Telstra CEO Vicki Brady returned after a break on July 9 as the company struggled with a nationwide network outage.
The failure suspended Triple Zero emergency calls and swayed transport systems.
Brady gave a public apology and said investigations are ongoing to find the cause.
The outage has led to transport delays nationwide.
Media and regulators are observing her response and future actions.
The incident sparked a chain of failures in Telstra’s core network, causing loss of voice and data services for millions of customers.
Emergency responders noted difficulty reaching callers.
Government officials called for a full report.
Brady committed to strengthen systems and rebuild trust.