Card Type	Modem (asynchronous)
Chipset	Unidentified
I/O Options	Speakerphone
Maximum Data Rate	2400bps
Data Modulation	Bell 103A/212A ITU-T V.21, V.22, V.22bis
Error Correction/Compression	MNP3
Data Bus	Serial

CONNECTIONS
Function	Label	Function	Label
Speakerphone button	BT1	DC power in	CN4
Mute button	BT2	Microphone	MIC
Telephone line out	CN1	Volume control	R1
Telephone line in	CN2	Power switch	SW2
RS-232/422 port	CN3

USER CONFIGURABLE SETTINGS
Setting	Label	Position
í Modem ignores DTR	SW1/1	Off
Modem disconnects and does not accept commands on low DTR; auto-answer is disabled	SW1/1	On
í Verbose result code format enabled.	SW1/2	Off
Numeric result code format enabled.	SW1/2	On
í Result codes enabled	SW1/3	Off
Result codes disabled	SW1/3	On
í Command echo enabled	SW1/4	Off
Command echo disabled	SW1/4	On

USER CONFIGURABLE SETTINGS (CON’T)
Setting	Label	Position
í Auto-answer disabled	SW1/5	Off
Auto-answer after first ring	SW1/5	On
í CD signal forced high	SW1/6	Off
CD signal normal	SW1/6	On
í Modem is connected to RJ-11 or RJ-14 jack	SW1/7	Off
Modem is connected to RJ-12 or RJ-13 jack	SW1/7	On
í Command set enabled	SW1/8	Off
Command set disabled	SW1/8	On
í Modem uses Bell 212A at 1200bps	SW1/9	Off
Modem uses ITU-T V.22 at 1200bps	SW1/9	On

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
SPL	Red	On	Modem is in speakerphone mode
SPL	Red	Off	Modem is not in speakerphone mode
ML	Red	On	Speakerphone is muted
ML	Red	Off	Speakerphone is not muted
RI	Red	On	Phone is ringing
RI	Red	Off	Phone is not ringing
HS	Red	On	Modem is operating at 2400bps
HS	Red	Off	Modem is operating at slower than 2400bps
AA	Red	On	Auto-answer enabled
AA	Red	Off	Auto-answer disabled
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	Blinking	Modem is receiving data
RD	Red	Off	Modem is not receiving data
TD	Red	Blinking	Modem is transmitting data
TD	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

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, B, E, F, H, L, M, O, Q, V, X, Y, Z

&C, &D, &G, &L, &P, &T

Extended AT Commands

\B, \C, \J, \K, \N, \O, \Q, \T, \U, \V, \X, \Y, \Z

%A

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S18, S21, S22, S23, S27

Note: See MHI help file for complete information. Not all EMAC-MD2400 modems support MNP. Those that do not will not support the Extended AT Commands line.

DIAL
Type:	Immediate
Format:	AT [cmds] D<#>;[cmds]
Description:	Dials the telephone number indicated 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.
DR	Answer mode enabled; originate mode disabled following handshake initiation.
DT	Tone dialing enabled.
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 Quiet 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/	Dialing paused for 1/8 second.
D;	Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

CALL SWITCHING
Type:	Immediate
Format:	AT [cmds] &En [cmds]
Description:	Selects whether the modem will automatically disconnect a data call if the phone is picked up.
Command	Function
í &E0	Call switching enabled.
&E1	Call switching disabled.

DISPLAY INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays information requested about the modem.
Command	Function
I0	Displays product identification code.
I1	Displays ROM checksum.
I2	Displays current connection speed, data bits, and parity.
I3	Displays 000 if modem is on-hook and 001 if modem is off-hook.
I4	Displays modem identification string (displayed in parentheses in model name header on MHI document).

HELP
Type:	Immediate
Format:	AT [cmds] &Hn [cmds]
Description:	Displays help on the topic indicated.
Command	Function
&H0	Displays help on AT commands.
&H1	Displays help on S-registers.
&H2	Displays help on modem result codes.

SPEED CHANGE MESSAGES
Type:	Immediate
Format:	AT [cmds] &In [cmds]
Description:	Selects whether the modem will send a "SPEED MISMATCH/PLEASE SET TO xxxx" message if the serial port speed is different than the line speed.
Command	Function
í &I0	Speed change messages enabled.
&I1	Speed change messages disabled.