Technics MT5634SMI-92 manual $Dn DTR Dialing, $EBn Asynchronous Word Length, $MBn Online BPS Speed

			Chapter 5 – AT Commands, S-Registers, and Result Codes
Command:	%Sn	Command Speed Response
Values:		n = 0, 1
Default:		0
Description:		%S0 Sets modem to respond to AT commands at all normal speeds.
		%S1 AT commands accepted at 115200 bps only. Commands at other speeds are ignored.
Command:	$Dn	DTR Dialing
Values:		n = 0 or 1
Default:		0
Description:		$D0 Disables DTR dialing.
		$D1 Dials the number in memory location 0 when DTR goes high.
Command:	$EBn	Asynchronous Word Length
Values:		n = 0 or 1
Default:		0
Description:		$EB0 Enables 10-bit mode.
		$EB1 Enables 11-bit mode.
Command:	$MBn	Online BPS Speed
Values:		n = speed in bits per second
Default:		28,800
Description:		$MB75	Selects CCITT V.23 mode
		$MB300	Selects 300 bps on-line
		$MB1200	Selects 1200 bps on-line
		$MB2400	Selects 2400 bps on-line
		$MB4800	Selects 4800 bps on-line
		$MB9600	Selects 9600 bps on-line
		$MB14400	Selects 14400 bps on-line
		$MB19200	Selects 19200 bps on-line
		$MB28800	Selects 28800 bps on-line
		$MB33600	Selects 33600 bps on-line
Command:	$RPn	Ring Priority vs. AT Command Priority
Values:		n = 0 or 1
Default:		1
Description:		$RP0	The AT command will have priority over the ring. S1 will be reset to 0 if an
			AT command is received. This command is storable to memory.
		$RP1	The ring will have priority over the AT command. S1 will increment even if an
			AT command and ring are received together and the incoming call will be
			answered when S1 is equal to S0.
			Note: SocketModems do not detect ring cadence of TelTone telephone line
			simulators as a valid ring.
Command:	$SBn Serial Port Baud Rate
Values:		n= speed in bits per second
Default:		115200
Description:		$SB300	Sets serial port to 300 bps
		$SB1200	Sets serial port to 1200 bps
		$SB2400	Sets serial port to 2400 bps
		$SB4800	Sets serial port to 4800 bps
		$SB9600	Sets serial port to 9600 bpst
		$SB19200	Sets serial port to 19200 bps
		$SB38400	Sets serial port to 38400 bps
		$SB57600	Sets serial port to 57600 bps
		$SB115200	Sets serial port to 115200 bps
		$SB230400	Sets serial port to 230400 bps

SocketModem Global MT5634SMI Developer’s Guide 32