Card Type	Fax, Modem (synchronous/asynchronous)
Chip Set	Unidentified
Maximum Data Rate	28.8Kbps
Maximum Fax Rate	14.4Kbps
Data Bus	External
Fax Class	Class I & II
Data Modulation Protocol	ITU-T V.22, V.22bis, V.32, V.32bis, V.34 Rockwell V.FC
Fax Modulation Protocol	ITU-T V.17, V.29
Error Correction/Compression	MNP5, V.42, V.42bis

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

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
CD	Red	On	Carrier signal detected
CD	Red	Off	Carrier signal not detected
OH	Red	On	Modem is off-hook
OH	Red	Off	Modem is on-hook
RD	Red	On	Modem is receiving data
RD	Red	Off	Modem is not receiving data
SD	Red	On	Modem is transmitting data
SD	Red	Off	Modem is not transmitting data
TR	Red	On	DTR signal is high
TR	Red	Off	DTR signal is low
MR	Red	On	Power is on
MR	Red	Off	Power is off

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
%E2	Auto-fallback/fall-forward enabled

BIT-MAPPED REGISTER S14
Format:		AT [cmds] S14=n [cmds]
Default:		138
Range:		0-174
Unit:		Bit-mapped
Description:		Controls echo, result codes and display, dial mode, and answer/originate mode.
Bit	Value	Function
0	í 0	Not used
1	0 í 1	Command echo disabled Command echo enabled
2	í 0 1	Result codes enabled Result codes disabled
3	0 í 1	Display result codes in numeric format Display result codes in verbose format
4	í 0	Not used
5	í 0 1	Tone dial enabled Pulse dial enabled
6	í 0	Not used
7	0 í 1	Answer mode enabled Originate mode enabled

BIT-MAPPED REGISTER S21
Format		AT [cmds] S21=n [cmds]
Default:		52
Range:		0-253
Unit:		Bit-mapped
Description:		Selects jack type, CTS/DCD/DSR signals, low DTR action, and the long space disconnect function.
Bit	Value	Function
0	í 0 1	Selects RJ-11, RJ-41S, or RJ45S jack Selects RJ-12 or RJ-13 jack
1	í 0	Not used
2	0 í 1	CTS forced high CTS follows RTS
4, 3	00 01 í 10 11	DTR signal ignored Modem goes to command mode on low DTR Modem disconnects on low DTR; Auto-Answer is disabled. Modem is initialized on low DTR
5	0 í 1	DCD forced high DCD normal
6	í 0 1	DSR forced high DSR normal
7	í 0 1	Long space disconnect function disabled Long space disconnect function enabled

BIT-MAPPED REGISTER S22
Format		AT [cmds] S22=n [cmds]
Default:		117
Range:		0-127
Unit:		Bit-mapped
Description:		Controls speaker volume and controls, and limits results codes.
Bit	Value	Function
1, 0	00 í 01 10 11	Volume off Low level volume Medium level volume High level volume
3, 2	00 í 01 10 11	Speaker off Speaker off on carrier Speaker always on Speaker on during handshake
6 - 4	000 100 101 110 í 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

BIT-MAPPED REGISTER S23
Format		AT [cmds] S23=n [cmds]
Default:		61
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 í 1	Remote digital loopback denied Remote digital loopback allowed
3 - 1	000 001 010 011 100 101 í 110	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
5, 4	00 01 10 í 11	Parity even Not used Parity odd No Parity
6	í 0	Not used
7	í 0 1	Guard tone disabled Guard tone disabled

BIT-MAPPED REGISTER S27
Format		AT [cmds] S27=n [cmds]
Default:		73
Range:		0-111
Unit:		Bit-mapped
Description:		Selects synchronous/asynchronous mode, line type, clock source, and ITU-T/Bell modes.
Bit	Value	Function
3, 1, 0	000 001 010 011 100 í 101 111	Asynchronous mode, serial port speed follows connect speed Asynchronous off-line command mode and synchronous connect mode Asynchronous off-line command mode; modem auto-dials first number in directory, then synchronous connect mode Asynchronous off-line command mode on low DTR, synchronous connect mode on high DTR Not used Error correction mode Buffered asynchronous mode
2	í 0 1	Switched line Leased line
5, 4	í 00 01 10	Local modem generates transmit clock source Local DTE generates transmit clock source Remote DCE/DTE generates transmit clock source
6	í 0 1	ITU/T mode Bell mode

