Optus has completed a trial of 800 Gigabit Ethernet optical transport between Sydney and Perth, described as Asia’s first end-to-end 800GE link of its kind, using a dual-path design that automatically switches traffic between subsea and terrestrial routes if one path fails. Run on Optus’ live production network, the trial covered roughly 4,700 kilometres along Australia’s longest transcontinental telecommunications corridor.

For Western Australia, a state whose digital infrastructure has historically lagged the more densely connected east coast, the trial represents a meaningful upgrade to the resilience and capacity of the critical data link connecting Perth to the rest of the country and, through it, to international networks and cloud infrastructure.

How the Dual-Path Design Works

The trial combined the INDIGO Central subsea cable, which runs along the ocean floor between Sydney and Perth, with a terrestrial backup route across the Nullarbor, providing two physically diverse paths for the same underlying service. Automatic failover technology shifts traffic between the two routes during an outage or disruption on either path, with Optus designing the system to keep services running with near-zero downtime if one route becomes unavailable.

The trial successfully tested transmission at 800 gigabits per second per wavelength across the full Sydney-Perth distance, demonstrating that 800GE technology can operate reliably across the entire transcontinental span while maintaining dual-route protection, a significant technical achievement given the sheer distance and the geographic diversity required between the subsea and terrestrial paths.

Why the Capacity Upgrade Matters

At 800 gigabits per second, the new service offers eight times the capacity of the 100 gigabit connections that remain common in the wholesale telecommunications market, a substantial jump designed to meet growing demand driven by cloud computing traffic, data centre interconnection, and increasingly data-intensive artificial intelligence workloads that require moving very large volumes of data between sites quickly and reliably.

Telecommunications analysts note that carriers globally have been investing heavily in higher-speed optical transport infrastructure as enterprise customers increasingly demand both denser data links and stronger built-in resilience, rather than treating network capacity and backup protection as separate considerations.

What It Means for WA’s Digital Economy

The Sydney-Perth corridor carries critical data traffic between Australia’s largest population and business centres on the east coast and Perth’s growing role as a data centre and cloud infrastructure hub, making the resilience and capacity of this specific link disproportionately important relative to its geographic remoteness from most of the country’s population. As WA continues attracting new data centre investment and cloud infrastructure, sufficient east-west connectivity capacity becomes an increasingly important piece of the state’s broader digital economy ambitions.

Part of a Broader Investment Cycle

The trial forms part of a broader wave of telecommunications infrastructure investment occurring across Australia, as carriers race to keep pace with surging demand for data capacity driven by cloud migration, streaming services, and the rapid growth of artificial intelligence applications across business and consumer markets alike. Optus has positioned the Sydney-Perth trial as a step toward offering higher-capacity, more resilient services more broadly, rather than a one-off technical demonstration.

What Comes Next

With the trial successfully demonstrating 800GE capability across the full transcontinental distance, attention now turns to how quickly Optus moves toward commercial deployment of the technology for enterprise and wholesale customers. For WA businesses and data centre operators increasingly reliant on fast, resilient connections to the rest of the country and the world, the successful trial offers a promising signal that the state’s digital infrastructure backbone is keeping pace with its growing importance to the national data economy.

A Milestone for Australia’s Data Backbone

Telecommunications analysts have described the successful trial as a milestone for Australia’s national data infrastructure, given the technical difficulty of maintaining reliable 800GE transmission across such an extreme distance while preserving genuine dual-path redundancy. Few countries face the same combination of vast internal distances and concentrated population centres that Australia’s east-west corridor represents, making the achievement particularly significant within the broader Asia-Pacific telecommunications context.

Enterprise customers with operations spanning both coasts, including major banks, resources companies and government agencies, are expected to be among the earliest beneficiaries of any eventual commercial rollout, given their existing reliance on fast, dependable connectivity between eastern and western Australian offices and data facilities.

For now, the trial stands as a proof of concept rather than a finished commercial product, with Optus expected to detail commercial availability timelines separately as it moves from testing toward broader deployment of the 800GE technology across its network.

WA-based businesses relying on cloud services hosted interstate, an increasingly common arrangement even for companies with a strong local presence, stand to benefit from the additional capacity and resilience the upgrade promises once fully commercialised.

The successful trial also reinforces Perth’s growing profile as a genuine node in Australia’s digital infrastructure map, rather than simply an endpoint dependent on connectivity decisions made primarily with the east coast in mind.