CONNECTIONS
Purpose	Location	Purpose	Location
Line out	CN1	RS-232/422	CN3
Line in	CN2	DC power	CN4

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
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
SD	Red	Blinking	Modem is transmitting data
SD	Red	Off	Modem is not transmitting data
PWR	Red	On	Power is on
PWR	Red	Off	Power is off

SUPPORTED COMMAND SET

Basic AT Commands

AT, ‘+++’, ‘comma’, A/

A, B, C, D, E, F, H, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z

&A, &B, &C, &D, &F, &G, &J, &K, &L, &M, &P, &Q, &R, &S, &T, &V, &W, &X, &Y, &Z

Extended AT Commands

\A, \B, \C, \E, \G, \J, \K, \L, \O, \Q, \T, \U, \V, \W, \X, \Y, \Z

%A, %L, %Q, %TT

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S16, S18, S24, S25, S26, S29,

S38, S39, S46, S48, S82, S86, S90, S91, S92, S95, S99, S108, S109, S110, 201

Special Commands

*H, "H, "N, "O,-J, -K, -Q, )M, @M, :E, #CID, +MS?

Note: See MHI Help File for full command documentation.

AUTO FALL FORWARD/FALLBACK
Type:	Configuration
Format:	AT [cmds] %Gn [cmds]
Example:	AT %G1 &W <CR>
Description:	Selects auto fall forward/fallback.
Command	Function
%G1	Fall forward/fallback disabled.
» %G0	Fall forward/fallback enabled.

COMPRESSION AND ERROR CORRECTION
Type:	Configuration
Format:	AT %Cn
Example:	AT %C0 *Y1<CR>
Description:	Selects data compression and error correction.
Command	Function
%C0	Data compression disabled.
%C1	Data compression enabled.
%C2	Data correction enabled.
» %C3	Data compression and correction enabled.

CONNECT MODE
Type:	Configuration
Format:	AT [cmds] \Nn [cmds]
Example:	AT \N1 DT555-1212<CR>
Description:	Sets connect mode.
Command	Function
\N0	Normal mode enabled.
\N1	Direct mode enabled.
\N2	Reliable mode enabled.
» \N3	Auto-reliable mode enabled.
\N4	LAPM/MNP mode enabled.

MODULATION SELECTION
Type:	Configuration
Format:	AT [cmds] +MS=xx,y,zzz,aaa [cmds]
Example:	AT +MS11,1,300,28800 &W<CR>
Description:	Sets options for active protocol. The transfer rates specified by z and a must be valid for the protocol selected.
Command	Function
x=0	V.21
x=1	V.22
x=2	V.22bis
x=3	V.23
x=9	V.32
x=10	V.32bis
» x=11	V.34
x=64	Bell 103
x=69	Bell 212A
x=74	V.FC
y=0	Automode disabled.
y=1	Auto-detect highest speed enabled.
z, a=300	Set minimum or maximum transfer rate at 300bps, respectively.
z, a=1200	Set minimum or maximum transfer rate at 1200bps, respectively.
z, a=2400	Set minimum or maximum transfer rate at 2400bps, respectively.
z, a=4800	Set minimum or maximum transfer rate at 4800bps, respectively.
z, a=7200	Set minimum or maximum transfer rate at 7200bps, respectively.
z, a=9600	Set minimum or maximum transfer rate at 9600bps, respectively.
z, a=12000	Set minimum or maximum transfer rate at 12000bps, respectively.
z, a=14400	Set minimum or maximum transfer rate at 14400bps, respectively.
z, a=16800	Set minimum or maximum transfer rate at 16800bps, respectively.
z, a=19200	Set minimum or maximum transfer rate at 19200bps, respectively.
z, a=24000	Set minimum or maximum transfer rate at 24000bps, respectively.
z, a=26400	Set minimum or maximum transfer rate at 26400bps, respectively.
z, a=28800	Set minimum or maximum transfer rate at 28800bps, respectively.

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Example:	AT I1 O<CR>
Description:	Displays modem properties.
Command	Function
I0	Reports product code.
I1	Reports ROM checksum result.
I2	Reports ROM checksum OK or ERROR
I3	Reports firmware version.
I4	Reports current command settings.
I5	Reports copyright information.
I7	Reports configuration.
I10	Reports modem’s optional features

RETRAIN
Type:	Configuration
Format:	AT [cmds] %E1 [cmds]
Example:	AT %E1<CR>
Description:	Requests a retrain.
Command	Function
%E0	Disabled
» %E1	Enabled