Multitech MT1432BA, MT2834BAI manual $VDn, #Xn, 137

		Appendix D - AT Command Summary
Command	Values	Description
Un	n = 0, 1, 2, or 3	U0 places modem in Analog Loop Originate Mode.
		U1 places modem in Analog Loop Answer Mode.
		U2 places modem in Remote Digital Loopback test
		mode.
		U3 places modem in Local Digital Loopback test
		mode.
$VDn	n= 0 or 1	* $VD0 disables Voice/Data Dialing
		$VD1 enables Voice/Data Dialing
Vn	n = 0 or 1	V0 means Result Codes sent as digits (terse
		response).
		* V1 means Result Codes sent as words (verbose
		response).
W		Wait for new dial-tone.
&Wn	n = 0 or 1	&W0 causes modem to store its current parameters
		in non-volatile RAM, and modem will load these for
		future sessions instead of reading factory ROM
		defaults, unless &F command used.
		* &W1 causes modem to not store parameters.
Xn	n = 0,1,2,3 or 4	* X0 selects Basic Result Codes (w/o CONNECT
		1200, CONNECT 2400).
		X1 selects Extended Result Codes (w/CONNECT
		1200, CONNECT 2400).
		X2 selects Standard AT Command set with NO
		DIAL TONE.
		X3 selects Standard AT Command set with BUSY.
		X4 selects Standard AT Command set with NO
		DIAL TONE and BUSY.
#Xn	n= 0 or 1	* #X0 selects single XOFF character sent until XON
		level returns.
		#X1 selects multiple XOFF characters after buffer
		level is full.
Yn	n = 0 or 1	* Y0 disables sending or responding to long space
		“break”.
		Y1 enables sending or responding to long space
		“breaks”.
Z		All configuration parameters are reset to default
		values.
,	In Dial Command	Causes pause during dialing.
;	In Dial Command	Causes return to Command Mode after dialing.
!	In Dial Command	Causes modem to flash On-Hook.
@	In Dial Command	Causes modem to wait for ringback, then 5 seconds
		of silence before processing next part of command.

* Factory Default Setting

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