration options in active memory
&V1	Display configuration options stored in memory area specified by &Y command
&V1n	Display a continuous scroll of the view commend. (n= 0 for &V0, 1 for &V1, 2 for &V2, 3 for &V3, and 4 for &V4)
&V2	Display configuration options stored in user profile 0
&V3	Display configuration options stored in used profile 1
&V4	Display telephone numbers stored in directory locations 1 and 2
&V8	Display modem’s status information for troubleshooting

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 forced on, turns off momentarily when disconnected
&C3	Follows DTR
&C4	Simulated Control Carrier
&C5	Follows DTR, turns off upon disconnect

DATA SET READY (DSR)
Type:	Configuration
Format:	AT [cmds] &Sn [cmds]
Description:	Selects DSR options
Command	Function
&S0	DSR forced high
í &S1	DSR high only while modem is handshaking or connected
&S2	DSR high only while modem is connected
&S3	Follows DTR
&S4	On early (when data command is entered)
&S5	Delay until Data mode is entered

DATA TERMINAL READY (DTR)
Type:	Configuration
Format:	AT [cmds] &Dn [cmds]
Description:	Selects modem response to DTR
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
&D4	Modem does not disconnect from the call until the computer turns DTR off reguardless of how the remote modem disconnects the call (see S25)

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.

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
&F0	Load factory configuration options into active memory
&F5	Load the ETC protocol (cellular phone line)
&F6	Load the ETC protocol (normal phone line)

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	Return to on-line data mode
O1	Forces modem from online command mode to data mode

PULSE DIALING RATIO
Type:	Configuration
Format:	AT [cmds] &Pn [cmds]
Description:	Selects pulse dial make/break ratio
Command	Function
í &P0	39/61ms at 10pps (North America)
&P1	33/67ms at 10pps (Europe)

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays information requested
Command	Function
I0	Displays the product code
I1	Displays the ROM checksum
I2	Performs and EEPROM check
I3	Displays serial number and AT&T Paradyne
I4	Displays alphanumeric modem number
I5	Displays circuit card part number
I6	Displays software part number
I9	Displays firmware revision number
I10	Allows the value of 10 to be changed to 144 (I10=0), 240 (I10=1), 480 (I10=2), 960 (I10=3), or 120 (I10=4)
I11	Displays a ROM checksum in a hexadecimal format
I17	Displays last fatal error recorded
I19	Displays firmware revision number in an alphanumeric format

RESULT CODE FORMAT
Type:	Configuration
Format:	AT [cmds] Vn [cmds]
Description:	Selects word or numeric format for information-text and result codes
Command	Function
V0	Numeric format enabled (numbers 1)
í V1	Verbose (word) format enabled
V2	Numeric format enabled (numbers 2)

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	Result code sending enabled in Originate mode

RTS/CTS
Type:	Configuration
Format:	AT [cmds] &Rn [cmds]
Description:	Selects RTS/CTS options
Command	Function
í &R0	Standard RS-232 operation: RTS must be on for the computer to transmit to the modem
&R1	Ignore
&R2	Simulated Control Carrier

SELECT CALL PROGRESS RESULT CODES
Type:	Configuration
Format:	AT [cmds] Xn [cmds]
Description:	Enables selection of tone detection and associated result code format options
Command	Function
X0	Busy and dial tone detection disabled; result codes 0 - 4 enabled.
X1	Busy and dial tone detection disabled; result codes 0 - 5 & 10 enabled.
X2	Busy tone detection disabled, dial tone detection enabled; result codes 0 - 6 & 10 enabled.
X3	Busy tone detection enabled, dial tone detection disabled; result codes 0 - 5, 7 & 10 enabled.
í X4	Busy and dial tone detection enabled; result codes 0 - 7 & 10 enabled.
X5	Adds error control suffix (REL) to extended result codes 20-27 if error control is used, enabled dial tone detect and busy tone detect
X6	Add either V.42 or MNP suffix to extended result codes 20-27 if data compression is used, enable dial tone detect and busy signal detect
X7	Computer’s data rate appears in the connect message instead of the telephone line data rate, enables dial tone detect and busy tone detect

