I'm using this converter:
http://www.tiaowiki.com/w/TIAO_USB_M...r's_Manual
TTL level selector is in correct position. I use pins 1,2 and 12 on TTL connector. I've tried to swap Rx and Tx wires just to test it. Nothing happened. Absolutely same setup was used on the same computer with the same operating system before executing 'eraseall' command. After that I get absolutely nothing on serial port. I still use same serial port settings - 115200 8N1.