Multi-Tech Systems MT5600SMI-P34, MT5600SMI-XL34 manual Command +DR Data Compression Reporting

Chapter 5 – AT Commands, S-Registers, and Result Codes

	<max_codewords_tx> Decimal number 256 to 2048 that specifies the
	maximum number of codewords which should be negotiated in the transmit
	direction. (Default = 2048.)
	<max_codewords_rx> Decimal number 256 to 2048 that specifies the
	maximum number of codewords which should be negotiated in the receive
	direction. (Default = 2048.)
	<max_string_tx> Decimal number 32 to 255 that specifies the maximum
	string length to be negotiated in the transmit direction. (Default = 32.)
	<max_string_rx> Decimal number 32 to 255 that specifies the maximum
	string length to be negotiated in the receive direction. (Default = 32.)
	<max_history_tx> Decimal number 2048 to 4096 that specifies the
	maximum size of the history buffer to be negotiated in the transmit
	direction. (Default = 4096.)
	<max_history_rx> Decimal number 2048 to 4096 that specifies the
	maximum size of the history buffer to be negotiated in the receive direction.
	(Default = 4096.)
Report Commands:	+DS44? Reports Current or Selected Values.
	Response:
	+DS44:<direction>,<compression_negotiation>,<capability>,
	<max_codewords_tx>,<max_codewords_rx>,<max_string_tx>,
	<max_string_rx>,<max_history_tx>,<max_history_rx>
	Example: +DS44:3,0,0,2048,2048,32,32,4096,4096 For the
	default setting.
	+DS44=? Reports Supported Range of Parameter Values.
	Response: +DS44:(list of supported <direction> values),(list of
	supported <compression_negotiation> values),(list of supported
	<capability> values),(list of supported <max_codewords_tx>
	values),(list of supported <max_codewords_rx> values),(list of
	supported <max_string_tx> values),(list of supported
	<max_string_rx> values),(list of supported <max_history_tx>
	values),(list of supported <max_history_rx> values)

Command: +DR	Data Compression Reporting
Description:	This extended-format numeric parameter controls whether or not the
	extended-format +DR: intermediate result code is transmitted from the
	modem to the DTE. S95 bit 5 is reset to 0 for +DR=0 and is set to a 1 for
	+DR=1. The more recent setting of +DR or S95 bit 5, and the W command
	setting, determines the actual data compression result code reporting (see
	S95 Parameter and W Command).
Defined Values:	+DR0	Data compression reporting disabled (no +DR result code
		transmitted).
	+DR1	Data compression reporting enabled (+DR result code
		transmitted). (Default.)
Report Commands:	+DR?	Reports Current or Selected Values.
		Response: +DR: <current value>
		Example: +DR: 1 For the default setting.
	+DR=? Reports Supported Range of Parameter Values.
		Response: +DR: (<value> range)
		Example: +DR: (0,1)
Intermediate Result Code:	+DR:	<type>
	The +DR: <type> reported represents the current (negotiated or

renegotiated) modem-modem data compression type. If enabled, the intermediate result code is transmitted at the point after error control negotiation (handshaking) at which the modem has determined which data compression technique will be used (if any) and the direction of operation. The +DR intermediate result code, if enabled, is issued after the Error Control Report (+ER) and before the final result code (e.g., CONNECT).

Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 61