US Robotics 56 K SOFTMODEM - COMMAND REFERENCE REV 1 Uživatelský manuál stáhnout pdf (Strana 43)

56K Softmodem

Command Reference

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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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US Robotics 56 K SOFTMODEM - COMMAND REFERENCE REV 1 Uživatelský manuál Strana 43