BIT-MAPPED REGISTER S28
Format		AT [cmds] S28=n [cmds]
Default:		0
Range:		0-24
Unit:		Bit-mapped
Description:		Controls pulse dialing.
Note:		AT&P returns ‘OK’ if valid, S28=0 should be set at all times.
Bit	Value	Function
2 - 0	í 000	Not used
4, 3	í 00 01 10 11	39ms make/61ms break at 10pps 33ms make/67ms break at 10pps 39ms make/61ms break at 20pps 33ms make/67ms break at 20pps

BIT-MAPPED REGISTER S31
Format:		AT [cmds] S31=n [cmds]
Default:		194
Range:		0-10
Description:		Select automode and extended result code format.
Bit	Value		Function
0	í 0		Not used
1	0 í 1		Auto-mode detection disabled In originate mode, handshake begins at line speed designated by the S37 register. Modem can shift to a slower speed if necessary. In answer mode, handshake attempted with the following protocols in order - V.FC, V.32bis, V.32, V.22bis, V.22 or Bell 212, V.21, and Bell 103
3, 2	í 00 01 10		Enables CONNECT result codes to report DTE speed Full reporting of CONNECT result codes Enables CONNECT result codes to report DCE speed
7 - 4	í 1100		Not used

BIT-MAPPED REGISTER S40
Format		AT [cmds] S40=n [cmds]
Default:		105
Range:		0-233
Unit:		Bit-mapped
Description:		Controls break handling, and block size.
Bit	Value	Function
2 - 0	í 001	Not used
5, 4, 3	000 001 010 011 100 í 101	\K0 \K1 \K2 \K3 \K4 \K5
7, 6	00 í 01 10 11	MNP block size is 64 characters MNP block size is 128 characters MNP block size is 192 characters MNP block size is 256 characters

BIT-MAPPED REGISTER S41
Format		AT [cmds] S41=n [cmds]
Default:		3
Range:		0-91
Unit:		Bit-mapped
Description:		Selects compression, auto-retrain and auto-fallback/fall-forward, flow control, and MNP mode.
Bit	Value	Function
1 - 0	00 01 10 í 11	Data compression disabled MNP5 enabled V.42bis enabled MNP5 and V.42bis enabled
6, 2	í 00 01 10	Auto-retrain disabled Auto-retrain enabled Auto-fallback/fall-forward enabled
3	í 0 1	Flow control disabled Flow control enabled
4	í 0 1	Stream mode for MNP Block mode for MNP

BREAK SEND
Type:	Configuration
Format:	AT [cmds] \Bn [cmds]
Default:	3
Range:	1-9
Unit:	.1 second
Description:	Sends break to modem

BREAK TYPE
Type:		Configuration
Format:		AT [cmds] \Kn [cmds]
Description:		Configures action of break signal
Command	Break from DTE		Modem receives \B	Break received from remote modem
\K0	Online command mode enabled, send no break to remote modem		Break sent to remote modem and buffers cleared	Buffers cleared, break sent to DTE
\K1	Break sent to remote modem and buffers cleared		Break sent to remote modem and buffers cleared	Buffers cleared, break sent to DTE
\K2	Online command mode enabled, send no break to remote modem		Send break to remote modem immediately	Break sent immediately to DTE
\K3	Send break to remote modem immediately		Send break to remote modem immediately	Break sent immediately to DTE
\K4	Online command mode enabled, send no break to remote modem		Send break with transmitted data	Break sent with received data to the DTE
í \K5	Send break with transmitted data		Send break with transmitted data	Break sent with received data to the DTE

COMPRESSION
Type:	Configuration
Format:	AT [cmds] %Cn [cmds]
Description:	Selects data compression
Command	Function
%C0	Data compression disabled
%C1	MNP5 enabled
%C2	V.42bis enabled
í %C3	MNP5 and V.42bis enabled

