Viavi's AI data-center testing business is running ahead of plan. Q4 revenue of $443.1M and a 24.0% operating margin topped the high end of guidance, data center more than doubled year over year excluding Spirent, and the Q1 guide of $450M-$460M and $0.40-$0.42 EPS beats a $432M and $0.28 street. The $500M quarter moved up to calendar 2027 from fiscal 2028. CEO Oleg Khaykin called CPO yield-delay worries nonsense, since yield problems mean more testing, with CPO revenue starting this quarter. x.com x.com