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
<classx>:
<classx> 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
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