Stuff we've discussed on IRC.
Posted by ats at 2007-08-23 23:25
"On Sunday 5th August 2007 BBC Radio suffered a major breakdown in its national distribution network, affecting the Corporation's FM and AM national radio networks over much of the country. [...] In Radio 1's case, the RBS didn't work either, causing the network to go silent over most of the country for about 35 minutes."
Turns out it was Siemens' fault, and they'd made a classic mistake: two supposedly-independent links actually shared a common point of failure.
And why did they share a common point of failure? Because part of the primary link had been replaced by an alternate route through the backup link during maintenance a couple of weeks beforehand...
(It's not explained why the RBS system didn't work, although the Siemens author does speculate on how much worse it could have gone if the lift condition had got any worse.)