MT2834ECT4/MT2834ECT4I Motherboard Settings and Configuration

Modem Type	Data (synchronous/asynchronous)/Fax/Voice
NIC Type	Ethernet
Processor	80486SLC
Maximum Modem Transfer Rate	28.8Kbps
Maximum Fax Transfer Rate	14.4Kbps
Maximum NIC Transfer Rate	10Mbps
Processor Speed	25MHz
Data Bus	N/A (see technical note)
Topology	Linear Bus/Star
Fax Class	Class I & II
Wiring Type	Unshielded twisted pair RG-58A/U 50ohm coaxial
Data Modulation Protocol	Bell 103A/212A ITU-T V.22, V.22bis, V.32, V.32bis, V.34
Fax Modulation Protocol	ITU-T V.17, V.27ter, V.29
Error Correction/Compression	MNP5, V.42, V.42bis
Boot ROM	Available
Max. Onboard DRAM	16MB

CONNECTIONS
Purpose	Location	Purpose	Location
Daughterboard connectors	CN1 & CN1A	Keyboard	CN6
Line out	CN2	VGA video out	CN7
RG-58A/U 50ohm coaxial	CN3	Power	CN8
Unshielded twisted pair	CN4	Flash BIOS for modem	FLASH
Serial port	CN5	Power switch	SW1

CABLE TYPE SELECTION
» Cable Type		JP2
»	RG-58A/U 50ohm coaxial	Pins 1 & 2 closed
»	Unshielded twisted pair	Pins 2 & 3 closed

LOSS OF CARRIER REBOOT CONFIGURATION
» Setting		JP1
»	Modem will not reboot on loss of carrier	Open
»	Modem will reboot on loss of carrier	Closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
2MB	(2) 1M x 9	NONE
4MB	(2) 1M x 9	(2) 1M x 9
8MB	(2) 4M x 9	NONE
16MB	(2) 4M x 9	(2) 4M x 9

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
SD	Red	On	Modem is transmitting on phone line
SD	Red	Off	Modem is not transmitting on phone line
RD	Red	On	Modem is receiving on phone line
RD	Red	Off	Modem is not receiving on phone line
CD	Red	On	Carrier signal detected
CD	Red	Off	Carrier signal not detected
28	Red	On	Modem connected at 28.8Kbps
28	Red	Off	Modem not connected at 28.8Kbps
14	Red	On	Modem connected at 14.4Kbps
14	Red	Off	Modem not connected at 14.4Kbps
96	Red	On	Modem connected at 9600bps
96	Red	Off	Modem not connected at 9600bps
OH	Red	On	Modem is off-hook
OH	Red	Off	Modem is on-hook
TR	Red	On	DTR signal is high
TR	Red	Off	DTR signal is low

DIAGNOSTIC LED(S) (CON’T)
EC	Red	On	Modem connected with error correction
EC	Red	Off	Modem not connected with error correction
EC	Red	Blinking	Modem connected with error correction/compression
FX	Red	On	Modem is connected in FAX mode
FX	Red	Off	Modem is not connected in FAX mode
PWR	Red	On	Power is on
PWR	Red	Off	Power is not on
TP	Red	On	RG-58A/U port active
TP	Red	Off	UTP port active
LNK	Yellow	On	RG-58A/U link is good
LNK	Yellow	Off	RG-58A/U link is not good
RX	Red	On	Modem is receiving on network
RX	Red	Off	Modem is not receiving on network
TX	Red	On	Modem is transmitting on network
TX	Red	Off	Modem is not transmitting on network

MISCELLANEOUS TECHNICAL NOTE

This is a standalone network modem, designed to let other workstations share this modem and an additional one connected to the serial port.

AUTO-RELIABLE TIME BUFFER CONFIGURATION
Type:		Configuration
	Format:	AT [cmds] $A n [cmds]
	Example:	AT $A1 &W <CR>
	Description:	Controls the handling of incoming data during auto-reliable time period.
»	Command	Function
»	$A0	Data is discarded.
»	$A1	Data is buffered.

BIT MODE
Type:		Configuration
	Format:	AT [cmds] $EB n [cmds]
	Example:	AT $EB1 E1 <CR>
	Description:	Selects 10- or 11-bit mode.
»	Command	Function
»	$EB0	Sets 10-bit mode.
»	$EB1	Sets 11-bit mode.

