To: MikeM54321 who wrote (8933 ) 10/18/2000 8:45:29 AM From: Frank A. Coluccio Respond to of 12823 Hi Mike, re: where is Gb Ethernet going in, and who is doing it? In large part, the dark fiber providers like MFNX and LVLT (yes, LVLT will provide dark in the right situations, as well as high speed native Ethernet as a managed service) and others have been the primary movers, enabling the implementation of DWDM-based ring architectures in metro areas. While these proprietary rings (with many of them Optera-based) can support a multitude of protocols, it appears to me that GbE bridge links between routers are being used to replace T3s and T1 (yes, Gb links at Layer 2 are replacing T1s as well as T3s because dramatic pricing deltas make it more attractive) in greater numbers than any other use. And this lead by GbE will only increase as voice in enterprise networks migrates to VoIP. But lately I am getting information that Verizon's pilots are about over, and they are doing ICB (individual case basis) deals with some large users. Some Gb links are being supported by MSOs and independent cable operators, and power companies are getting into the act, as well. In addition to Verizon, SBC is now also supporting GbE. I am currently awaiting information on two different flavors of GbE (p-p and switched) here in the NY Metro Area from now two different sources. I may go to a third source. GbE is growing rapidly both in availability and reach. It's not all the no-brainer that I may be making it sound like. Before one can easily obtain GbE they must often commit to a fiber build where one did not exist previously, which often means new construction work that must be paid for by the end user. Other means of obtaining GbE in the future will be through free space Laser systems (I-R). Carriers are usually loathe to do fiber builds for an individual user, unless there is sufficient visibility for additional business along a route, or within a building. Where there is not this potential for additional business, the individual subscriber often winds up paying for the entire build. And then, of course, there are always those cases where the client is large enough to hire a private fiber contractor and obtain their own rights of way. In these instances, the end user winds up putting in a private MAN, which actually approximates the ring networks that I spoke about above by the dark fiber carriers.