Multi-Tech Systems MT5600DSVD manual S37

MultiModemDSVD User Guide	4 AT Commands, S-Registers, and Result Codes
Register Unit	Range Default Description
	6	Reserved.
	7	An MNP connection is attempted and
		if it fails, a normal modem connection
		is established.

S37	decimal	0	0	Sets the maximum V.34 speed at which the
				modem attempts to connect. The default
				value is an automode connection. If N0 is
				active, connection is attempted at the most
				recently sensed serial port speed (+MS=
				command settings are updated to the ap-
				propriate values). If N1 is active, connec-
				tion is attempted at the highest possible
				speed. (+MS= settings are updated to
				11,1,300,3360 to reflect V.34, automode,
				300 bps minimum speed, and 33600 bps
				maximum speed). Supported only for
				compatibility with existing software; use
				the +MS= command instead.
S38	seconds	0–254, 255	20	Sets the delay between the modem’s receipt
				of the H command to disconnect (or high-
				to-low transition of DTR if the modem is
				programmed to follow the signal), and the
				disconnect operation. Applies only to error-
				correction connections. This register can be
				used to ensure that data in the modem buff-
				er is sent before the modem disconnects. If
				S38 is set to a value between 0 and 254, the
				modem waits for the remote modem to ac-
				knowledge all data in the modem buffer
				before disconnecting. 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.
S46	decimal	136, 138	138	Enables or disables data compression:
				136 Error correction without compression.
				138 Error correction with compression.
S48	decimal	0, 7, 128	7	Enables or disables LAPM negotiation. An
				invalid value is treated as a 128 value.
				0	Disables negotiation and proceeds
					with LAPM.
				7	Enables negotiation.
				128	Disables negotiation and proceeds at
					once with the fallback action specified
					in S36. Can be used to force MNP.

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