All commands must begin with the AT prefix, followed by the command letter and ended with 
the ENTER key.  Spaces are allowed in the command string to increase command line readability 
but are ignored by the modem during command execution.  All commands may be typed in either 
upper or lower case, but never mixed.  A command issued without any parameters is considered 
as specifying the same command with a parameter of 0.

Command	Function of Command
A	Answer incoming call
A/	Repeat last command. Do not precede A/ with AT or follow with ENTER
B0	CCITT mode @ 1200bps
D_	0-9, A-D, # and *
L	Last number redial
P	Pulse dial
S=n	Dial stored number, n=0-3
T	Tone dial
W	Wait for second dial tone
,	Pause
@	Wait for 5 secs of silence
!	Flash
;	Return to command mode after dialling
&	Wait for AT&T bong tone
DS=n	Dial one of the four stored phone numbers (n=0-3) in the modems memory
E0	Command echo disabled
E1	Command echo enabled
+++	Escape characters - switch from data mode to command mode
F0	Autoscan mode
F1	300 bps connection only
F2	Reserved
F3	V.23 connection only
F4	1200 bps connection only
F5	2400 bps connection only
F6	4800 bps connection only
F7	7200 bps connection only
F8	9600 bps connection only
F9	12000 bps connection only
F10	14400 bps connection only
H0	Modem on hook (hangup)
H1	Modem off hook (make busy)
I0	Product code
I1	Checksum code
I2	ROM test
I3	Firmware and device ID
I4	Reserved ID
I5	Reserved ID
I6	Datapump ID
L0	Low speaker
L1	Low speaker
L2	Medium speaker
L3	High speaker
M0	Speaker off
M1	Speaker on till carrier detect
M2	Speaker on
M3	Speaker off during dialling, on until carrier detected
N0	Connect only at DTE rate
N1	Auto rate negotiation
O0	Return to data mode
O1	Initiate an equaliser retrain and return to date mode
P	Pulse dial
Q0	Result codes enabled
Q1	Result codes disabled
Sr?	Read S register r  where r=0-95
Sr=n	Set S register r to value n (r=0-95;n=0-255)
T	Tone dial
V0	Numeric responses
V1	Text responses
W0	Report DTE speed only
W1	Report line speed, error correction protocol, and DTE speed
W2	Report DCE speed only
X0	Hayes Smartmodem 300 compatible responses/blind dialling
X1	Same as X0 plus all CONNECT responses/blind dialling
X2	Same as X1 plus dial tone detection
X3	Same as X1 plus busy signal detection/blind dialling
X4	All responses and dial tone and busy signal detection
Y0	Long space disconnect disabled
Y1	Long space disconnect enabled
Z0	Reset and recall user profile 0
Z1	Reset and recall user profile 1