CALLBACK PARITY
Type:		Configuration
	Format:	AT [cmds] #P n [cmds]
	Example:	AT #P0 #DB1 <CR>
	Description:	Sets the parity of the modem when in callback mode.
»	Command	Function
»	#P0	No parity.
»	#P1	Odd parity.
»	#P2	Even parity.

CALLBACK PASSWORD
Type:	Configuration
Format:	AT [cmds] #CBN nnxxxx
Example:	AT#DB2 #CBN09snarf <CR>
Description:	Sets the callback password at memory location nn to xxxx . The password must be between 6 and 10 characters, inclusive.

CALLBACK SECURITY
Type:		Configuration
	Format:	AT [cmds] #DB n [cmds]
	Example:	AT #DB1 S0=1 <CR>
	Description:	Sets the security level of the callback function.
»	Command	Function
»	#DB0	Disables security and clears callback memory.
»	#DB1	Enables remote security only.
»	#DB2	Enables local and remote security.

CALLER ID INFORMATION TRANSMISSION
Type:		Configuration
	Format:	AT [cmds] &A n [cmds]
	Example:	AT &A1 <CR>
	Description:	Controls the transmission of Caller ID information stored in the EPROM. The ID must be inserted into the Flash BIOS image before burning.
»	Command	Function
»	&A0	Caller ID information transmission disabled.
»	&A1	Caller ID information transmission enabled.

CALLING TONE
Type:		Configuration
	Format:	AT [cmds] $T n [cmds]
	Example:	AT $T1 DT555-1212 <CR>
	Description:	Controls the transmission of the calling tone while dialing.
»	Command	Function
»	$T0	Calling tone enabled.
»	$T1	Calling tone disabled.

COMMAND SET
Type:		Configuration
	Format:	AT &Q n
	Example:	AT &Q1 <CR>
	Description:	Selects standard Hayes or custom command sets.
»	Command	Function
»	&Q0	Multi-Tech custom command set enabled.
»	&Q1	Standard Hayes command set enabled.

COMPRESSION
Type:		Configuration
	Format:	AT &E n
	Example:	AT &E15 #L0 <CR>
	Description:	Selects data compression.
»	Command	Function
»	&E14	Data compression disabled.
»	&E15	Data compression enabled.

COMPRESSION MODE
Type:		Configuration
	Format:	AT #L n
	Example:	AT #L2 DT555-1212 <CR>
	Description:	Selects active compression protocols.
»	Command	Function
»	#L0	V.42 negotiation enabled.
»	#L1	MNP negotiation enabled.
»	#L2	LAP-M negotiation enabled.
»	#L3	LAP-M enabled, no negotiation.

CTS SIGNAL
Type:		Configuration
	Format:	AT [cmds] &RF n [cmds]
	Example:	AT &RF0 <CR>
	Description:	Selects the function of the CTS signal.
»	Command	Function
»	&RF0	CTS is set to RTS.
»	&RF1	CTS is independent of RTS.

DIAL STORED PHONE NUMBER
Type:	Immediate
Format:	AT [cmds] N n1 [N n2 , N n3 ...]
Example:	ATM0 N1N3N5 <CR>
Description:	Dials stored phone number(s). If the first number is busy, the modem will proceed to the next number in the list.

DSR SIGNAL
Type:		Configuration
	Format:	AT [cmds] &SF n [cmds]
	Example:	AT &SF0 <CR>
	Description:	Selects the function of the DSR signal.
»	Command	Function
»	&SF0	DSR is set to CD.
»	&SF1	DSR is independent of CD.

DTR DIALING
Type:		Configuration
	Format:	AT [cmds] $D n [cmds]
	Example:	AT $D1 DT555-1212 <CR>
	Description:	Turns DTR dialing on and off.
»	Command	Function
»	$D0	DTR dialing disabled.
»	$D1	DTR dialing enabled.

ERASE CALLBACK NUMBER
Type:	Immediate
Format:	AT [cmds] #RDN n [cmds]
Example:	AT #RCBN05 #RDN05 <CR>
Description:	Erases the callback phone number at the memory location specified.

