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Technology Stocks : Nortel Networks (NT) -- Ignore unavailable to you. Want to Upgrade?

To: Dan Breslau who wrote (6714)	9/6/2000 1:24:20 PM
From: aladin	Read Replies (1) \| Respond to of 14638

Hi, For an update on the QOS issues, please see: qbone.internet2.edu The testing is done on the Internet2 network called Abilene. Abilene is documented at: internet2.edu The operations are done at IU and the network is accessable at: abilene.iu.edu This network rides on Qwest provisioned fiber and is a combined effort with Qwest, Cisco and Nortel all contributing. This 'concept' that Telecomguy has that Nortel is 'core' and cisco is 'edge' is kind of wierd and has little application on these newer networks. Nortel provides the Sonet geer, cisco provides the routers (which we call core routers). Clearly both are necessary. Before we get too proud and both claim that Internet2 rides on Cisco/Nortel gear and create some new ad campaign, the fiber is from Lucent :-) John

To: Dan Breslau who wrote (6714)	9/6/2000 1:49:57 PM
From: Bill	Respond to of 14638

One could switch the core technology from ATM to SONET to Ethernet to lambdas without much difference to the application -- as long as the QoS guarantees are met. No doubt the optimum application signaling method will be through IP, but each of the above technologies has different interworking properties, most of which are not standardized. QoS guarantees will only be met within a single layer's technology, and indeed sometimes only within a single vendor's product. Clearly that is why most network implementations utilize a single vendor's product at each layer, e.g. Nortel (at L1), LU (at L2) and CSCO (at L3). The only way ubiquitous Internet based IP services can be offered is if IP QoS is perfected, standardized and adopted broadly, thereby eliminating the need for application specific ATM QoS or TDM "QoS".