Vicki Brady grilled at first public appearance since returning from overseas as SA police say call to triple zero failed before death Follow our Australia news live blog for latest updates Get our breaking news email, free app or daily news podcast Telstra has admitted it knew of the dangers of a failure of its time systems and is now investigating why backup measures failed to stop this weeks outage, as its chief executive says she’s “deeply sorry” about its impacts. It came as South Austral