Huawei Marine presented a live demonstration of its ultra-long unrepeatered system and ZTE announced what it claims is a new record for long-haul 400 Gbit/s single-carrier optical transmission.

For the demonstration at OFC, Huawei Marine recreated its lab environment in Beijing. The company stated that by observing signal spectrum on the receiver side and signal power evolution across the link span, the system can deliver high reliability and transmission capabilities.