
SARA-R4/N4 series - AT Commands Manual
UBX-17003787 - R09
10 V24 control and V25ter
Page 94 of 307
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
AT command setting).
10.2 Circuit 109 behavior &C
&C
SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412M
Modules
SARA-N4
Syntax
PIN required
Settings saved Can be aborted
Response time Error reference
Attributes
full
No
No
-
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
SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412M
Modules
SARA-N4
Syntax
PIN required
Settings saved Can be aborted
Response time Error reference
Attributes
full
No
No
-
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