The move follows the successful trial with Aussie Broadband earlier this year.

Each route has three geographically diverse paths providing redundancy.

400Gbps services should be available the Adelaide-Perth and Melbourne-Hobart routes during the 2024 financial year.

"Data traffic continues to grow on out fixed networks," said Telstra Wholesale executive Steve Long.

High capacity services are vital to help our customers satisfy growing end user demand while also making their networks simple and more efficient.

"Our 400Gbps service is part of a toolkit of connectivity solutions for customers the use our diverse fibre network. With out backhaul experience and rage of services, we can tailor solutions for customers to meet almost any need."