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Nikkei Network

August 2007

FEATURE 1

 

Introducing Various Systems with Photos

The Illustrated Wireless Communications

 

The world is full of different kinds of wireless communications. Wireless communications are active even in areas that are normally out of sight. They support the activities of many corporations and government organizations, and help make individual people’s lives richer. This feature introduces every aspect of wireless communications, from the daily usage we are all familiar with to the aspects that are less visible.

 

Part 1 - VLF (very low frequency), LF (low frequency), MF (medium frequency):

Standard frequency and time signal service, radio broadcasting, GMDSS, Loran-C, submarine communications

 

Part 2 - HF (high frequency), VHF (very high frequency):

Amateur radio, noncontact IC cards, international VHF phones, television broadcasting, simple radio, police radio, air traffic communications, etc.

 

Part 3 - UHF (ultra high frequency):

Taxi communications, RFID tags in the UHF band, specified low power radio, mobile phones, GPS, PHS, mobile WiMAX, etc.

 

Part 4 - SHF (super high frequency), EHF (extra high frequency):

FWA, microwave fixed communications, UWB, satellite broadcasting, satellite communications, DSRC, WirelessHD

 

Beginners’ Question

 

When providers connect to one another, who pays?

 

FEATURE 2

 

4 Points to Understand

Product Study: Corporate-Use Broadband Routers

 

The penetration of broadband routers to homes has accelerated with ADSL and FTTH services. It isn’t only individuals and households who are using broadband routers to connect to cheaper broadband services. In what ways do the broadband routers that are used by corporations for broadband services differ from products for home-use? Let’s check the points that will reinforce corporate use.

 

Introduction:

Putting in order the points relevant to “corporate use”

 

Point 1 - Internet VPN:

Building a safe tunnel with IPsec

 

Point 2 - Security

Avoiding fraudulent use with terminal authentication

 

Point 3 - Reliability

Being prepared for trouble with equipment and lines

 

Point 4 - Quality of communications

Maintaining the quality of internal IP phones

 

Bonus article: VPN encryption and decryption is a heavy burden for the router

 

FEATURE 3

 

Learning Network Infrastructure in Charts

 

RSS

A format for summarizing web pages, used increasingly for searches and with music programs

 

Nikkei Network

August 2007

FEATURE 1

 

Introducing Various Systems with Photos

The Illustrated Wireless Communications

 

The world is full of different kinds of wireless communications. Wireless communications are active even in areas that are normally out of sight. They support the activities of many corporations and government organizations, and help make individual people’s lives richer. This feature introduces every aspect of wireless communications, from the daily usage we are all familiar with to the aspects that are less visible.

 

Part 1 - VLF (very low frequency), LF (low frequency), MF (medium frequency):

Standard frequency and time signal service, radio broadcasting, GMDSS, Loran-C, submarine communications

 

Part 2 - HF (high frequency), VHF (very high frequency):

Amateur radio, noncontact IC cards, international VHF phones, television broadcasting, simple radio, police radio, air traffic communications, etc.

 

Part 3 - UHF (ultra high frequency):

Taxi communications, RFID tags in the UHF band, specified low power radio, mobile phones, GPS, PHS, mobile WiMAX, etc.

 

Part 4 - SHF (super high frequency), EHF (extra high frequency):

FWA, microwave fixed communications, UWB, satellite broadcasting, satellite communications, DSRC, WirelessHD

 

Beginners’ Question

 

When providers connect to one another, who pays?

 

FEATURE 2

 

4 Points to Understand

Product Study: Corporate-Use Broadband Routers

 

The penetration of broadband routers to homes has accelerated with ADSL and FTTH services. It isn’t only individuals and households who are using broadband routers to connect to cheaper broadband services. In what ways do the broadband routers that are used by corporations for broadband services differ from products for home-use? Let’s check the points that will reinforce corporate use.

 

Introduction:

Putting in order the points relevant to “corporate use”

 

Point 1 - Internet VPN:

Building a safe tunnel with IPsec

 

Point 2 - Security

Avoiding fraudulent use with terminal authentication

 

Point 3 - Reliability

Being prepared for trouble with equipment and lines

 

Point 4 - Quality of communications

Maintaining the quality of internal IP phones

 

Bonus article: VPN encryption and decryption is a heavy burden for the router

 

FEATURE 3

 

Learning Network Infrastructure in Charts

 

RSS

A format for summarizing web pages, used increasingly for searches and with music programs