Card Type	Fax, Modem (synchronous/asynchronous)
Chip Set	Unidentified
Maximum Data Rate	9600bps
Data Bus	External
Data Modulation Protocol	Bell 103/212A ITU-T V.21, V.22, V.22bis, V.23, V.32
Error Correction/Compression	Adaptive data compression, V-series LAPB, MNP5, V.42, V.42bis, X.25

CONNECTIONS
Function	Label		Function		Label
Line in		CN1		DC power		CN4
Line out		CN2		Power switch		SW2
RS-232/422		CN3

COMMAND SET SELECTION
Setting	SW1/C	SW1/D
AT commands only	Up	Up
Asynchronous V.25bis	Up	Down
Synchronous V.25bis HDLC framing	Down	Up
Synchronous V.25bis Character framing	Down	Down
Note: Our normal convention for switches is On/Off, this document will use Up/Down.

USER CONFIGURABLE SETTINGS
Setting	Label	Position
Command recognition enabled/smart mode	SW1/A	Up
Command recognition disabled/dumb mode	SW1/A	Down
Carrier signal adjustment disabled	SW1/B	Up
Carrier signal adjustment enabled	SW1/B	Down
Note: Our normal convention for switches is On/Off, this document will use Up/Down.

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
HS	Red	On	Modem is operating at 4800bps or faster
HS	Red	Off	Modem is operating at slower than 4800bps
AA	Red	On	Auto-answer enabled/ring indicated when Auto-answer disabled
AA	Red	Off	Auto-answer disabled/ring indicated when Auto-answer enabled
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
MR	Red	Blinking	Self-test or diagnostic 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
P	Pulse dialing enabled
R	Answer mode enabled, originate mode disabled following handshake initiation.
S=n	Dial stored telephone number n
T	Tone dialing enabled
W	Dialing resumed following dial tone detection
,	Dialing paused for amount of time specified in S8 register
!	Modem commanded to go off-hook for specified time before returning on-hook.
@	Wait for quiet answer
;	Modem returned to command state after dialing

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

BUFFER SIZE - LOWER LIMIT
Type:	Register
Format:	AT [cmds] S49=n [cmds]
Default:	8
Range:	1-249
Unit:	1 byte
Description:	Controls the low-end size of the buffer during error-control or auto-speed buffering mode

BUFFER SIZE - UPPER LIMIT
Type:	Register
Format:	AT [cmds] S50=n [cmds]
Default:	16
Range:	2-250
Unit:	1 byte
Description:	Controls the high-end size of the buffer during error-control or auto-speed buffering mode

LEASED LINE ATTENUATION LEVEL
Type	Register
Format	AT [cmds] S63=n [cmds]
Default	0
Range	0-15
Unit	-1 dBm
Description	Sets the power level for transmission over leased lines

FRAME LIMIT
Type	Register
Format	AT [cmds] S69=n [cmds]
Default:	15
Range:	0-15
Unit:	1 frame
Description:	Sets the maximum number of packets that may be sent without acknowledgment by the remote system.
Note:	LAPM connections use a maximum of 15 frames. LAPB and X.25 connections use a maximum of 8 frames.

FRAME RE-TRANSMISSION
Type	Register
Format	AT [cmds] S70=n [cmds]
Default:	10
Range:	0-255
Unit:	1 frame
Description:	Sets the limit for the number of re-transmissions the local modem attempts when an error-control mechanism detects frame transmission data errors. After the re-transmission limit has been reached, the modem initiates the hang-up process.

LINK LAYER TIMER
Type	Register
Format	AT [cmds] S71=n [cmds]
Default:	2
Range:	1-255
Unit:	.1 second
Description:	Sets the maximum duration the local modem waits for a response after sending the link layer. If no response is received within LINKLIMIT (see note), the local modem re-transmits the link layer.
Note:	The duration is determined according to the formula: LINKLIMIT = 2(maximum packet size + 11)(8 + line speed[bps]) + S71 + 500 ms

FLAG IDLE TIMER
Type	Register
Format	AT [cmds] S72=n [cmds]
Default:	30
Range:	1-255
Unit:	1 second
Description:	Sets the maximum duration the modem waits after detecting loss of both data and flag-idle signals. When the maximum duration is reached, the modem initiates the hang-up process. A value of 0 in S72 allows an indefinite wait.

DATA LOSS TIMER
Type	Register
Format	AT [cmds] S73=n [cmds]
Default:	5
Range:	1-255
Unit:	1 second
Description:	Sets the maximum duration the modem waits after detecting loss of data while receiving good carrier and flag idle signals. When the maximum duration is reached, the local modem sends a query to the remote modem to determine if it is operating properly. When the value calculated for QUERYLIMIT is reached (see note), the modem initiates the hang-up process.
Note:	The local modem will send the query several times according to the formula: QUERYLIMIT= 2(LINKLIMIT)(S73) seconds The value for LINKLIMIT is defined in S71.

