fault signal, trouble tone
emergency signal, alarm signal
alarm вчт., alarm signal, emergency signal
emergency signal, safety signal
alarm, alert message, alarm signal, emergency signal
"The truth is more important than the facts."
Frank Lloyd Wright
"Nothing makes one feel so strong as a call for help."
Pope Paul VI
"You can get assent to almost any proposition so long as you are not going to do anything about it."
"Everything popular is wrong."