On May 19, at 7:55 AM, John Robinson wrote:
Another thought. A couple months ago Cisco announced their development of new routers that would allow unheard of speeds on existing infrastructure. They were saying you could download every book in the library of congress in seconds, every man woman and child in China could be on the internet at the same time and a bunch of other unbelievable numbers. Would this router not solve the problem you mention?
These new 300 TB routers from Cisco are meant for the Internet backbone, not local cable systems. Cable speeds are constrained by the bandwidths in the DOCSIS 3.0 specification. In the spec, the downstream maximum speed is given as about 43 Mb/s per channel. There is some loss from overhead, so you apparently can’t get much past 35 in the real world, which is why Insight is making noises about offering 30 Mb/s Internet. To up the speed even more, they can give more channels for more money.
By the way, when I was researching my new modem last summer, I found out that all DOCSIS 3.0 compliant modems must support at least four channels, so Insight can theoretically crank their download speed up to about 170 Mb/s. (I'm not holding my breath for that one.)
smime.p7s
Description: S/MIME cryptographic signature
_______________________________________________ MacGroup mailing list [email protected] http://www.math.louisville.edu/mailman/listinfo/macgroup
