Specifications

UC864-E/G AT Commands Reference Guide

80304ST10041a Rev. 3 - 18/07/08

3.5.3.5 Compression Control

3.5.3.5.1 Data Compression - +DS

+DS - Data Compression

AT+DS=[<dir>[,<ne

g>[,<P1>[,<P2>]]]]

Set command sets the V42 compression parameter.

Parameter:

<dir>. : desired direction of operations

0 - no compression, it is currently the only supported value

1 - Transmit only.

2 - Receive only.

3 - Both directions, accept any direction.

Default is 3.

<neg> : whether the DCE should continue to operate if the desired result is

not obtained.

0 Do not disconnect if V.42 bis is not negotiated by the remote DCE as

specified in <direction>.

<P1> : maximum number of dictionary entries

512-2048

Default is decided by manufacture

<P2) : the maximum string length

Default is 6

AT+DS? Read command returns current value of the data compression parameter.

AT+DS=? Test command returns all supported values of the parameter <n>

Reference V25ter

3.5.3.5.2 Data Compression Reporting - +DR

+DR - Data Compression Reporting

AT+DR=<n> Set command enables/disables the data compression reporting upon

connection.

Parameter:

<n>

0 - data compression reporting disabled;

1 - data compression reporting enabled upon connection.

Note: if enabled, the following intermediate result code is transmitted before

the final result code:

+DR: <compression>

(the only supported value for <compression> is “NONE”)

AT+DR? Read command returns current value of <n>.

AT+DR=? Test command returns all supported values of the parameter <n>

Reference V25ter