User Manual

SARA-R4 series-AT commands manual
UBX-17003787 - R16
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10V24 control and V25ter
Page 105 of 401
10V24 control and V25ter
10.1Introduction
These commands, unless specifically stated, do not implement set syntax using "=", read ("?"), or test ("=?").
If such commands are used, the "+CME ERROR: unknown" or "+CME ERROR: 100" error result code is provided
(depending on the +CMEE AT command setting).
10.2Circuit 109 behavior &C
&C
Modules All products
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
full No No No - +CME Error
10.2.1Description
Controls how the state of RS232 circuit 109 - Data Carrier Detect (DCD) - relates to the detection of received
line signal from the remote end.
10.2.2Syntax
Type Syntax Response Example
Action AT&C[<value>] OK
10.2.3Defined values
Parameter Type Description
<value> Number Indicates the behavior of circuit 109
• 0: DCE always presents ON condition on circuit 109
• 1 (default value and factory-programmed value): circuit 109 changes in accordance
with the Carrier detect status; ON if the Carrier is detected, OFF otherwise
10.2.4Notes
• See the corresponding module system integration manual for the DCD behavior during the initialization
phase of the module.
10.3Circuit 108/2 behavior &D
&D
Modules All products
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
full No No No - +CME Error
10.3.1Description
Controls how the state of RS232 circuit 108/2 - Data Terminal Ready (DTR) - relates to changes from ON to
OFF condition during on-line data state.
10.3.2Syntax
Type Syntax Response Example
Action AT&D[<value>] OK
10.3.3Defined values
Parameter Type Description
<value> Number Allowed values: