NTT Communications Deploys 100Gbps Digital Coherent Technology on Transpacific Submarine Cable

NTT Communications Deploys 100Gbps Digital Coherent Technology on Transpacific
                               Submarine Cable

- PC-1 Cable System's Capacity Increased More than 2.5 Times to 8.4 Tbps -

PR Newswire

TOKYO, July 17, 2013

TOKYO, July 17, 2013 /PRNewswire/ -- NTT Communications Corporation (NTT Com)
announced on July 17 the world's first deployment of 100 Gbps digital coherent
technology on a transpacific submarine cable system linking the U.S. and
Japan, increasing the design capacity of the company's PC-1 system by more
than 2.5 times to 8.4 terabits per second, effective immediately.

Data traffic has been growing rapidly due to the increased use of smartphones
and tablets, music/video downloading, cloud computing and services such as
social networking. In response, NTT Com demonstrated 100 Gbps optical
transmission using digital coherent technology on the company's U.S.-Japan
route in October 2011. But despite the technology's attractiveness as a method
for rapidly expanding optical network capacity, it initially was difficult to
provide stable 100 Gbps communication over long distances due to the
characteristics of light. By optically optimizing the PC-1's network
architecture, including with strategically placed optical repeaters and an
enhanced optical fiber layout, NTT Com has now achieved the world's first
commercial deployment of 100 Gbps digital coherent technology on a
transpacific route.

By the end of 2014, 100 Gbps optical transmission technology also will be
deployed in NTT Com's Asia Submarine-cable Express (ASE), which links major
cities in Asia via the shortest possible route for industry leading low
latency.

- PC-1 cable system

The PC-1 optical submarine cable, the shortest transpacific link, is operated
by PC Landing Corp., an NTT Com group company.

Total length:     21,000 km
Configuration:    Ring-topology network with landing stations in Japan and the
                  United States
                  Ajigaura (Ibaraki Prefecture, near Tokyo); Shima (Mie
Landingstations: Prefecture, near Osaka and Nagoya); Harbour Pointe,
                  Washington; and Grover Beach, California

- Digital Coherent

Digital coherent is the latest transmission technology that improves spectral
efficiency through multi-level modulation, such as phase modulation and
polarization multiplexing. It greatly enhances receiver sensitivity by
combining coherent detection and digital signal processing.

About NTT Communications Corporation:

NTT Communications provides consultancy, architecture, security and cloud
services to optimize the information and communications technology (ICT)
environments of enterprises. These offerings are backed by the company's
worldwide infrastructure, including leading global tier-1 IP network, Arcstar
Universal One (TM) VPN network reaching 160 countries/regions, and over 140
secure data centers. NTT Communications' solutions leverage the global
resources of NTT Group companies including Dimension Data, NTT DOCOMO and NTT
DATA.

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SOURCE NTT Communications Corporation

Website: http://www.ntt.com/index-e.html
Website: http://www.twitter.com/nttcom
Website: http://www.facebook.com/nttcomtv
Website: http://www.linkedin.com/company/ntt-communications
Contact: (Mr.) Koji Kimura / (Ms.) Yuko Takada, Service Infrastructure, NTT
Communications Corporation, +81-3-6700-7549, global-nw-pr@ntt.com
 
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