To: Mighty Mizzou who wrote (13205 ) 2/3/2000 1:03:00 PM From: Techplayer Respond to of 21876
Mighty, For now, but look at the growth of NT versus LU in that area. Check this out regarding the 400G... "While the absolute level of these bandwidth projections and the growth rates needed to get there may seem extreme, note that the applications that demand resources from telecom networks are also undergoing drastic change. Most importantly, the composition of traffic flows connected through the backbone is shifting. While communication networks have traditionally provided asymmetric paths between local users and remote computers, we believe network demand in the future will be increasingly machine-to-machine traffic, such as a handheld computer requesting an automatic download of flight times from an airline?s server. Mike O?Dell of UUNET has referred to this machine-to-machine traffic as the onslaught of ?silicon cockroaches.? Nonetheless, we view the transition to this new traffic pattern is very important to bandwidth growth, since a human at any one instance can only absorb so much data and can only use the Internet for so many hours a day, whereas these constraints obviously do not apply to computers. We believe new network applications in development will also add fuel to the fire. Level 3?s (LVLT $77-3/4) engineering group recently completed a study on the effects of running a ?tele-presence? application on its network where each node would have full-motion, 360-degree, high-definition video and high-fidelity audio. The study found that a single application of this service running uncompressed would require 14 Tbps of bandwidth. Considering that with Lucent's (LU $82-9/32) new AllWave fiber, there is a transmission window of 1,250 nanometer to 1,650 nanometer or a total of 400 nanometer, which, if you take out a room for wavelength division multiplexing (WDM) channel spacing, leaves 100 nanometer or 12.5 Thz. Furthermore, considering that it will be possible to do multilevel optical modulation per bit over the 12.5Thz, one effectively can transmit at 50 Tbps. Unfortunately, given that currently, distance is traded off for bandwidth in optical transmission and that an average optical span is 400 kilometer; network engineers believe a more realistic theoretical maximum is 20 Tbps transmitted over a 400 kilometer fiber pair. Thus, one instance of a tele-presence application would absorb 70% of theoretical network bandwidth. " We need next gen and we need it now.... Brian