NTT Com deploys 400Gbps optical transmission system

Staff writer
Telco SDN/NFV Asia

NTT Communications  will begin deploying an ultra-large-capacity, space-saving and energy-saving 400Gbps (400G) optical transmission system in data centers for network connection. Deployment will be implemented sequentially from April 14.

The company said the system will raise the transmission capacity of NTT Com's core network above 19Tbps per optical fiber, or more than double existing capacity.

The system utilizes the advanced digital-signal processing technology which is the result from NTT's R&D.

The new system reduces energy consumption per bps by 75% and space requirements by 80% compared to the existing system. The savings were achieved through a synergistic combination of advanced digital-signal processing technology and 16nm complementary metal-oxide semiconductor (CMOS) technology.

Energy-saving integrated circuits can be constructed rapidly, enabling transmitters to be quickly deployed even in confined spaces at data centers.

According to the company, the new system achieves more than double the transmission capacity per optical fiber compared to its predecessor system. To generate 400G signals, the system utilizes NTT's research result: 16 quadrature amplitude modulation for both phase and amplitude, and sub-carrier multiple transmissions.

To deliver new services and functions with even greater speed and flexibility, NTT Com will combine SDN technologies and dis-aggregation architecture, which can be redeployed as required according to function or module, replacing existing high-function, all-in-one dedicated equipment.

Going forward, NTT Com and parent NTT will jointly investigate further possibilities, including the deployment of PoC to deliver high-speed Ethernet signals, including 400GbE. Mindful of IEEE standardization trends, they will pursue increased flexibility and agility for transmission networks by leveraging dis-aggregated equipment and SDN technologies.

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