Multi-Tech Systems MT2834ZDX manual SFn DSR/CD Interaction Control, $SBn Serial Port Baud Rate

			Chapter 3 – AT Commands, S-Registers, and Results Codes
Command:	&SFn		DSR/CD Interaction Control
Values:	n = 0 or 1
Default:	0
Description:	&SF0 Select DSR to follow CD.
	&SF1 Select DSR to be independent.
Command:	$SBn Serial Port Baud Rate
Values:	n = speed
Default:	57600
Description:	$SB300 Set serial port to 300 bps.
	$SB1200 Set serial port to 1200 bps.
	$SB2400 Set serial port to 2400 bps.
	$SB4800 Set serial port to 4800 bps.
	$SB9600 Set serial port to 9600 bps.
	$SB19200 Set serial port to 19200 bps.
	$SB38400 Set serial port to 38400 bps.
	$SB57600 Set serial port to 57600 bps.
	$SB115200 Set serial port to 115200 bps.
	Note: Baud adjust must be off ($BA0) to enable fixed baud rate.
Command:	T	Tone-Dial
Values:	n/a
Default:	P command
Description:	Modem will tone-dial numbers following a T in the dialing command.
Command:	&Tn Respond to Remote Digital Loopback Signal
Values:	n = 4 or 5
Default:	5
Description:	&T4 Enable response to remote digital loopback signal.
	&T5 Disable response to remote digital loopback signal.
Command:	#Tn		Trellis-Coded Modulation
Values:	n = 0 or 1
Default:	1
Description:	#T0 Disable trellis-coded modulation.
	#T1 Enable trellis-coded modulation.
Command:	Un		Loopback Test Modes
Values:	n = 0, 1, 2, or 3
Default:	None
Description:	U0 Enable local nalog loopback originate mode.
	U1 Enable local analog loopback answer mode.
	U2 Enable remote digital loopback mode.
	U3 Enable local digital loopback mode.
Command:	Vn	Result Codes (Verbose/Terse)
Values:	n = 0 or 1
Default:	1
Description:	V0 Result codes sent as digits (terse response).
	V1 Result codes sent as words (verbose response).
Command:	#Vn		V.32terbo Handshake Tones
Values:	n = 0 or 1
Default:	1
Description:	#V0 Include V.32terbo tones in handshake.
	#V1 Exclude V.32terbo tones from handshake.
Command:	W Wait for New Dial Tone
Values:	n/a
Description:	Inserted in dialing command, causes modem to wait for a new dial tone. (X2 or X4 must be
	selected.)

Multi-Tech Systems, Inc. MT2834ZDX User's Guide 15