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Old 14-11-2013, 08:13   #200
MUD_Wizard
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Re: Virgin Media 150Mb Coming 2014

Quote:
Originally Posted by craigj2k12 View Post
With the 120Mbit config set at 133Mbit, that leaves 1Mbit of shared capacity left over, although, again, not a likely situation, and will also vary area by area see here for a simple explanation of bandwidth contention, its not something that can be plotted, or have rules applied to it, it varies area by area, and VM have to manage it as so
There's 54 Mb's per 256 QAM channel x 8 = 432Mb.
You already counted Docsis overheads in the 133Mb config.
So ~33Mb left over, but lets not quibble over a few Mb.

I'm not making rules for contention, just showing that you are wrong about the VMNG300 having no impact on speed vs the Superpup.

---------- Post added at 07:13 ---------- Previous post was at 07:06 ----------

Found another reason why VM are advertising 152Mb (see page 5):
http://www.cablelabs.com/cablemodem/.../docsis_30.pdf
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