CONNECT MODE
Type:	Configuration
Format:	AT [cmds] \Nn [cmds]
Description:	Controls the type of connection the modem will operate in
Command	Function
\N0	Normal mode enabled
\N1	Direct mode enabled
\N2	Reliable mode enabled
\N3	Auto-reliable mode enabled
\N4	V.42 reliable mode enabled
\N5	MNP reliable mode enabled

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.
Modifier	Function
J	Link will be negotiated at highest possible speed
L	Re-dial last number
P	Pulse dialing enabled
R	Accepted but not acted upon
S=n	Dial stored telephone number n
T	Tone dialing enabled
W	Dialing resumed following dial tone detection
!	Modem commanded to go off-hook for specified time before returning on-hook.
@	Wait for quiet answer
,	Dialing paused for amount of time specified in S8 register
;	Modem returned to command state after dialing
^	Enable calling tone

FLASH DIAL MODIFIER TIME
Type:	Register
Format	AT [cmds] S29=n [cmds]
Default:	0
Range:	0-255
Unit:	.01 second
Description:	Time the modem will go on-hook upon receiving the ! dial modifier in dial string.

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] \Gn [cmds]
Description:	Selects modem port flow control
Command	Function
í \G0	Flow control disabled
\G1	Flow control enabled

FLOW CONTROL
Type:	Read-only Register
Format	AT [cmds] S39? [cmds]
Description:	Displays the current flow control
Value	Meaning
0	Flow control disabled
í 3	RTS/CTS flow control enabled
4	XON/XOFF flow control enabled
5	Transparent XON/XOFF flow control enabled
6	Both RTS/CTS and XON/XOFF flow control enabled

FLOW CONTROL CHARACTER - XOFF
Type:	Register
Format:	AT [cmds] S33=n [cmds]
Default:	19
Range:	0-255
Unit:	ASCII
Description:	Sets the character used to represent XOFF

FLOW CONTROL CHARACTER - XON
Type:	Register
Format:	AT [cmds] S32=n [cmds]
Default:	17
Range:	0-255
Unit:	ASCII
Description:	Sets the character used to represent XON

INACTIVITY TIMER
Type:	Register
Format	AT [cmds] S30=n [cmds]
Default:	0
Range:	0-255
Unit:	10 seconds
Description:	Maximum duration of DTE and DCE inactivity allowed prior to initiating hang-up process. S30=0 will disable timer.

LINE SIGNAL LEVEL
Type:	Immediate
Format:	AT [cmds] %L [cmds]
Description:	Returns a value which indicates the received line signal level (-dBm)

LINE SIGNAL QUALITY
Type:	Immediate
Format:	AT [cmds] %Q [cmds]
Description:	Returns a value which indicates line signal quality

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
í \A1	MNP block size is 128 characters
\A2	MNP block size is 192 characters
\A3	MNP block size is 256 characters

MNP - STREAM/BLOCK MODE
Type:	Configuration
Format:	AT [cmds] \Ln [cmds]
Description:	Selects the transfer mode for MNP link
Command	Function
í \L0	Stream mode for MNP enabled
\L1	Block mode for MNP 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 compares ROM checksum, reports ‘OK’.
I3	Reports modem model and firmware revision
I4	Reports modem identifier string
I5	Reports country code
I6	Reports modem series identifier string

TEST MODES
Type:		Register
Format:		AT [cmds] S16=n [cmds]
Default:		0
Range:		0-125
Unit:		Bit-mapped
Description:		Controls loopback tests: analog, digital, remote digital, and self tests.
Bit	Value	Function
0	í 0 1	Local analog loopback not in progress Local analog loopback in progress
1	í 0	Not used
2	í 0 1	Local digital loopback not in progress Local digital loopback in progress
3	í 0 1	Modem not in remote digital loopback Remote digital loopback in progress
4	í 0 1	Remote digital loopback not requested Remote digital loopback requested
5	í 0 1	Remote digital loopback w/ self-test not in progress Remote digital loopback w/ self-test in progress
6	í 0 1	Local analog loopback w/ self-test not in progress Local analog loopback w/ self-test in progress