Finland’s tech giant Nokia was selected by Thailand’s telecommunications giant Symphony Communication to upgrade the Malaysia-Cambodia-Thailand subsea cable system, replacing legacy equipment with Nokia’s Submarine Line Terminal Equipment.

In a statement on Wednesday, Nokia said the new equipment is powered by its sixth-generation Photonic Service Engines coherent optics. Once completed, the upgrade will enable up to 30 Tbps of capacity per fibre pair, three times that of legacy systems, and deliver low-latency connectivity between Thailand, Malaysia, and Singapore to support AI inference, cloud bursting, and mission-critical enterprise applications.

Nokia said the PSE-6 solution uses 5nm DSP technology and intelligent signal optimization to reduce network power consumption by 60 percent, supported by its WaveSuite optical network automation platform.

The MCT cable is the only subsea system landing in Rayong, in Thailand’s Eastern Economic Corridor, the country’s primary hub for AI-driven data center investment. According to Thailand’s Board of Investment, the country has attracted more than $23 billion in data center investment across 36 projects.

Ajay Sharma, Country Manager of Thailand at Nokia, said the upgrade expands the company’s longstanding partnership with Symphony from terrestrial and cross-border networks into the subsea domain. It will support Thailand’s ambition to become a regional hub for AI and cloud-driven digital services, the executive added.

Alex Loh, CEO of Symphony Communication, said the upgrade can help the company deliver unmatched capacity and reliability and become the connectivity partner of choice for hyperscalers and enterprises building next-generation digital infrastructure in Southeast Asia.

Thailand approves $29B investment wave as data center demand surges