Intel MD566X manual 0,471, +DS44=m 972,140, 140,1884 3768

56K V.92 Data, Fax, and Voice Chipset

Table 4-2. V.44 / V.42 / V.42 bis and MNP Data Mode Command Descriptions

3,0,0,471,

V.44 Data Compression: This command controls the V.44 data compression func- tion if provided in the DCE. It accepts the following subparameters:

m=[<direction>[,<compression_negotiation>[,<capability>[,<max_codewords_tx>[,<m ax_codewords_rx>[,<max_string_tx>[,<max_string_rx>[,<max_history_tx>[,<max_his tory_rx>]]]]]]]]]

<direction>, which specifies the desired direction(s) of operation of the data compression function; from the DTE point of view;

<compression_negotiation>, which specifies whether or not the DCE should continue to op- erate if the desired result is not obtained;

<capability>, which specifies the use of stream method, packet method, multi- packet method;

<max_codewords_tx>, which specifies the maximum number of codewords which should be negotiated in the transmit direction;

<max_codewords_rx>, which specifies the maximum number of codewords which should be negotiated in the receive direction;

<max_string_tx>, which specifies the maximum string length to be negotiated in the transmit direction;

<max_string_rx>, which specifies the maximum string length to be negotiated in the receive direction;

<max_history_tx>, which specifies the maximum size of the history buffer to be negotiated

+DS44=m

972,140,

in the transmit direction;

140,1884,

3768

<max_history_rx>, which specifies the maximum size of the history buffer to be negotiated in the receive direction.

<direction>: (Default = 3)

m = 0	Negotiated ... no compression
m = 1	Transmit only
m = 2	Receive only
m = 3	Both directions, accept and direction
<compression negotiation>: (Default = 0)
m = 0	Do not disconnect if REC. V.44 is not negotiated by the remote DCE as
	specified in <direction>. Alway set to 0.
<capability>: (Default = 0)
m = 0	Stream method
m = 1	Packet method
m = 2	Multi-packet method

<max_codewords_tx>: (Default = 471) 256 to 65536

<max_codewords_rx>: (Default = 942) 256 to 65536

<max_string_tx>: (Default = 140) 32 to 255

<max_string_rx>: (Default = 140) 32 to 255

<max_history_tx>: (Default = 1884) ≥ 512

<max_history_rx>: (Default = 3768) ≥ 512

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