CONNECTIONS
Purpose	Location	Purpose	Location
Line out	CN1	Power switch	SW1
Line in	CN2	Data/Voice	SW2
RS-232/422	CN3	Answer/Originate	SW3
AC power	CN4

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
PW	Red	On	Power is on.
PW	Red	Off	Power is off
TR	Red	On	DTR signal is high
TR	Red	Off	DTR signal is low
CS	Red	On	CTS signal is high
CS	Red	Off	CTS signal is low
TD	Red	Blinking	Modem is transmitting data
TD	Red	Off	Modem is not transmitting data
CD	Red	On	Carrier signal detected
CD	Red	Off	Carrier signal not detected
RD	Red	Blinking	Modem is receiving data
RD	Red	Off	Modem is not receiving data
AA	Red	On	Auto-answer enabled
AA	Red	Off	Auto-answer disabled
AA	Red	Blinking	Phone is ringing
OH	Red	On	Modem is off-hook
OH	Red	Off	Modem is on-hook

AUTO-RETRAIN - FALLBACK/FALLFORWARD
Type:	Configuration
Format:	AT [cmds] %En [cmds]
Example:	AT %E1 <CR>
Description:	Controls auto-retrain mode and fallback/fall forward.
Command	Function
» %E0	Auto-retrain disabled.
%E1	Auto-retrain enabled.
%E2	Fallback/fall forward enabled.

BIT-MAPPED REGISTERS
Register	Default
S14	138
S16	0
S21	0
S23	54
S27	9
S28	0
S31	2
S36	7
S40	105
S41	3
S82	128
S91	10
S92	10
S95	0
S201	58

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

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	Serial interface enabled
\N2	Reliable mode enabled.
\N3	Auto-reliable mode enabled.
\N4	LAPM mode enabled.
\N5	MNP mode enabled.

FLOW CONTROL CHARACTER - XON
Type:	Register
Format:	AT [cmds] S32=n [cmds]
Example:	AT S32=20<CR>
Default:	17
Range:	0 - 255
Unit:	ASCII
Description:	Sets the character used to represent XON.

FLOW CONTROL CHARACTER - XOFF
Type:	Register
Format:	AT [cmds] S33=n [cmds]
Example:	AT S33=20<CR>
Default:	19
Range:	0 - 255
Unit:	ASCII
Description:	Sets the character used to represent XOFF.

HDLC ADDRESS
Type:	Register
Format:	AT [cmds] S20=n [cmds]
Example:	AT S20=6<CR>
Default:	0
Range:	0 - 255
Unit:	N/A
Description:	Sets the HDLC address/BSC character.

DISPLAY LINE SIGNAL LEVEL
Type:	Immediate
Format:	AT [cmds] %L [cmds]
Example:	AT %L &W<CR>
Description:	Displays a value of the received line signal level.

DISPLAY LINE SIGNAL QUALITY
Type:	Immediate
Format:	AT [cmds] %Q [cmds]
Example:	AT %Q &W<CR>
Description:	Displays line signal quality.

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] \Gn [cmds]
Example:	AT \G1 &K3<CR>
Description:	Selects modem port flow control.
Command	Function
» \G0	Flow control disabled.
\G1	Flow control 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 103A
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=21600	Set minimum or maximum transfer rate at 21600bps, 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.

MODULATION SELECTION DISPLAY
Type:	Immediate
Format:	AT [cmds] +MS?
Example:	AT &V +MS?<CR>
Description:	Displays modulation, automode, minimum rate and maximum rate settings

V.42 HANDSHAKE OPTIONS
Type:	Register
Format:	AT [cmds] S48=n [cmds]
Example:	AT S48=7<CR>
Default:	7
Range:	0, 7, or 128
Description:	Controls the V.42 handshake sequence.
Command	Function
S48=0	V.42 negotiation disabled.
» S48=7	V.42 negotiation enabled.
S48=128	V.42 disabled; fallback according to S36.