Service Providers want to deploy Carrier Ethernet both to satisfy customer demand
and to simplify their networks so they can carry fast growing data traffic while handling
TDM traffic. As one measure of the young but growing market, Infonetics estimated there
were over 350,000 Ethernet connections to buildings in North America at the end of 2005.
Ethernet is beginning to be the preferred technology for fiber extension from already connected
buildings to other nearby unconnected buildings; it began on a trial basis in 2003,
with growth in 2005 and 2006, and it will be a fairly prevalent method in 2007.
In the Infonetics major study of Service Providers around the world (cited previously,
Service Provider Plans for Metro Optical and Ethernet, North America, Europe, Asia
Pacific, 2006), 72 percent of Service Providers were using Ethernet collector rings for
customer access in 2006 and 84 percent were using them in 2007 somewhere in their
networks. This growing use of Ethernet collector rings to connect customer buildings
and to aggregate DSLAM and cable CMTS traffic is increasing the use of Ethernet to
the detriment of SONET/SDH. In a telling trend, the number of providers that use
Ethernet over WDM is increasing from 80 percent in 2006 to 92 percent after 2007,
while similarly the number of providers using Ethernet over SONET/SDH decreases
from 88 percent in 2006 to 60 percent after 2007.
Pages:
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322