A3LA-R User Guide Version A
Document Number: 451-93156-001A
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Disable sidetone
Query Command:
+CSDT?
This command returns the current transceiver board sidetone generation state. 1 =
enabled, 0 = disabled.
Test Command:
+CSDT=?
Test command returns a list of valid values. Response is in the form:
+CSDT: list of supported modes
B.120 +CHLD
–
C
ALL
H
OLD AND
M
ULTIPARTY
Note:
While this command is implemented in the A3LA-R, it may not yet be supported
in the Iridium network. Stand by for an Iridium Technical Bulletin announcing network
support for this feature.
This command is based on GSM 07.07 [2] subclause 7.12, and is used to invoke the
HOLD and MPTY supplementary services for switching between held calls, etc. The
values of <n> are the same as those that a user can enter via a numeric keypad, as
described in GSM 02.30 [5] subclause 4.5.5.
This command is not abortable, and finishes without waiting for a response from the
network. The interaction of this command with other commands based on other GSM
supplementary services is described in the GSM standard.
The following parameter values are currently supported:
<n>:
Command
Possible Response(s)
+CHLD=
None (command ignored without error)
+CHLD=<n>
When command unsuccessful
+CME ERROR: <err>
When command successful
OK
Test command
+CHLD=?
List of supported <n>s
+CHLD:(0,1,1x,2,2x,3)