Hello,
Yes, you can. However, before upgrading the firmware, you will need to upgrade router's bootloader.
Here is detailed step-by-step instructions how to upgrade router's bootloader and firmware:
- First of all please set static IP address on your network interface (e.g. 192.168.1.10)
- Use private/incognito Web browsers window with cleared/disabled cache
- Download latest router's bootloader and firmware version from here ( https://wiki.teltonika.lt/view/RUT9xx_Firmware )
- Power on the device while holding reset button. Flashing all 4 Ethernet LEDs indicates that bootloader’s webserver has started.
- Access router via web browser http://192.168.1.1/uboot.html
- Upload new bootloader's fw "uboot_for_tlt_rut900_3.0.1_webui".
- Wait few minutes. Routers LEDs should stop flashing. Only LED with LAN cable connected to that port should be active.
- Power off the device.
- Power on the device while holding reset button again.
- Access router via web browser http://192.168.1.1/index.html
- Upload new router's firmware "RUT9XX_R_00.06.04.1_WEBUI.bin".
- Wait few minutes. Router's LEDs should stop flashing. Only LED with LAN cable connected to that port should be active.
- Access router via web browser http://192.168.1.1