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Old 03-12-2011, 09:15   #36
greyhairbadger
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Join Date: Sep 2011
Location: Birmingham, England
Services: Virgin Media HFC broadband
Posts: 17
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Re: Small Download Speed Upgrade

Hi,

Sorry to be a bit thick, but I figure if I don't ask, I won't find out:

What is the nature of the overhead?

I presume 102.4 Mbps is raw data rate, and 98 Mbps represents the encoded ethernet packets (frames? datagrams?)
If so, what is in the 4.4 Mbps? and is it encapsulated? Is it associated with the modulation / demodulation process?

Or am I barking up the wrong tree entirely?

Phil.
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