Telco’s botched firewall upgrade left emergency callers unable to connect Australia's telecommunications regulator is investigating an outage at Optus after an upgrade went wrong and network monitoring failed to spot the problem.

A telco outage in Australia led to four deaths. It's a startling reminder of how reliant we are on critical infrastructure providers and how connected our systems are. One failure can lead to many unforeseen downstream effects. www.networkworld.com/article/4061... #CIOsky #optus #criticalindustry