ERASE CALLBACK PASSWORD
Type:	Immediate
Format:	AT [cmds] #RCBN n [cmds]
Example:	AT #RCBN05 #RDN05 <CR>
Description:	Erases the callback password at the memory location specified.

ESCAPE SEQUENCE - OUT OF BAND
Type:	Immediate
Format:	<BREAK> AT [cmds] <CR>
Example:	<BREAK> AT #F1 <CR>
Description:	Puts the modem in Command Mode.
Notes:	Do not precede this command with AT. <BREAK> refers to the hardware modem break signal.

FALLBACK MODE
Type:		Configuration
	Format:	AT [cmds] #F n [cmds]
	Example:	AT #F1 O <CR>
	Description:	Sets direction of fallback.
»	Command	Function
»	#F0	Fallback disabled.
»	#F1	Fallback from 28.8Kbps to 2400bps as line quality degrades.
»	#F2	Fallback from 2400bps to 28.8Kbps as line quality improves.

FLOW CONTROL
Type:		Configuration
	Format:	AT [cmds] &E n [cmds]
	Example:	AT &E13 <CR>
	Description:	Selects flow control.
»	Command	Function
»	&E12	Flow control disabled.
»	&E13	Flow control enabled.

FLOW CONTROL - ENQ/ACK
Type:		Configuration
	Format:	AT [cmds] &E n [cmds]
	Example:	AT &E9 <CR>
	Description:	Selects ENQ/ACK pacing.
»	Command	Function
»	&E8	Enables ENQ/ACK pacing.
»	&E9	Disables ENQ/ACK pacing.

FLOW CONTROL IN NORMAL MODE
Type:		Configuration
	Format:	AT [cmds] &E n [cmds]
	Example:	AT &E11 O <CR>
	Description:	Selects XON/XOFF flow control for non-error-correcting connections.
»	Command	Function
»	&E10	XON/XOFF disabled for non-error-correcting connections.
»	&E11	XON/XOFF enabled for non-error-correcting connections.

FLOW CONTROL TYPE
Type:		Configuration
	Format:	AT [cmds] &E n [cmds]
	Example:	AT &E4 &W <CR>
	Description:	Sets type of flow control used by modem.
»	Command	Function
»	&E3	Flow control disabled.
»	&E4	CTS/RTS flow control enabled.
»	&E5	XON/XOFF flow control enabled.

HANDSHAKE ATTEMPTS
Type:		Configuration
	Format:	AT [cmds] #A n [cmds]
	Example:	AT #A1 #L3 <CR>
	Description:	Configures the initial handshake phase.
»	Command	Function
	#A0	Attempts in order: 28.8Kbps, 24Kbps, 21.6Kbps, 19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps, 2400bps, 1200bps, 300bps.
	#A1	Attempts only 28.8Kbps.
	#A2	Attempts in order: 28.8Kbps, 24Kbps, 21.6Kbps, 19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps.
	#A3	Attempts in order: 2400bps, 1200bps, 300bps.

HELP SCREENS
Type:	Immediate
Format:	AT $H n
Example:	AT $H1 <CR>
Description:	Shows modem help screens.
Command	Function
$H1	Shows help screen 1.
$H2	Shows help screen 2.
$H3	Shows help screen 3.

LIST CONFIGURATION
Type:	Immediate
Format:	AT L n
Example:	AT L5 <CR>
Description:	Lists modem configuration.
Command	Function
L	Lists all stored phone numbers.
L5	Lists all settings.
L6	Lists the values of all S-registers.
L7	Lists extended parameters.
L8	Lists current diagnostics.

LOCAL SERIAL PORT SPEED
Type:		Configuration
	Format:	AT [cmds] $SB nnn [cmds]
	Example:	AT $MB9600 $SB19200 <CR>
	Description:	Sets serial port speed.
»	Command	Function
	$SB300	Sets 300bps speed.
	$SB1200	Sets 1200bps speed.
	$SB2400	Sets 2400bps speed.
	$SB4800	Sets 4800bps speed.
	$SB9600	Sets 9600bps speed.
	$SB19200	Sets 19.2Kbps speed.
	$SB38400	Sets 38.4Kbps speed.
	$SB57600	Sets 57.6Kbps speed.
	$SB115200	Sets 115.2Kbps speed.