SOFT RESET
Type:	Immediate
Format:	AT [cmds] Zn [cmds]
Description:	Restores modem profiles previously saved in non-volatile RAM using the &W command.
Command	Function
Z0	Restore setting 0
Z1	Restore setting 1
Z3	Performs a reset and loads storage area specified by &Y into Active

SPEAKER MODE
Type:	Configuration
Format:	AT [cmds] Mn [cmds]
Description:	Selects various speaker options
Command	Function
M0	Speaker disabled
í M1	Speaker enabled until carrier signal detected
M2	Speaker enabled

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

TEST MODES
Type:	Immediate
Format:	AT [cmds] &Tn
Description:	Selects test options
Command	Function
&T0	End current test
&T1	Begin local analog loopback test
&T2	Pattern test
&T3	Begin local digital loopback
&T4	Grant remote digital loopback request
&T5	Deny remote digital loopback request
&T6	Request remote digital loopback
&T7	Request remote digital loopback and self-test
&T8	Begin local analog loopback and self-test
&T9	Self test

TRANSMIT LEVEL
Type:	Configuration
Format:	AT [cmds] &In [cmds]
Description:	Determins the transmit level for data over dial lines. (-10 - -25dBm)

TRANSMIT MODE
Type:	Configuration
Format:	AT [cmds] &Jn [cmds]
Description:	Controls the transmit mode
Command	Jack Type
í &J0	Permissive mode

COMPRESSION
Type:	Configuration
Format:	AT [cmds] %Cn [cmds]
Description:	Selects data compression
Command	Function
%C0	Disable V.42bis and MNP 5 data compression
%C1	Enable V.42bis and MNP 5 data compression

CONNECT MODE
Type:	Configuration
Format:	AT [cmds] \Nn [cmds]
Description:	Controls the type of connection the modem will operate in
Command	Function
\N0	Buffer mode
\N1	Direct mode
\N2	MNP or disconnect
\N3	MNP or buffer
\N4	LAPM of disconnect (cellular setting)
\N5	LAPM or buffer
\N6	V.42.MNP or disconnect
í \N7	V.42/MNP or buffer

CTS CONTROL
Type:	Configuration
Format:	AT [cmds] \Dn [cmds]
Description:	Determines the hanling of the Clear To Send signal
Command	Function
\D0	Forced on
\D1	Follows standard RS-232 operation: CTS follows DTS
\D2	Forced on, but turns off momentarily when disconnected
\D3	Follow state of DTR signal

DATABURST CONTROL
Type:	Configuration
Format:	AT [cmds] %Van [cmds]
Description:	Databurst control
Command		Function
%VA0		Disable
%VA1		Enable

ERROR CONTROL NEGOTIATION BUFFER
Type:	Configuration
Format:	AT [cmds] \Cn [cmds]
Description:	Determines wether the modem buffers data durring error control negotiation
Command	Function
\C0	Disabled
\C1	Enabled
\C2	Disabled, enable upon fallback

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] \Qn [cmds]
Description:	Sets type of flow control used by modem
DTE
Command	Function
\Q0, \Q4, \Q5, \Q6	Disable
\Q1	XON/XOFF
\Q2, \Q3	CTS to DTE
DCE
Command	Function
\Q0, \Q2, \Q4	Disable
\Q1, \Q5	XON/XOFF
\Q3, \Q6	RTS to DCE

INACTIVITY TIMER
Type:	Configuration
Format:	AT [cmds] \Tn [cmds]
Default:	0
Range:	0-255
Unit:	1 second
Description:	Sets the length of time that the modem does not receive information before it disconnects. 0 disables.

