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Technology Stocks : Newbridge Networks -- Ignore unavailable to you. Want to Upgrade?

To: Luc N. who wrote (9610)	2/12/1999 11:05:00 PM
From: Doug	Respond to of 18016

Luc: ATM (Asychro Transfer Protocol) is a high speed cell switching protocol. It uses a fixed 53 byte cell length; (5 bytes 48 bytes data) and a cell relay method. The ATM network consists of a set of ATM cell switches that are connected in a point to point fashion thru ATM interfaces. The interfaces could be either user Network (ATM Routers & hosts) or Network nodes (ATM Switches only).ATM offers QoS guarantees which means users can accord a level of priority. The protocol is used extensively in Fibre Networks. It is a Networklayer protocol& is used at high speeds. The dominating protcol on the Internet is TCP/IP a data link layer protocol . This protocol is in common use by both Last mile users and general Enterprise LAN users. It is used extensively but has its limitations in terms of QoS, Speed etc. Since we have 2 different protocols and speeds viz IP and Fibre, we need some means at the Edges of the LAN to get the IP to conform to the ATM. This repackaging,buffering,muxing and demuxing & labelling has to be done at both ends of a LAN network connected to a ATM fibre. These Edge routers are the links between the 2 Networks & are in great demand now by NSP providers. I did not discuss Wireless since the same principles apply. I trust this lay explanation will assist.