ASU NEGOTIATION
Type	Register
Format	AT [cmds] S84=n [cmds]
Description:	Sets the Adaptive Start-Up (ASU) negotiation method
Command	Function
S84=0	ASU disabled
S84=128	Fixed startup
í S84=129	Both local and remote modems use fast startup
S84=130	Both local and remote modems use smooth startup
S84=131	Local modem uses fast startup, remote uses smooth startup
S84=132	Local modem uses smooth startup, remote uses fast startup

ASU NEGOTIATION REPORT
Type	Register
Format	AT [cmds] S85? [cmds]
Description:	Reports the Adaptive Start-Up (ASU) negotiation method
Value	Meaning
0	ASU disabled
128	Fixed startup
í 129	Both local and remote modems use fast startup
130	Both local and remote modems use smooth startup
131	Local modem uses fast startup, remote uses smooth startup
132	Local modem uses smooth startup, remote uses fast startup

MI/MIC
Type	Register
Format	AT [cmds] S92=n [cmds]
Description:	Controls the Mode Indicate/Mode Indicate Common (MI/MIC) interface.
Command	Function
í S92=0	MI/MIC disabled
S92=1	Level triggered, originate mode, ring indicator pulse enabled
S92=3	Edge triggered, originate mode, ring indicator pulse enabled
S92=5	Level triggered, answer mode, ring indicator pulse enabled
S92=7	Edge triggered, answer mode, ring indicator pulse enabled
S92=9	Level triggered, originate mode, ring indicator pulse disabled
S92=11	Edge triggered, originate mode, ring indicator pulse disabled
S92=13	Level triggered, answer mode, ring indicator pulse disabled
S92=15	Edge triggered, answer mode, ring indicator pulse disabled

V.25bis DTE SPEED
Type	Register
Format	AT [cmds] S93=n [cmds]
Description:	Sets the speed of the local serial port when in V.25bis mode.
Command	Function
S93=3	300bps
S93=5	1200bps
S93=6	2400bps
S93=7	4800bps
í S93=9	9600bps

COMMAND SET OPTIONS
Type		Register
Format		AT [cmds] S94=n [cmds]
Default:		0
Range:		0-15
Unit:		Bit-mapped
Description:		Sets various options for command set modes
Bit	Value	Function
1, 0	00 01 10 11	Use AT command set Use asynchronous V.25 command set Use synchronous V.25 command set with HDLC framing Use synchronous V.25 command set with character framing
2	0 1	Addressed calling Direct access calling
3	0 1	Use ASCII character set Use EBCDIC character set

PAD CONFIGURATION
Type:	Register
Format:	AT [cmds] S53=n [cmds]
Description:	Sets various options for the X.25 Packet Assembler/Disassembler.
Command		Function
S53=0		CCITT compatibility
S53=1		CCITT compatibility, display channel number before PAD prompt ( 1* )
í S53=2		Fixed user interface, PAD prompt hyphen ( - )
S53=3		Fixed user interface, display channel number before PAD prompt ( 1- )
S53=4		Fixed control interface, PAD prompt hyphen
S53=5		Fixed control interface, display channel number before PAD prompt
S53=6		Fixed user and fixed control interface, PAD prompt hyphen
S53=7		Fixed user and fixed control interface, display channel number before PAD prompt

MINIMUM INCOMING LCN
Type	Register
Format	AT [cmds] S74=n S75=n [cmds]
Default:	0 (S74), 0 (S75)
Range:	1-40 (S74), 1-99 (S75)
Unit:	None
Description:	These registers set the lowest Logical Channel Number (LCN) that the packet driver will attempt to answer calls on. The address itself may range from 0 - 4095.
Note:	The address is determined by the formula: ADDRESS = S74 * 100 + S75

MAXIMUM INCOMING LCN
Type	Register
Format	AT [cmds] S76=n S77=n [cmds]
Default:	40 (S76), 95 (S77)
Range:	1-40 (S76), 1-99 (S77)
Unit:	None
Description:	These registers set the highest Logical Channel Number (LCN) that the packet driver will attempt to answer calls on. The address itself may range from 0 - 4095.
Note:	The address is determined by the formula: ADDRESS = S76 * 100 + S77

OUTGOING LCN
Type	Register
Format	AT [cmds] S78=n S79=n [cmds]
Default:	0 (S78), 16 (S79)
Range:	1-40 (S78), 1-99 (S79)
Unit:	None
Description:	These registers set the Logical Channel Number (LCN) that the packet driver will place calls on. The address itself may range from 0 - 4095.
Note:	The address is determined by the formula: ADDRESS = S78 * 100 + S79

RESTART REQUEST
Format	AT [cmds] S80=n [cmds]
Default:	1
Range:	0-255
Unit:	None
Description:	Sets the maximum number of retransmission requests

ACKNOWLEDGMENT WAIT TIMER
Type:	Register
Format	AT [cmds] S81=n [cmds]
Default:	18
Range:	0-255
Unit:	10 seconds
Description:	Maximum time the modem will wait for acknowledgment of a request for retransmission before it initiates recovery.