The latest disruption on Sunday, caused by a faulty tower south of Sydney, interrupted emergency calls and affected around 4,500 people. Singtel CEO Yuen Kuan Moon, who was summoned from Singapore to meet with Australian authorities, said it would take time for Optus CEO Stephen Rue to transform the No. “We brought in Stephen 11 months ago to transform Optus, to really address the issues that we had since 2022-23,” Yuen told reporters in Sydney after a meeting with Communications Minister Annika Wells. Sign Up Sign UpThe latest disruption on Sunday, caused by a faulty tower south of Sydney, interrupted emergency calls and affected around 4,500 people. Former Optus CEO Kelly Bayer Rosmarin was ousted over a nationwide outage of Optus services in 2023.