Data Sheet

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 45 2015-08-03
detection are both disabled.
1 CONNECT<text> result code only returned, dial tone and
busy detection are both disabled.
2 CONNECT<text> result code returned, dial tone
detection is enabled, busy detection is disabled.
3 CONNECT<text> result code returned, dial tone
detection is disabled, busy detection is enabled.
4 CONNECT<text> result code returned, dial tone and
busy detection are both enabled.
Parameter Saving
Mode
AT&W_SAVE
Max Response
Time
-
Reference
V.25ter
Note
2.2.27 ATZ Reset Default Configuration
ATZ Reset Default Configuration
Response
TA sets all current parameters to the user defined profile.
OK
ERROR
Execution
Command
ATZ[<value>]
Parameters
<value> 0 Restore profile 0
Parameter Saving
Mode
NO_SAVE
Max Response
Time
-
Reference
V.25ter
Note
Parameter impacted by Z command: refer to AT&W
NOTE:
Parameters related to uart operation, like csclk, ipr, icf, ifc and cmnrp, will not be reset to
default configuration.
2.2.28 AT&C Set DCD Function Mode
AT&C Set DCD Function Mode
Execution
Command
AT&C<value>
Response
This parameter determines how the state of circuit 109 (DCD) relates to the
detection of received line signal from the distant end.