... 'sixties technology so I assume that it's all 50 baud teleprinters sending preformatted messages. But... Triggering some sort of automated telephone warning is trivial compared to send ing a secure and unjamable 'launch' signal across the Atlantic. The main problem is that once a definite 'attack' signal had been sent it couldn't be recalled, which is why the system very nearly ...

...been going on recently: it's been happening even if I've been sitting at the other end of the room. But maybe one of those media buttons got jammed down for a day and has now somehow unjammed itself? If that's the cause I don't know what I can do if it happens again, because that section of the keyboard isn't replaceable (unlike the section where the typing keys are). :-( Dave ...