Telstra blames missing software update and undocumented design change for massive outage

Telco outlines reasons for network failure that hit mobiles, trains and retailers ahead of appearance at Senate inquiry Follow our Australia news live blog for latest updates Get our breaking news email, free app or daily news podcast Telstra has blamed the lack of a software update for a key time-keeping system for outage that caused nation-wide chaos last week, with its maintenance teams also unaware of a design change that affected how it would reset. Ahead of an appearance by its chief…