AT Commands Set

SIM5320 AT Command Set
ATO is the corresponding command to the +++ escape sequence. When there is a CSD call or a PS
data call connected and the TA is in Command Mode, ATO causes the TA to resume the data and
takes back to Data Mode.
SIM PIN
YES
References
V.25ter
Syntax
Execution Command
ATO
Responses
TA/DCE switches to Data Mode from Command Mode:
CONNECT
If connection is not successfully resumed or there is not a
connected CSD call:
NO CARRIER
Examples
ATO
CONNECT
4.10 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
AT+CVHU=?
Read Command
AT+CVHU?
Write Command
AT+CVHU=
Responses
+CVHU: (list of supported s)
OK
Responses
+CVHU:
OK
Responses
OK
ERROR
SIM5320_ATC_V1.24 43
8/14/2012