Press Release
June 25, 2008

New Bandwidth Controls to Help Ensure OCN Network Quality

TOKYO, JAPAN –– OCN, the Internet service provider operated by NTT Communications (NTT Com), will begin restricting network access by individual customers who upload more than 30 gigabytes of data per day, a new limit that will be introduced on August 1 to help ensure stable, trouble-free access to the Internet for all customers.

Although OCN has continued to expand its network bandwidth to accommodate increasing data traffic, a small number of individual users have been monopolizing substantial network resources by uploading massive amounts of data, which can slow the speed of the network and lower communication quality for other users.

OCN will begin notifying any individual that exceeds the 30 GB daily limit. The user will be asked to observe the limit, but if they do not, OCN will suspend their access to the network and possibly terminate their service contract.

Downlink traffic, such as browsing, receiving e-mails and data downloading, will not be subject to the 30GB limitation.

About NTT Communications Corporation
NTT Com delivers high-quality voice, data and IP services to customers around the world. The company is renowned for its diverse information and communication services, expertise in managed networks, hosting and IP networking services, and industry leadership in IPv6 transit technology. The company’s extensive global infrastructure includes Arcstar™ private networks and a Tier 1 IP backbone (connected with major ISPs worldwide), both reaching more than 150 countries, as well as secure data centers in Asia, North America and Europe. NTT Com is the wholly owned subsidiary of Nippon Telegraph and Telephone Corporation, one of the world's largest telecoms with listings on the Tokyo, London and New York stock exchanges. Please visit