Is there a method or tool(s) to prove network outages?

Sun Dec 1 20:14:46 UTC 2013

On Sun, 1 Dec 2013 17:56:51 +0100, Notify Me <notify.sina at gmail.com> said:

    > I have a very problematic radio link which goes out and back on
    > again every few hours.

Is "every few hours" regular/cyclical? Does the radio link cross a
tidal body of water?

-w
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