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Nikkei Communications

August 1, 2007

Cover Story 1

Exhaustive study on real power of IEEE802.11n at office and home

Appearance of products in compliance with IEEE802.11n draft 2.0 is about to usher in an age when we can use a wireless LAN system with a maximum of 300Mbit/sec without worrying about interconnectivity. This article measures throughput with the latest of these products and explains the real power of 802.11n and the latest technologies based on it.

General: Its throughput exceeds 100Mbit/sec

File transfer/HTTP download: 100M Ethernet beats 802.11n

Co-existence with 802.11a: 802.11n decreases by 30% and 802.11a substantially drops in throughput

Actual measurement - office: 802.11n keeps throughput up to 25m

Actual measurement - detached house: 802.11n marks about 80Mbit/sec in the remotest room

Actual measurement - condominium: Walls have little effect on throughput

Cover Story 2

Mistake-laden server room construction: Is your heat release measure really working?

Hot summer is coming again this year. This season brings an unavoidable problem for system administrators to the surface. It is a heat release measure for servers. In addition, they must take measures for contingencies such earthquakes, fires, and thunderstorms. This article guides you through building of a right server room.

Latest technology that has stimulated enterprises

WAN higher-speed equipment

Overcome delay with a combination of technologies to improve application response

WAN higher-speed equipment improves inter-site communication response. It overcomes delay within WAN with mechanisms of cache and speeding up communications of specific applications.

Highly technical term you need to know

SDP

Report

In review on iPhone, we test its innovative interface

NTT reopens its NGN showroom, where Sony and Iwatsu Electric also demonstrate their service and system

Wireless Japan 2007 clearly indicates competition for dominance in the next-generation wireless market

Actual measurement on PLC device products under Aterm brand reveals the route type falls behind the single type in performance

NTT DoCoMo also develops femtocell: Does it mean a strategic move towards future FMS?

Security watch

Log management for protecting yourself can be turned to a workable mechanism with a little ingenuity

Telecom watch

2.5GHz-band license policy allows NTT East and NTT West to enter the market of fixed regional band

Editor-in-Chief's Interview

"If Skype were just a charge-free telephone, it would get old quickly. We have to communicate the fascinating benefits only Skype could offer."

Mr. Shinichi Iwata, General Manager for Japan Office, Skype Technologies SA

Strategic network study

Tohoku Electric Power Co., Inc.

The company deploys approximately 2800 wireless LAN APs with thorough site survey to avoid interference

ING Life Insurance Company Ltd.

The company deploys Nokia E61 to synchronously receive and transmit mail through Exchange server