Oh well, thats because Optus is owned by Singtel to operate in Australia. The 13 hours outage caused Emergency Hotline to be down and the root cause was due to the upgrade of the Firewall. Because of the downtime, people who require emergency support could not call the hotline and ended up 3 deaths in Australia. Well, i have no words to describe this, but in terms of technology, sometimes old technology tend to be more reliable. But I hope more rollback plans were in place to prevent such incidents to happen. People rely on these services very much all the time and communication is critical.
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