Ds - Set Data Compression Function; Dr - Data Compression Report Level - Iridium 9523 Developer's Manual

Iridium Communications, Inc.
Iridium 9523 Product Developers' Guide
Revision 2.6
Read Command: +CR?
Query the current service reporting level settings. The response is in the form:
+CR: <mode>
Test Command: +CR=?
List the supported reporting levels. The response is in the form:
+CR: (supported <mode>s)

5.7.31 +DS - Set Data Compression Function

Set Command: +DS=[<direction>[,<comp_neg>[,<max_dict>[,<max_string]]]]
Set the V.42bis data compression function.
<direction> can take on the following values:
0 No compression
1 Transmit only
2 Receive only
3 Both directions (default)
<comp_neg> can take on the following values:
0 Do not disconnect if V.42bis is not negotiated by the remote DCE as specified in
<direction> (default)
1 Disconnect if V.42bis is not negotiated by the remote DCE as specified in <direction>
<max_dict> can take on the following values: 512 to 2048. Default is 512.
<max_string> can take on the following values: 6 to 250. Default is 6.
Read Command: +DS?
Query the current data compression parameter settings. The response is in the form:
+DS: <direction>,<comp_neg>,<max_dict>,<max_dict>
Test Command: +DS=?
List the supported data compression parameters. The response is in the form:
+DS: (supported <direction>s),(supported <comp_neg>s,(supported <max_dict>s),(supported
<max_dict>s)
Data compression will not work if IRLP is in unacknowledged mode.
Note: The register is not updated right after the user requests new values because the requested values
may or may not be what IRLP will use once a data call is established due to negotiations with the other
peer. If the register is updated right away, this may give the user the impression that those values will be
used during the data call, but there is no guarantee that will be the case. The real values will only be
known once a data call is established and the negotiation phase is done. For that reason, the values are
written to the register only after a call is established and both sides have negotiated parameter values.
The value of the register will be reset to default value (3) after the call is completed.

5.7.32 +DR - Data Compression Report Level

Set Command: +DR=[<mode>]
Set the data compression reporting level.
Iridium Communications, Inc.
Proprietary & Confidential Information
Only
Information Contained in this Guide
is Subject to Change Without Notice
Page 43 of 115
Distribution of Guide Restricted
to Product Developers