User guide

Part 1 – Commands for All Universal IP Devices Chapter 1 – General AT Commands for All Universal IP Devices
Universal IP AT Commands Reference Guide (Document S000457H) 18
Z – Default Configuration
Description: This command restores the configuration profile from NVM. Settings are recalled on power up.
Syntax: ATZ
Response: OK (Command valid)
&C – RLSD (DCD) Option Turn On or Off
Description: The modem controls the RLSD output in accordance with the parameter supplied. This
command sets the DCD On or Off.
Syntax: AT&C<value>
Values: 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.
Default: 1
Response: OK
Otherwise ERROR
&D – DTR Option
Description: The modem reads the DTR to determine if the Data Terminal is Ready. This command allows the
modem to act on the DTR.
Syntax: AT&D<value>
Values: 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
Default: 0
Response: OK
Otherwise ERROR
&F – Reset Factory Defaults
Description: 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.
Syntax: AT&F
Values: None
&S – DSR ON or OFF
Description: This command sets the DSR to ON of OFF.
Syntax: AT&Sx where x=0,1,2,?
Values: 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
Display: AT&S? Displays the current setting or use AT#VALL to view all settings.
Default: 1
Response: OK
Otherwise ERROR