MAXIMUM BLOCK SIZE FOR TRANSMISSION
Type:	Configuration
Format:	AT [cmds] \An [cmds]
Description:	Sets the maximum transmittable block size
Command	Function
\A0	MNP block size is 64 characters
\A1	MNP block size is 128 characters
\A2	MNP block size is 192 characters
\A3	MNP block size is 256 characters
\A4	MNP block size is 32 characters
\A5	MNP block size is 16 characters

MODULATION/DATA RATE
Type:	Configuration
Format:	AT [cmds] %Bn [cmds]
Description:	Controls the modulation/data rate
Command	Function
%B300	V.21 or Bell 103 @ 300bps
%B1200	V.22, V.23 or Bell 212A @ 1200bps
%B2400	V.22bis @ 2400bps
%B4800	V.32bis/V.32 @ 4800bps
%B7200	V.32bis @ 7200bps
%B9600	V.32bis/V.32 @ 9600bps
%B12000	V.32bis @ 12,000bps
%B14400	V.32bis @ 14,400bps

VOICESPAN
Type:	Configuration
Format:	AT [cmds] %VFn [cmds]
Description:	Controls voicespan defaults

VOICESPAN AUDIO VOLUME
Type:	Immediate
Format:	AT [cmds] %VG [cmds]
Range:	0 (lowest) - 9 (highest)
Description:	Returns a value which indicates the received line signal level

VOICESPAN DATA MODE
Type:	Immediate
Format:	AT [cmds] %VH [cmds]
Description:	Controls the voicespan data mode
Command	Function
%VH0	Audio and data
%VH1	Data only

VOICESPAN SPEAKER RING VOLUME
Type:	Immediate
Format:	AT [cmds] %VL [cmds]
Description:	Controls the voicespan speaker ring volume
Command	Function
%VL0	Disable
%VL1	Low
%VL2	Medium
%VL3	High

VOICESPAN TOGGLE
Type:	Immediate
Format:	AT [cmds] %VS [cmds]
Description:	Disables the voicespan
Command	Function
%VS0	Disable
%VS1	Enable

ADDITIONAL RINGS TO ANSWER
Type:		Register
Format:	AT [cmds] S62=n [cmds]
Range:	0 - 255 (0 = disable)
Description:	Specifies the number of rings to be sent to the local telephone before a RING message is sent to the computer

AT COMMAND MODE
Type:			Register
Format:	AT [cmds] S84=n [cmds]
Description:	Determines how the modem responds to valid and invalid AT commands
Command		Function
í S84=0		Normal
S84=1		ERROR result code is not issued in response to invalid commands
S84=2		All invalid commands and all commands that alter configuration options are ignored

BUFFER DISCONNECT DELAY
Type:			Register
Format:	AT [cmds] S49=n [cmds]
Description:	Sets how long the modem waits to disconnect after it has received a disconnect command.
Command		Function
S49=0		Disable

CELLULAR ENHANCEMENTS
Type		Register or Configuration
Format		AT [cmds] S91=n [cmds]
Description		This is part of the ETC protocol and is enabled when the modem is configured using AT&F5 or AT&F6 commands.
Command	Function
í S91=1	Disable
S91=2	Enable

DIAL LINE RATE
Format		AT [cmds] S41=n [cmds]
Default:		0,1
Range:		0 - 13
Description:		Sets the protocol and rate.
Bit	Value	Function
1 - 0	14,400	V.32bis
2	12,000	V.32bis
3	9600	V.32bis/V.32
4	7200	V.32bis
5	4800	V.32bis/V.32
6	2400	V.22bis
7	1200	V.22
8	1200	Bell 212A
10	0-300	V.21
11	0-300	Bell 103J
12	1200/75	V.23
13	75/1200	V.23

DTE RATE = VF RATE
Type:		Register
Format:		AT [cmds] S90=n [cmds]
Description:		Automatically adjusts the computer’s rate to equal the dial-line rate
Command	Function
í S90=1	Disable
S90=2	Enable

DTMF TONE OFF TIMER
Format:	AT [cmds] S13=n [cmds]
Default:	70
Range:	50 - 255
Description:	Controls the duration of the wait between DTMF tones

