Practically speaking, it's a 1-Gbps cable modem. "This is something no cable modem can do today," Bernstein said. It's more than 25 times the throughput available with DOCSIS 2.0 cable modems.
Bernstein's presentation was titled "A Proposal for DOCSIS 4.0" -- a cable engineer's joke, because a fourth major iteration of the cable modem spec doesn't exist today.
His point was to suggest what's next, after the advent of DOCSIS 3.0, which kicks up the potential throughput speeds by providing channel-bonding to combine multiple 6-megahertz channels in existing RF networks.
But while the industry is using the 3.0 spec to target downloads of between 100 and 160 Mbps, Cisco envisions much higher speeds -- as much as 10 Gbps in the future, according to Bernstein -- using a passive optical network (or "PON") as the underlying transport mechanism.
Ссылка: http://www.multichannel.com/article/81868-...Cable_Modem.php
Сообщение отредактировал Streamer: 08 сентября 2009 - 14:44