56K Softmodem
Command Reference
- 37
Table 3-60: +DR Data Compression Reporting Intermediate Result Codes
Table 3-61: +DR Extended Syntax Commands
+DS=<direction>,<compression_negotiation>,<max_dict>,<max_string>—V.42
bis
Data Compression
Use the
+DS
command to configure the V.42
bis
data compression method used
by the modem. The settings of this command overwrite the setting of a
%C<value>
command. However, it can also be overwritten by
%C<value>
command.
Result codes:
OK
if <direction> = 0—3 and <compression negotiation> = 0 and <max_dict> =
512, 1024, 2048 and <max_string> = 6—32.
ERROR
if <direction> does not equal 0—3 or <compression negotiation> does
not equal 0 or <max_dict> does not equal 512, 1024, 2048 or <max_string> does
not equal 6—32.
The <direction> parameter sets which directions use the compression method.
The 56K Softmodem uses compression in one or both directions.
Result Code
Description
+DR: NONE
Data compression is not in use.
+DR: V42B
V.42
bis
is in use in both directions.
+DR: V42B RD
V.42
bis
is in use in the receive direction.
+DR: V42B TD
V.42
bis
is in use in the transmit direction.
+DR: V44
V.44 is in use in both directions.
+DR: V44 RD
V.44 is in use in the receive direction.
+DR: V44 TD
V.44 is in use in the transmit direction.
Command Description
+DR=<value>
Turns the data compression report result code on or off.
+DR?
Displays the current status of the data compression report result code.
+DR=?
Displays all of the supported values for the <value> parameter.
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