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To: J Fieb who wrote (20632)	2/7/1999 6:21:00 PM
From: Douglas Nordgren	Read Replies (2) \| Respond to of 29386

Re FC National Backbone, why not? Distance limitations, remember, current max is 10k. But that is changing as we speak. Stay tuned. Douglas

To: J Fieb who wrote (20632)	2/7/1999 11:55:00 PM
From: George Dawson	Respond to of 29386

"...why don't they just designate a national backbone for FC over DWDM and forget the ATM, HIPPI, IP etc?" This will never happen. Here is a quick summary of the overall features in a comparison of ATM, FC, and GE: misspiggy.gsfc.nasa.gov In reality, it is much more complicated and ATM, SONET, and WDM have something that FC does not the backing of all the big voice and data carriers as well as a huge amount of hardware that is getting less expensive every day. The ATM hardware is a broad array of devices to take advantage of ATMs functionality. Like FC it can be both circuit and packet switched, has classes of service, is scalable, and can carry other protocols. From the NASA article, the key missing feature is still a high performance gateway device to get the data out to the big pipes. George D.