FAST DISCONNECT
Type:			Register
Format:	AT [cmds] S85=n [cmds]
Description:	Determines whether the modem instantly goes on-hook in response to a disconnect command.
Command		Function
í S85=0		Disable
S85=1		Enable

HARDWARE BYPASS CONTROL
Type:			Register
Format:	AT [cmds] S67=n [cmds]
Description:	Determines under what conditions the modem will turn on or off hardware bypass control.
Command		Function
í S67=0		Disable
S67=1		Bypass if DTR drops
S67=2		Bypass until modem goes off hook

LINE CURRENT DISCONNECT
Type:			Register
Format:	AT [cmds] S65=n [cmds]
Description:	Enables line current disconnects
Command		Function
í S65=0		Disconnect after 8 milliseconds
S65=1		Disconnect after 90 milliseconds
S65=2		Disable

MAXIMUM RATE IN DATA-ONLY MODE
Type:			Register
Format:	AT [cmds] S61=n [cmds]
Description:	Sets the data rate used when in data-only mode
Command		Function
í S61=0		14,400bps
S61=1		12,000bps
S61=2		9600bps
S61=3		7200bps
S61=7		4800bps

RI FOLLOWS LOCAL PHONE
Type:			Register
Format:	AT [cmds] S68=n [cmds]
Description:	Determines whether the RI signal indicates the hookswitch status of the telephone connected to the Voice Interface Port.
Command		Function
í S68=0		Disable
S68=1		Enable

V.17 FAX DISABLE
Type:			Register
Format:	AT [cmds] S79=n [cmds]
Description:	Enables the V.17 fax functionality.
Command		Function
í S79=0		Disable
S79=1		Enable

V.32bis AUTOMODE FOR DIAL-LINE OPERATION
Type:			Register
Format:	AT [cmds] S78=n [cmds]
Description:	Determines whether the modem can connect using a modulation scheme other than that specified by S41.
Command		Function
í S78=0		Enable
S78=1		Disable

V.32bis AUTORATE FOR DIAL-LINE OPERATION
Type:			Register
Format:	AT [cmds] S76=n [cmds]
Description:	Determines whether the modem can adjust line rate according to the line conditions
Command		Function
í S76=0		Enable
S76=1		Disable
S76=2		4800bps
S76=3		9600bps

V.32bis TRAIN
Type:			Register
Format:	AT [cmds] S43=n [cmds]
Description:	Sets the duration of the V.32 handshaking sequence.
Command		Function
í S43=0		Long
S43=1		Short

V.42 ARQ WINDOW SIZE INCREASE
Type:		Register
Format		AT [cmds] S89=n [cmds]
Description:		Sets the V.42 ARQ window size to a value of six to fifteen frames.
Command	Function
S89=0	6 frames
í S89=1	7 frames
S89=2	8 frames
S89=3	9 frames
S89=4	10 frames
S89=5	11 frames
S89=6	12 frames
S89=7	13 frames
S89=8	14 frames
S89=9	15 frames (cellular setting)
S89>9	9 frames

VOICESPAN CALL DISCRIMINATE
Type:			Register
Format:	AT [cmds] S63=n [cmds]
Description:	Determines wheter to use the modulation indicated by the calling tone.
Command		Function
í S63=0		Disable
S63=1		Enable

VOICESPAN DISCRIMINATE TIMEOUT
Type:		Register
Format:	AT [cmds] S64=n [cmds]
Range:	0 - 255
Description:	Determines how long call discrimination can be tried before the default modulation is used.

VOICESPAN FAST TRAIN
Type:			Register
Format:	AT [cmds] S75=n [cmds]
Description:	Enables fast training when running voicespan
Command		Function
í S75=0		Enable
S75=1		Disable

VOICESPAN PHONE RING COUNT
Type:			Register
Format:	AT [cmds] S66=n [cmds]
Range:	0 - 254
Description:	Sets the maximum number of rings used to alert the user to an impending voicespan session.
Command		Function
í S66=0		Disable