Intel MD566X User Manual
Page 71
56K V.92 Data, Fax, and Voice Chipset
Programmer’s Guide
Intel Confidential
71
+DS44=m
3,0,0,471,
972,140,
140,1884,
3768
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
in the transmit direction;
<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
Table 4-2.
V.44 / V.42 / V.42 bis and MNP Data Mode Command Descriptions