Telic LT910-WW - Configuration of the Bit Rate on the Serial Interface; Power off the Modem

LT910-WW User Manual - Telic AG
Pg 21
Although this will not be an issue in almost all typical applications of the modem, there are a few
cases in which the modem might not recognize the power up signal. This is no failure of the
modem itself, the same would apply to almost any electronic device that provides a separate
“power on” or “reset” signal.
Possible cases are the following:
 Large capacitors in your power supply which will lead to slow leading and falling edges
(issue does not apply with modern stabilized switching regulator power adaptors) and
 Slow analogue signals used to assert TO_IN
If you are in doubt, please:
 Use the mains power adapter that is provided by your distributor and is known to work
properly with your modem.
 Make sure that your signal and system design is according to the above.
5.2 Configuration of the bit rate on the serial interface
Please note that the module used in the terminal does not support autobauding.
The default data rate is 115200 baud, 8 data bits, 1 stop bit, parity none.
Other rates are programmable.
5.3 Power off the modem
Warning
Powering OFF the module should be done gracefully allowing the module to
complete all ongoing and pending tasks while properly handling all memory
buffers.
Don’t interrupt this process by disconnecting the power source to early.
This avoids device damage and consequently void the warranty.
It normally takes more than 15 seconds to de-attach from the network and close the
LE910C1-WX internal filesystem properly.
There are three ways to switch off (power down) the modem as described below:
 Power down command, most preferred way:
AT command: AT#SHDN
 Fast power down:
In the event of an unwanted power supply loss, LE910Cx can be switched off without any
risk of filesystem data corruption by implementing fast power down feature. The fast