AT Commands Phone Terminal Terminated
50
AT+CHLD
Call Hold and Multiparty
Parameters:
<n>:
<n>
Description
0
Disables the unsolicited result code
Default setting
1
Enables the unsolicited result code
<mode>:
<mode>
Description
0
Disable
1
Enable
2
Query status
<class
x
>:
<class
x
>
Description
1
Voice L1
2
Data
4
Fax
128
Voice L2
Response when
<mode>=2:
+CCWA: <status>,<class1>
[+CCWA: <status>,<class2>
[...]]
<status>:
<status>
Description
0
Not active
1
Active
Description:
Requests call-related supplementary services. Refers to a service that allows a call to be
temporarily disconnected from the ME but the connection to be retained by the
network, and to a service that allows multiparty conversation. Calls can be put on hold,
recovered, released and added to a conversation.
Set command:
AT+CHLD=
<n>
Test command:
AT+CHLD=?
Shows if the command is supported.
Test command
response:
+CHLD: (list of supported <n>s)
Parameter:
<n>:
<n>
Description
0
Releases all held calls, or sets User-Determined User Busy
for a waiting call
1
Releases all active calls and accepts the other (waiting or
held) call