Tokyo- 2006/12/12

KDDI is pleased to announce that it has concluded a construction and maintenance agreement (C&MA) regarding the Russia-Japan Cable Network (RJCN) with Rostelecom, Russia's largest long-distance telecom carrier. Under the agreement, the two companies will jointly construct this fiber optic submarine cable.

The RJCN is the first large capacity (640 Gbps) fiber optic submarine cable network to link Japan and Russia. It is scheduled to start operation in the fourth quarter of fiscal 2007 (Jan-Mar 2008). The RJCN network will consist of two north/south routes, each with a cable length of about 900 km. It will be a highly reliable cable system with a self-healing capability, enabling instant recovery even if a problem occurs with one of the cables.

In 1995, KDDI constructed the R-J-K (Russia-Japan-Korea) Cable, which is currently the only direct transmission route between Japan and Russia, with Rostelecom and other international carriers. In this way, KDDI has met various needs for communication with Russia. However, in recent years, there has been rapid growth in demand for not just Japan-Russia communication, but also Japan-Europe broadband Communication with minimal transmission delay. Accordingly, KDDI and Rostelecom have agreed to construct a broadband fiber optic submarine cable between Japan and Russia.

Completion of the RJCN will enable transmission capacity between Japan and Russia to be increased about 1000-fold compared to current routes. Additionally, based on the firm relationship that KDDI has built up with Rostelecom over many years, the two companies will link Japan and Europe via the shortest possible route by seamlessly connecting the RJCN and the Transit Europe Asia (TEA), a trans-Russia DWDM network owned by Rostelecom. With transmission delay less than 200 ms, this is an optimal route for forms of communication that have strict requirements regarding transmission delay, such as tailing and other real-time interactive communications, IPv6 applications, and broadband content transmission.

Regarding Japan-Europe connection, although various routes are available, including via Russia, the Pacific Ocean/the Atlantic Ocean, and the Indian Ocean, KDDI will provide services with even higher levels of quality and reliability than before by enabling broadband transmission on the route via Russia, which has the shortest delay.