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skuv

@rr.com
reply to buzz_4_20

Re: It's coming

said by buzz_4_20:

Upload is limited by the tech, but not as much as the end user gets.

The tech (DOCSIS 3.0) limits upload to a bit over 50% of the download speed (per channel).

TW is no where close to that ratio on upload.

A QAM channel, which is what a downstream channel is, is about 38mbit.

Upstream channels are ~10mbit.

DOCSIS 3.0 bonds 8 downstreams and 8 upstreams. That is about ~310mbit down max and ~80mbit up max. A little more than 25%, not close to 50%.

No, the end user doesn't get 25% either, but they won't be getting 50% unless their downstream is limited while their upstream is raised.


TelecomEng

@rr.com
said by skuv :

A QAM channel, which is what a downstream channel is, is about 38mbit.

Upstream channels are ~10mbit.

DOCSIS upstreams are 10Mbps only if you use the DOCSIS 1.x upstream modulation profiles. DOCSIS 2 upstream profiles enable ~30Mbps on a 6.4Mhz wide, 64QAM upstream.

»www.cisco.com/en/US/tech/tk86/tk···27.shtml