?– The year 2006 was generally seen as a year of testing, trials, and initial rollouts,
with AT&T and Asia (especially Korea and Japan) leading the way; widespread
adoption and ADSL displacement will begin in 2007.
?– In 2004, 5 percent of total DSL ports shipped were VDSL or G.SHDSL used for
Ethernet, increasing to 10 percent in 2005, 11 percent in 2006, and 46 percent in
2009 (from Infonetics??™s DSL Aggregation Hardware, a quarterly worldwide market
share and forecast report, published in the second-quarter of 2007).
TABLE 3.2 Technologies Used for Ethernet Services
Ethernet Technology Metro Applications
Ethernet switches and routers Ethernet switches and routers are the basic tools of metro
Ethernet networks, used in POPs and COs and the primary
customer premises connection.
10/100M fi ber is currently deployed most frequently; the use
of 1G fi ber is increasing quickly and will close the gap over the
next several years, and the use of 10G fi ber is starting to rise as
prices reach a comfortable buying level.
Ethernet over SONET/SDH (standard
and RPR, including prestandard RPR)
Many carriers offer their large customers high-end Ethernet
services that transit their very safe SONET/SDH networks.
Pages:
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327