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SIM800 Series_AT Command Manual_V1.09

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.

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.

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