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Part 1 – Commands for All Universal IP Devices
&C – RLSD (DCD) Option Turn On or Off
Chapter 1 – General AT Commands
Description:
Syntax:
Values:
Default:
The modem controls the RLSD output in accordance with the parameter supplied. This
command sets the DCD On or Off.
AT&C<value>
0 – Sets DCD to remain On at all times.
1 – Sets DCD to follow the physical connection.
2 – DCD follows the state of the TCP/UDP connection.
1
Result Codes: OK
Otherwise ERROR
&D – DTR Option
Description:
Syntax:
Values:
Default:
The modem reads the DTR to determine if the Data Terminal is Ready. This command allows the
modem to act on the DTR.
AT&D<value>
0 – DTR is ignored.
1 – An Active to Inactive transition disconnects an active TCP/UDP connection
2 – (For Non-MT100SEM) An active to inactive transition disconnects the physical connection
0
Result Codes: OK
Otherwise ERROR
&F – Reset Factory Defaults
Description:
Syntax:
Values:
For MT100SEM: This command replaces all settings with the factory defaults but does not store
them to memory. Use &W to store them to the memory.
For NON-MT100SEM: This command replaces the factory defaults of &D, &S, &C, E, and V only.
Note: The module must be RESET to put this command into effect.
AT&F
None
&S – DSR ON or OFF
Description:
Syntax:
Values:
Display:
Default:
This command sets the DSR to ON of OFF.
AT&Sx where x=0,1,2,?
AT&S0 Sets DSR to remain ON at all times
AT&S1 Sets DSR to follow DCD
AT&S2 DSR follows the state of the TCP/UDP connection
AT&S? Displays the current setting or use AT#VALL to view all settings.
1
Result Codes: OK
Otherwise ERROR
Universal IP AT Commands Reference Guide (Document S000457G)
11
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