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To: Curtis E. Bemis who wrote (3347)	9/19/1998 12:41:00 PM
From: Frank A. Coluccio	Read Replies (1) \| Respond to of 12623

Thanks Curtis, for spelling it out. Your comments effectively validate, with greater detail, my previous reference to "qualified" strands. Re: >> The newer carriers who are currently building (LVLT, Williams and others) are installing NZ-DSF, an absolute necessity.<< I recall LVLT announcing several months ago that they would become the first interstate to be using large effective area fiber, or LEAF. >>but suffice it to say, the factors like Amplified Spontaneous Emission (ASE), Polarization Dispersion and myriads of others, limit the effective use of a fiber at higher rates (OC-192), and at tighter wavelength spacings.<< We might as well give it closure, and include the water molecules that prevent windows above 1600 nm from being used effectively over distances, although LU now claims to have found a means in their labs to mitigate that problem significantly. We'll see. Regards, Frank Coluccio ps - we miss your input over in the VoIP section. Come by and honor us from time to time, will you? Nothing of major interest brewing over there now, aside from Jeff Pulver's conference releases, but I'll be putting up some discussion on the many [and potentially <cough!> conflicting] SS7/IETF/IPDC/TIPHON/OSP/SIP/SGCP, etc., and the proposed harmonization approaches, soon. Hope to see you there. FAC

To: Curtis E. Bemis who wrote (3347)	9/19/1998 1:13:00 PM
From: Frank A. Coluccio	Respond to of 12623

Curt, The other point I wanted to mention, since we're getting into it. Thus far, multiples of bandwidth, or the multiplication effects of DWDM, has been the distinguishing capability (along with some network management compliance issues, to a lesser extent, and administrative ease), that has marked these players' rankings. Sheer cooky-cutting of bandwidth will reach a point, however, where tunable capabilities will become more pertinent, and there will be a need for them to demonstrate some other means of gaining advantage. With add-drop capabilities now increasingly coming into play, and real routing using wavelength labels right on its heels, these more organic forms of networking at ultra high carrying levels will begin to be just as important, or more so, as the incremental bandwidth gains. In other words, IMO, the ability to architecturally, and in many cases dynamically, administer lambda [and their sub-payload] allocations through routing techniques will overshadow the issues surrounding density. For a while, anyway. JMO, Frank C.