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NTT Communications' data centers, integrated with our communications network, are available in major Japanese cities and overseas locations. We not only provide building reliability and security, but also provide advanced operating services integrated with the network.

Digital Leased Circuit (High Speed Digital) is a digital leased line service providing an optimal communication environment for enterprise backbone lines, and boasts high-quality digital transmission paths and advanced maintenance and monitoring systems.

Digital Reach is a high-quality digital leased line service with excellent cost performance able to connect offices in several different prefectures at low cost.

Disaster Recovery (Network) is a storage network service optimized for disaster measures and system migration.

Disaster Recovery (System & Storage) is a solution for dealing with disasters and ensuring business continuity by protecting enterprises' important systems and data in the event of a disaster.

DNS Service is a DNS service in which a DNS server is operated on the OCN side for the customer as an option for OCN enterprise Internet access services. We offer a DNS Outsourcing Plan that provides a primary DNS server and a secondary DNS server on the OCN side, in addition to a Secondary DNS Plan that only provides a secondary DNS server.

The Dual Active VPN service consists of Arcstar IP-VPN and Group-VPN, differentiating the use of VPNs according to the importance of traffics, such as using Arcstar IP-VPN for important traffics and Group-VPN for non prioritized high-volume communication traffics. In the event there is an outage in Arcstar IP-VPN, Group VPN will be utlilized as backup lines.The solution includes a set containing VPN ports, access lines and customer premises equipments, provided as one-stop service.