Specifications

HE863 family AT commands reference guide
80377ST10083a Rev.4 – 2012-02-01
Reproduction forbidden without written authorization from Telit Communications S.p.A.- All Rights Reserved. Page 43 of 228
3.5.2.4. Modulation Control
3.5.2.4.1. Modulation Selection - +MS
+MS - Modulation Selection
AT+MS=
<carrier>
[,<automode>
[,<min_rate>
[,<max_rate>]]]
Set command has no effect is included only for backward compatibility with
landline modems.
Parameters:
<carrier> - a string which specifies the preferred modem carrier to use in
originating or answering a connection
V21
V22
V22B
V23C
V32
V34
<automode> - it enables/disables automatic modulation negotiation.
0 - disabled
1 - enabled. It has effect only if it is defined for the associated modulation.
<min_rate> - it specifies the lowest value at which the DCE may establish a
connection.
0 - unspecified
<max_rate> - it specifies the highest value at which the DCE may establish a
connection.
0 - unspecified
300..14400 - rate in bps
Note: to change modulation requested use +CBST command.
AT+MS?
Read command returns the current value of <carrier>, <automode>, <min_rate>,
<max_rate> parameters.
AT+MS=?
Test command returns all supported values of the <carrier>, <automode>,
<min_rate>, <max_rate> parameters.
3.5.2.4.2. Line Quality Monitor And Auto Retrain Or Fallback/Fallforward - %E
%E - Line Quality Monitor And Auto Retrain Or Fallback/Fallforward
AT%E<n>
Execution command has no effect and is included only for backward compatibility
with landline modems.