NTT Communications has expanded the data-transmission capacity of its Global IP Network between Asia and Oceania to 500 Gbps. Capacity has increased nearly tenfold in five years, from 53 Gbps in 2007.
NTT Com's largest cable network offers 630 Gbps between Japan and the United States. It uses a dual-stack (IPv4 and IPv6) configuration as one of NTT Com's core IPv6 networks.
NTT Com has implemented a number of initiatives to boost its network, including launching the Asia Submarine-cable Express, a low-latency, highly reliable undersea cable connecting major cities in Asia, and offering strengthened security to prevent DDoS attacks.
http://www.ntt.co.jp