Multi-Tech Systems MT5600SMI-P92, MT5600SMI-XL34 manual Register Unit Range Default Description S36

				Chapter 5 – AT Commands, S-Registers, and Result Codes
Register	Unit	Range	Default	Description
S36			7	LAPM Failure Control: This value indicates what should happen
				upon a LAPM failure. These fallback options are initiated immediately
				upon connection if S48=128. If an invalid number is entered, the
				number is accepted into the register, but S36 will act as if the default
				value has been entered. *
				Default: 7 (00000111b)
				Bits 0-2
				0	= Modem disconnects.
				1	=	Modem stays on-line and a Direct mode connection is
				established.
				2	=	Reserved.
				3	=	Modem stays on-line and a Normal mode connection is
				established.
				4	=	An MNP connection is attempted and if it fails, the modem
				disconnects.
				5	=	An MNP connection is attempted and if it fails, a Direct
				mode connection is established.
				6	=	Reserved.
				7	=	An MNP connection is attempted and if it fails, a Normal
				mode connection is established. (Default.)
				Bits 3-7		Reserved
S38	seconds	0–255	20	Delay Before Forced Hang Up: Specifies the delay between the
				modem's receipt of the H command to disconnect (or ON-to-OFF
				transition of DTR if the modem is programmed to follow the signal),
				and the disconnect operation. Applicable to error-correction
				connection only. This parameter can be used to ensure that data in
				the modem buffer is sent before the modem disconnects.
				If S38 is set to a value between 0 and 254, the modem will wait that
				number of seconds for the remote modem to acknowledge all data in
				the modem buffer before disconnecting. If time expires before all data
				is sent, the NO CARRIER result code will be issued to indicate that
				data has been lost. If all data is transmitted prior to time-out, the
				response to the H0 command will be OK.
				If S38 is set to 255, the modem does not time-out and continues to
				attempt to deliver data in the buffer until the connection is lost or the
				data is delivered.
S39			3	Flow Control Bit-Mapped Options Status.
				Default:		3 (00000011b)
				Bits 0-2		Status of command options
				0	=	No flow control
				3	=	RTS/CTS (&K3) (Default.)
				4	=	XON/XOFF (&K4)
				5	=	Transparent XON (&K5)
				6	=	Both methods (&K6)
				Bits 3-7		Reserved
S40			104 (68h) General Bit-Mapped Options Status. Indicates the status of
				command options.
				Default:		104 (68h) (01101000b)
				Bits 0-1		MNP Extended Services (-Kn)
				0	=	Disable extended services (-K0) (Default.)
				1	=	Enable extended services (-K1)
				2	=	Enable extended services (-K2)
				Bit 2 Reserved
				Bits 3-5		Break Handling (\Kn)
				0	=	\K0
				1	=	\K1
				2	=	\K2
				3	=	\K3
				4	=	\K4
				5	=	\K5 (Default.)
				Bits 6-7		Reserved*

Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 79