"Today, Optus advised the government that information it previously provided to the Australian Communications and Media Authority, the Senate and the public about the number of unsuccessful triple-zero calls from mobiles during its nationwide outage on 8 November 2023 was not accurate," she said on Tuesday. More than 10 million Optus customers were without phone and internet access for up to 14 hours on November 8. Optus says it is apologising to customers over a triple zero failure during an outage. (Joel Carrett/AAP PHOTOS) The telco blamed a software upgrade for the network breakdown, while the fallout triggered the resignation of Optus chief executive Kelly Bayer Rosmarin. Optus previously disclosed that only 229 calls from mobiles to triple-zero did not reach the Emergency Call Person (Telstra). The telco said a recent review revealed an additional 2468 customers made unsuccessful triple zero calls from the network. Optus interim CEO Michael Venter said the company was apologising to affected customers.