http://www.nuritelecom.co.jp/NetADM/NetADM.html
http://www.zdnet.co.jp/enterprise/0203/25/02032521.html
http://linux.ascii24.com/linux/news/today/2002/03/27/634701-000.html
http://www.zdnet.co.jp/enterprise/0212/20/epn05.html