AT Commands Set

SIM5320 AT Command Set
Execution Commands
ATA
Responses
For voice call:
OK
VOICE CALL: BEGIN
For data call, and TA switches to data mode:
CONNECT
No connection or no incoming call:
NO CARRIER
Examples
ATA
VOICE CALL: BEGIN
OK
4.8 +++ Switch from data mode to command mode
Description
The command is only available during a connecting CSD call or PS data call. The +++ character
sequence causes the TA to cancel the data flow over the AT interface and switch to Command
Mode. This allows to enter AT commands while maintaining the data connection to the remote
device.
NOTE To prevent the +++ escape sequence from being misinterpreted as data, it must be preceded
and followed by a pause of at least 1000 milliseconds, and the interval between two ‘+’ character
can’t exceed 900 milliseconds.
SIM PIN References
YES V.25ter
Syntax
Execution Command Responses
+++ OK
Examples
+++
OK
4.9 ATO Switch from command mode to data mode
Description
SIM5320_ATC_V1.24 42
8/14/2012