Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here -- Ignore unavailable to you. Want to Upgrade?

To: MikeM54321 who wrote (9937)	12/26/2000 12:38:01 PM
From: Frank A. Coluccio	Respond to of 12823

Hi Mike, "Didn't you mean 10,000 feet(or traditional 'last mile') above? Or can you really run Ethernet protocol starting at an optical node(cableco) to the home? Or for that matter, from a space constrained NGDLC(telco) to the home?" Actually both. The longer subscriber sections through fiber creep are being shortened by placing field nodes closer to targets, so I assumed that the remaining section to be shorter. I used 1000 feet as an example. Ethernet can be run over twisted pair at 1000 ft, albeit at a lower speed than the standard 10 Mb/s. At 1000 feet multimode fiber will suffice for 10, 100 Mb/s. Enhanced MMF will even support GbE. Longer loops, up to the 10,000 ft range that you alluded to, will require singlemode fiber (SMF). However, the electronics for the latter are expensive. SMF, on the other hand, is used to feed the field nodes from the central office or head end at 1- and now 10- Gb/s, and the filed node distances of up to several thousand feet can be supported by MMF. I strongly believe that the backbone capabilities to the field nodes will rise to 40 Gb/s in about two years. Coaxial cable will also suffice for GbE, using standard Cable TV drop distances, with some modifications to physical layer interfacing, as we've discussed in the past. Of course, this also implies that going the other way (back to the head end) there would be a commensurate amount of re-engineering done. But this is not very likely to happen, as one might conclude on their own, for obvious reasons. FAC