Quote:
Originally Posted by Sephiroth
I can certainly answer the question as regards upload limitations. In simple terms (I can explain it in much greater depth), the upstream operates in a noisy-ish (susceptible to noise) part of the frequency spectrum. Accordingly the packing density of upstream data is lower than downstream so that the potholes created by noise can be corrected at the CMTS. The frequency range is prescribed by international bodies.
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There's also a lot less of it.
---------- Post added at 12:04 ---------- Previous post was at 12:02 ----------
Quote:
Originally Posted by thenry
The sort of quality on openreach fibre. would DOCSIS 3.1, on a new spectrum be the only answer? or can DOCSIS 3 be worked on. Bonding aside, could VM do other things?
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1) It's a shared, CSMA-TDMA network. Openreach fibre is not. Every modem has to guess and randomly try to send data requests on VM. On Openreach fibre anyone or any step wanting to send data can always just send immediately.
2) It's a RF hack over a coaxial network. You're basically shoving a ton of wifi signals down a copper cable instead of an antenna. Fibre is, well, fibre using purpose-made Ethernet protocols.