Nokia to triple subsea capacity for Symphony on key Southeast Asia route

This infrastructure upgrade directly addresses the capacity bottleneck for streaming and AI services in Southeast Asia by tripling the bandwidth of a primary regional corridor. For OTT players, the improved latency and reliability between Thailand, Malaysia, and Singapore ensure more consistent delivery of high-bitrate video and real-time AI processing at the edge. As Thailand attracts significant hyperscale investment, the MCT cable secures a sovereign, high-efficiency route that reduces reliance on legacy terrestrial links. Watch for whether Symphony secures new long-term capacity leases from major U.S. cloud providers or regional streaming platforms following the 30 Tbps activation.

Additional context.

The upgrade of the Malaysia-Cambodia-Thailand (MCT) cable arrives as Thailand undergoes a massive surge in digital infrastructure investment. According to the Bangkok Post (June 2026) and data from Thailand’s Board of Investment (BOI), digital sector applications reached 874 billion baht in the first quarter of 2026 alone, marking an 823% increase year-on-year. This influx includes projects from major entities like TikTok System and hyperscale operators such as Global Switch and Evolution Data Center. The surge is partly driven by spillover demand from Singapore, where land and power constraints have pushed operators to seek capacity in neighboring markets.

Southeast Asia is rapidly becoming a focal point for subsea cable renewal to support growing AI workloads. Per The Tech Capital (November 2025), a new investment cycle is seeing hyperscalers like Meta and Google move from buying third-party capacity to leading the design of routes like the 20,000-km Bifrost and the 24-fiber pair Candle system. These projects aim to minimize latency between key hubs like Japan, Singapore, and Australia. Nokia’s PSE-6 technology facilitates this transition by allowing operators to upgrade existing fiber without the operational complexity of deploying entirely new subsea chassis, as demonstrated in earlier field trials with GlobalConnect (February 2023).

Furthermore, regional governments are formalizing the framework for this digital growth. Per The Star (June 2026), ASEAN member states are preparing to sign the Digital Economy Framework Agreement (DEFA) in late 2026 to establish common rules for cross-border data flows. This regulatory alignment, combined with the expected tripling of data center capacity in the region by 2030, makes high-capacity subsea conduits like the MCT system essential for the long-term scalability of the digital economy in Southeast Asia.