LOCK SERIAL PORT
Type:		Configuration
	Format:	AT [cmds] $BA n [cmds]
	Example:	AT $SB57600 $BA0 <CR>
	Description:	Sets operation of serial port speed.
»	Command	Function
»	$BA0	Serial speed locked at rate set by $SB.
»	$BA1	Serial speed follows connect speed, ignoring $SB.

LOGIN PASSWORD
Type:	Configuration
Format:	AT [cmds] #I xxxx
Example:	AT #IMicroHouse <CR>
Description:	Sets the login password to xxxx . The password must be between 6 and 10 characters, case sensitive. It defaults to MULTI-TECH.

MAXIMUM BLOCK SIZE FOR TRANSMISSION
Type:		Configuration
	Format:	AT [cmds] &BS n [cmds]
	Example:	AT &BS1 &MB28800 <CR>
	Description:	Sets the maximum transmittable block size.
»	Command	Function
»	&BS0	Maximum block size is 64 characters.
»	&BS1	Maximum block size is 128 characters for LAP-M, and 256 characters for MNP.

REDIAL
Type:	Immediate
Format:	ATA:
Example:	AT A: <CR>
Description:	Redials the last number dialed until it is no longer busy.

REMOTE CONNECT SPEED
Type:		Configuration
	Format:	AT $MB nnn
	Example:	AT $MB9600 $SB19200 <CR>
	Description:	Sets maximum remote connect speed.
»	Command	Function
	$MB75	Sets V.23 (1200bps/75bps bi-directional).
	$MB300	Sets 300bps connect.
	$MB1200	Sets 1200bps connect.
	$MB2400	Sets 2400bps connect.
	$MB4800	Sets 4800bps connect.
	$MB9600	Sets 9600bps connect.
	$MB14400	Sets 14.4Kbps connect.
	$MB19200	Sets 19.2Kbps connect.
	$MB28800	Sets 28.8Kbps connect.

RETRANSMIT FAIL ACTION
Type:		Configuration
	Format:	AT [cmds] $R n [cmds]
	Example:	AT $R1 <CR>
	Description:	Sets whether the modem gives up on a bad connection.
»	Command	Function
»	$R0	Hang up after 12 failed retransmissions.
»	$R1	Do not hang up after 12 failed retransmissions.

SETUP PASSWORD
Type:	Configuration
Format:	AT [cmds] #S xxxx
Example:	AT #SsNaFu <CR>
Description:	Sets the setup password to xxxx . The password must be between 6 and 10 characters, case sensitive. It defaults to MODEMSETUP.

STORE PHONE NUMBER IN NVRAM
Type:	Configuration
Format:	AT [cmds] D <#> N n [dialstring]
Example:	AT D555-1212N1 <CR>
Description:	Stores a phone number in the modem’s memory.

TRELLIS MODULATION
Type:		Configuration
	Format:	AT [cmds] #T n [cmds]
	Example:	AT #T1 <CR>
	Description:	Controls Trellis Coded Modulation.
»	Command	Function
»	#T0	Disables TCM.
»	#T1	Enables TCM.

UUCP SPOOFING
Type:		Configuration
	Format:	AT [cmds] $SP n [cmds]
	Example:	AT $SP1 O <CR>
	Description:	Controls the UUCP spoofing function.
»	Command	Function
»	$SP0	Spoofing disabled.
»	$SP1	Spoofing enabled.

XON/XOFF PASS-THROUGH
Type:		Configuration
	Format:	AT [cmds] &E n [cmds]
	Example:	AT &E7 O <CR>
	Description:	Selects whether XON/XOFF signals are sent to remote modem.
»	Command	Function
»	&E6	XON/XOFF signals trapped by local modem.
»	&E7	XON/XOFF passed through local modem.

XOFF SEND
Type:		Configuration
	Format:	AT [cmds] #X n [cmds]
	Example:	AT #X1 <CR>
	Description:	Selects how XOFF signal is sent.
»	Command	Function
»	#X0	Single XOFF character sent until ready.
»	#X1	Multiple XOFF characters sent until ready.