SimCom SIM7500 Series

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SIM7500_SIM7600 Series_AT Command Manual_V1.07 2017-12-25
108
6 AT Commands for Call Control
6.1 AT+CVHU Voice hang up control
Description
Write command selects whether ATH or “drop DTR
” shall cause a voice connection to be
disconnecte
d or not. By voice connection is also meant alternating mode calls that are currently in
voice mode.
SIM PIN References
NO 3GPP TS 27.007
Syntax
Test Command
Responses
AT+CVHU=? +CVHU: (list of supported <mode>s)
OK
Read Command Responses
AT+CVHU? +CVHU: <mode>
OK
Write Command Responses
AT+CVHU=<mode> OK
ERROR
Execution Command Responses
AT+CVHU Set default value:
OK
Defined values
<mode>
0 – “Drop DTR” ignored but OK response given. AT H disconnects.
1 – “Drop DTR” and ATH ignored but OK response given.
Examples
AT+CVHU=0
OK
AT+CVHU?
+CVHU: 0
OK
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