MaxTech V.32bis, V.42bis user manual Extended AT Commands

	M2	Internal speaker always on
	M3	Internal speaker on until carrier detected and
		off while dialing
N_	N0	Connect only at DTE rate
	N1	Automatic rate negotiation
O_	O0	Return to Data Mode
	O1	Return to Data Mode and initiate an equalizer
		retrain
P		Set Pulse dial as default
Q_	Q0	Modem sends responses
	Q1	Modem does not send responses
Sr?	r=0-30 Read and display value in register r
Sr=n		Set register r to value n (r=0-30; n=0-255)
T		Set Tone Dial as default
V_	V0	Numeric responses
	V1	Word responses
X_	X0	Hayes Smartmodem 300 compatible
		responses/blind dialing
	X1	Same as X0 plus all CONNECT responses/
		blind dialing
	X2	Same as X1 plus dial tone detection
	X3	Same as X1 plus busy signal detection/blind
		dialing
	X4	All responses and dial tone and busy signal
		detection
Y_	Y0	Modem does not send or respond to break
		signals
	Y1	Modem sends break signal for four seconds
		before disconnecting
Z_	Z0	Reset and retrieve active configuration
		profile 0
	Z1	Reset and retrieve active configuration
		profile 1

3.4	Extended AT Commands
&C_	&C0	Force Carrier Detect Signal High (ON)
	&C1	Turn on Carrier Detect signal when remote
		carrier signal is present
&D_	&D0	Modem ignores the Data Terminal Ready
		signal

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