Specifications

UC864-E/G/WD/WDU AT Commands Reference Guide
80304ST10041a Rev. 7 - 2010-10-14
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 56 of 318
3.5.3.5. Compression Control
3.5.3.5.1. Data Compression - +DS
+DS - Data Compression
AT+DS=[<dir>[,<neg
>[,<P1>[,<P2>]]]]
Set command sets the V42 compression parameter.
Parameter:
<dir>. : desired direction of operations
0 - no compression (factory default)
1 - Transmit only.
2 - Receive only.
3 - Both directions, accept any direction.
<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 (Factory default is 2048)
<P2) : the maximum string length
6 – the only supported value
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>
AT+DR? Read command returns current value of <n>.