Three aging Microchip Technologies SSU 2000 NTP servers, models dating to the early 2000s, took down Telstra's entire national network on July 8th, 2026, cutting off 8.8 million Australians from calls and data. The trigger: a routine 3:38 AM reboot of the Melbourne unit during a backup power feed replacement. The server had a known GPS week rollover bug. It came back online reporting the year as 2006, not 2026, and the cascading time corruption brought the whole 4G and 5G network to its knees.
Telstra knew about the bug. That is the part worth sitting with. The server had also quietly drifted from its intended Stratum 3 configuration, losing its upstream Stratum 2 reference at some unknown point in the past two decades and falling back onto its onboard GPS card, the very component carrying the rollover defect. Nobody caught it. Nobody replaced the hardware. Victoria's V/Line rail services stopped running because train communications depended on the same dead network.
The full article traces exactly how a single undocumented configuration drift, compounded by a documented and ignored firmware bug, propagated failure across a continent-scale system. Read it for the technical chain of custody, not just the punchline.
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