Telstra staff unaware of mass outage risk as critical software failure ‘rippled slowly across the network’ The GuardianTelstra concedes 15-year-old, $30,000 device responsible for outage SMH.com.auVIDEO: US claims strikes on Iranian targets ABC News & Headlines – Australian Broadcasting CorporationMistakes that led to Telstra triple-0 outage News.com.au‘I am deeply sorry’: Telstra chief apologises again for outage The Australian