http://www.webarchive.ja.net/services/publications/archive/newsletters/network-news/issue28/news28.txt http://en.wikipedia.org/wiki/Synchronous_Digital_Hierarchy http://en.wikipedia.org/wiki/CLNP
http://www.webarchive.ja.net/services/publications/archive/newsletters/network-news/issue28/news28.txt http://en.wikipedia.org/wiki/Synchronous_Digital_Hierarchy http://en.wikipedia.org/wiki/CLNP
European-Research-Internet-History.docx