Hi,now i managed to send the sending break command with putty from windows.Do you know from terminal minicom not worked the sending break ?Do you know any terminal for ubuntu that not have this problem ?Thanks a lot for the help.

Hi,sorry for my cisco me-3400g-12cs-a the procedure not work.I connect with serial port to cisco cisco me-3400g-12cs-a e when is boot, before initialising the boot i press ctrl f and more time but not work for me.Can you help me please ?