Re: What about Power Failures?
"BTW us in telecoms have had active / active standby for a very long time, its how we roll"
Which works really well, until it doesn't.
At which point you may discover that whilst the running systems were ok, what's in the configuration (and has been backed up to tape for the last 2 years) is scrambled. So if you reboot one controller after the other when applying your y2k fixes, you find your NEAX-61E has forgotten that it's a telephone exchange - and that after spending 2 days finding a working backup (3 years old), you then have to replay every update made from that point - which takes 6 weeks - and means that a large number of your customers can't be sure from day to day what their phone number might be - or even if they'll have dialtone.
Yes, it happened.