Comtrol AT Command Set Rev A - Manual (Page 94)

AT Commands Reference Manual
Conexant 100722B
3-68
+DS44 - V.44 Compression Select
This extended-format compound parameter controls the V.44 data compression function.
Syntax
+DS44=[<direction>[,< compress_negotiation >[,<capability>[,<max_codewords_tx>
[,<max_codewords_rx>[,<max_string_tx>[,<max_string_rx>[,<max_history_tx>
[,<max_history_rx>]]]]]]]]]
Defined Values
<direction> Decimal number that specifies the desired direction(s) of
operation of the data compression function; from the DTE
point of view.
0
Negotiated, no compression.
1 Transmit only.
2 Receive only.
3 Both directions, accept any direction. (Default.)
<compress_negotiation> Decimal number that specifies whether or not the modem
should continue to operate if the desired result is not
obtained.
0
Do not disconnect if V.44 is not negotiated by
the remote DCE as specified in <direction>.
(Default.)
1 Disconnect if V.44 is not negotiated by the
remote DCE as specified in <direction>.
<capability> Decimal number that specifies the use of stream method,
packet method, multi-packet method.
0
Stream method. (Default.)
1 Packet method.
2 Multi-packet method.
<max_codewords_tx> Decimal number from 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 from 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 from 32 to 255 that specifies the
maximum string length to be negotiated in the transmit
direction. (Default = 32.)
<max_string_rx> Decimal number from 32 to 255 that specifies the
maximum string length to be negotiated in the receive
direction. (Default = 32.)
<max_history_tx> Decimal number from 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 from 2048 to 4096 that specifies the
maximum size of the history buffer to be negotiated in the
receive direction. (Default = 4096.)