Its cyclical, but I have not tried to graph/measure its repetition before now (when I noticed the emails filling up my inbox). Body of tidal water..could be, but I wasn't involved in the installation so I can't actually tell where the antennas are pointing. Sent from my BlackBerry wireless device from MTN -----Original Message----- From: William Waites <wwaites@tardis.ed.ac.uk> Date: Sun, 01 Dec 2013 20:14:46 To: <notify.sina@gmail.com> Cc: <nanog@nanog.org> Subject: Re: Is there a method or tool(s) to prove network outages? On Sun, 1 Dec 2013 17:56:51 +0100, Notify Me <notify.sina@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