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Technology Stocks : Ascend Communications (ASND)
ASND 204.41-1.0%Nov 14 9:30 AM EST
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To: djane who wrote (53809)9/7/1998 7:30:00 PM
From: djane  Read Replies (1) of 61433
 
Japan Telecom to Construct Nationwide 80Gbps Network

nikkeibp.asiabiztech.com

September 8,
1998 (TOKYO)
-- Japan Telecom
Co., Ltd. said it
started to increase
the capacity of its
nationwide
optical-fiber
backbone
networks by
introducing
wavelength
division
multiplexing
(WDM), to
enable it to
upgrade the
network to
80Gbps.
Japan Telecom's
largest backbone
network is the
Tokyo-Osaka
route, with a
capacity of
2Gbps-4Gbps.

WDM technology
permits increases
in line capacity
without laying
new optical-fiber
cables. The
larger-capacity
network will meet
the demand for
high-speed
communication
services such as
leased
asynchronous
transfer mode
(ATM) services
with a
transmission
speed of
150Mbps.

Japan Telecom
has partially
introduced the
WDM technology
in the backbone
network between
Tokyo and Osaka
via Nagoya. The
telecom carrier
will apply it to the
routes between
Sapporo and
Sendai, and
between
Hiroshima and
Kyushu within
fiscal 1998.

Japan Telecom
plans to complete
its migration to
WDM nationwide
optical-fiber
networks by the
end of fiscal
1999.

KDD Co., Ltd.
also is setting up a
backbone
network utilizing
WDM
technology. It is
called Japan
Information
Highway (JIH),
an optical-fiber
submarine cable
loop around the
Japanese
archipelago slated
to start in March
1999. The total
line capacity of
JIH is 100Gbps,
which is roughly
equivalent to
Japan Telecom's
new backbone
network.

Such efforts by
major carriers to
increase the
capacity of
backbone
networks will help
cut telecom costs
at repeater
sections, which
will lead to lower
telecom service
fees.

(Nikkei
Communications)

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