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To: Marshall who wrote (1258)	1/22/1998 1:13:00 PM
From: ahhaha	Respond to of 29970

I've been aware of the developments in WDM. This gives more meat to my recent comments on this thread. I've excerpted some comments from Sprint's CTO Marty Kaplan. He, like me, is bullish on SONET, ATM, WDM, and fiber solutions: "There is no question in my mind that ATM will be the integrating fabric for all services," he asserts. "We need the quality that ATM offers and we need its ability to interoperate on an end-to-end basis. I believe that not only will ATM at the core be meaningful, but that it will reach all subscribers' premises, eventually." "Until now, the industry's main role has been to connect specific protocol subscribers anywhere in the network," he continues. "Now, I must allow them to have video collaboration, content hosting, local caching and a dozen other things. In essence, I equip them with the capability to use any media distribution at any bandwidth they need." Extending capacity with WDM The latest technology at Sprint is wavelength division multiplexing (WDM), which is like a laser pointer, projecting many different lights down a singlemode fiber, each one carrying gigabits of information. At the other end, these lights are brought back together. In 1999, Sprint's WDM implementation will extend its network's capacity 40 times and, by the end of the decade, by as much as 100 times. WDM illustrates the relationship between technologies right out of the lab and those that integrate network services and user requirements. "[WDM] allows me almost unlimited scalability, while maintaining network survivability and service consistency," Kaplan says. "I put in channels as I need them, and I don't have to put in the maximum-I can add 16, 32 or whatever. Because WDM enables great scalability on the transport layer, it allows the carriers to avoid their biggest expense, which is the physical fibers."