SARA-R4/N4 series-AT Commands Manual
UBX-17003787 - R09

6Call control
Page 38 of 307
6.2î™–î™–î™–î™–Call answer A
A
Modules SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412M
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
full No No No < 20 s +CME Error
6.2.1î™–î™–î™–î™–Description
Instructs the DCE to immediately connect to the line and start the answer sequence as specified for the
underlying DCE. Any additional command that appears after A on the same command line is ignored. The
command is abortable.
SARA-R4
The user is informed that an incoming call is waiting, by the RING IRC.
6.2.2î™–î™–î™–î™–Syntax
Type Syntax Response Example
Action ATA RING
OK
6.3î™–î™–î™–î™–Hook control H
H
SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412MModules
SARA-N4
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
full No No No < 20 s -
6.3.1î™–î™–î™–î™–Description
Disconnects the remote user. In case of multiple calls, all the active calls and held calls are released while the
waiting calls are not.
In case of dual service calls, the command will switch the call from data (if different from fax) to voice.
If the module has a PDP context activated and is in On-Line Command Mode (OLCM), the command
deactivates the context. During the PSD OLCM an incoming CS call can be accepted with an ATA
command. Subsequent ATH command releases the current CS call while leaving the PDP context
activated. In this state a second ATH command also deactivates the PDP context.
6.3.2î™–î™–î™–î™–Syntax
Type Syntax Response Example
Action ATH OK
6.4î™–î™–î™–î™–Automatic answer S0
S0
Modules SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412M
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
partial No Profile No - +CME Error
6.4.1î™–î™–î™–î™–Description
Controls the automatic answering feature of the DCE. If set to 0, the automatic answering is disabled,
otherwise it causes the DCE to answer when the incoming call indication (RING) has occurred the number of
times indicated by the value.
For an incoming CSD call, if the autoanswering is enabled and the <value> parameter of &D command is
set to 2, the autoanswering only works if the DTR line of the AT interface with activated autoanswering
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