NTT Com First in Japan to Install 40Gbps Dense Wavelength Division Multiplexing Systems
NTT Com in January for the first time in Japan installed 40Gbps Dense Wavelength Division Multiplexing (DWDM) Data Transmission Systems in its Tokyo, Nagoya and Osaka commercial facilities, following the installation of 2.4Gbps and 10Gbps systems in 2002 and 2004, respectively.
40Gbps DWDM, developed for the first time in the world by the NTT Network Service System Institute, carries 40G data transmission at different wavelengths over Dispersion Shifted Fiber. The technology meets the strong demand for high data volume transmission over NTT Com’s backbone, which has already exceeded the one-terabit level. The data traffic is expected to increase dramatically along with the trend to use of optical fiber access networks and larger distributed content volume.
Through use of the new technology, 500,000 telephone lines and 20 HDTV un-compressed video signals can be transmitted simultaneously via a single wavelength.
