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WCDMA Module
24
3.17 +ZFLSH Send Flash/Flash with Information
Descriptions
The command is used to send a Flash/Flash with information to the base station,
and it is usually used for call waiting and conference call. When receiving a call from a
third party, use AT+ZFLSH command to send FLASH signals to switch between two
differenct lines. If one FLASH signal is sent to the base station, the module will return
with +ZFLSH. Please note that this doesn’t guarantee the switching between two lines
for CDMA network because the network does not return the confirmation to the
module. In a conference call, define the first called party as the first party, dial the first
party, use AT+ZFLSH=< second called party’s number to call the second party, and
the first party would automatically enter the call held status; once the second call is
connected, use AT+ZFLSH command to realize the conference call. If you send a
FLASH signal again, it will disconnect the call from the second party. Use ATH
command to hang up all calls.
Format
AT+ZFLSH
AT+ZFLSH=<phone number>
ATD13333333333
;
Originate a voice call
OK
+ZCORG
:
13333333333
+ZCCNT
:
3
+CCWA
:
”26010681”,129 the second incoming
call
AT+ZFLSH
Send a FLASH signal to
switch to the second call
OK
+ZFLSH
Not every switching is always successful
Example
ATH
Release all calls
OK
+ZCEND
:
10
ATD13316819064
;
Connect the first voice call
OK
+ZCORG
:
13316819064
+ZCCNT
:
3
AT+ZFLSH=26010681
Hold the first call and dial the
second call
OK
+ZFLSH
AT+ZFLSH
Realize a conference call
OK
+ZFLSH
AT+ZFLSH
Hold the second call and
switch to the first call
OK
+ZFLSH
(
parameter is a must
)
ATH
Hang up all calls
OK
+ZCEND
:
10
3.18 +VGT Transmit gain selection
Description The command is used to set MIC gain of currently selected audio path.
Format AT+VGT=<MicGain>
Example AT+VGT=2
OK