SIM5350 AT Command Set
SYNC synchronous transparent
REL ASYNC asynchronous non-transparent
REL SYNC synchronous non-transparent
VOICE normal voice
VOICE/XXX voice followed by data(XXX is ASYNC, SYNC, REL ASYNC or REL
SYNC)
ALT VOICE/XXX alternating voice/data, voice first
ALT XXX/VOICE alternating voice/data, data first
GPRS GPRS network request for PDP context activation
Examples
AT+CRC=1
OK
AT+CRC?
+CRC: 1
OK
4.7 AT+CVHU Voice hang up control
Description
Write command selects whether ATH or “drop DTR” shall cause a voice connection to be
disconnected 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
OK AT+CVHU=<mode>
ERROR
Defined values
<mode>
SIM5350_ATC_V1.02 6/9/2014
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