Hi dear engeneers!
How can I use UART(see image in att.) on this board? Standard UART-to-RS232 converter does not work, a feeling that UART switchoff by program method, please tell me how can I use it(what port speed, stop bits etc ...)? Thank U.

Good day! In general: From the point of view of the electrical connection interface is connected and fully functional. The interface is blocked by software. Lock in the bootloader(RouterBOOT®) and operating system(RouterOS®). This knowledge is enough to turn it on. Thank you all for the silence!

P.S. Absolutely not clear what they want to achieve marketing of Mikrotik those stupid lock ... I like in general would not buy a series of boards if not found a way to unlock UART ...

My problem as well.. They use it to initial loading of Bootloader and inserting instructions..