Ipsilon Networks

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Ipsilon Networks was a computer networking company which specialised in IP switching during the 1990s.

The first product called the IP Switch ATM 1600 was announced in March 1996 for US$46,000.[1] Its switch used Asynchronous Transfer Mode (ATM) hardware combined with Internet Protocol routing.[2] The company had a role in the development of the Multiprotocol Label Switching (MPLS) network protocol.[3] The company published early proposals[4] related to label switching,[5] but did not manage to achieve the market share hoped for and was purchased for $120 million by Nokia in December 1997.[6] The president at the time was Brian NeSmith, and it was located in Sunnyvale, California.[6]


  1. ^ Jim Duffy (March 4, 1996). "Start-up takes new IP route". Network World. Retrieved July 4, 2011. 
  2. ^ "The phenomenon of Ipsilon". Technology Inside. February 8, 2007. Retrieved July 4, 2011. 
  3. ^ Peter J. Welcher (August 1, 1997). "Cisco Tag Switching". Chesapeake NetCraftsmen web site. Retrieved July 4, 2011. 
  4. ^ P. Newman; et al. (May 1996). "Ipsilon Flow Management Protocol Specification for IPv4". RFC 1953. IETF. Retrieved October 8, 2013. 
  5. ^ (known by Cisco Systems as tag switching at the time)
  6. ^ a b Jim Duffy (December 9, 1997). "Nokia catches a falling Ipsilon". Network World. Archived from the original on April 20, 2012. Retrieved July 4, 2011. 

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