UMTS/HSPA/LTE Module Series
UMTS<E EVB User Guide
UMTS<E_EVB_User_Guide Confidential / Released 29 / 32
4.2. Power Off UMTS<E Module
There are several ways to power off UMTS<E module.
One way is to execute AT command AT+QPOWD. It is the best and safest approach. It logs off the
network and saves data before shutdown.
The other way is to press down S302/S301, the module will be shut down.
4.3. Reset UMTS<E Module
The emergency restart option is only used in case of emergency. For example, the software does not
respond for more than 5 seconds due to some serious problems.
Pressing the key S303 (more than 150ms) then releasing it to reset UMTS<E module. This may cause
the loss of information stored in the memory since the reset has been initialized.
4.4. Communication Via USB or UART Interface
4.4.1. Communication via USB Interface
1. Power on the UMTS or LTE module.
2. Connect EVB and PC with USB cable through USB interface, install USB driver from the Driver Disk.
3. Configure AT Command Window, select correct port and operate the UMTS or LTE module via AT
commands.
4.4.2. Communication via UART Interface
1. Install the USB-to-RS232 driver from the Driver Disk.
2. Connect the UART interface to PC with USB-to-RS232 converter cable.
3. Configure AT Command Window, set correct baud rate (such as 115200bps) and COM number
which can be checked by the Device Manager on PC.
4. Power on the UMTS or LTE module and operate the UMTS or LTE module via AT commands.
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