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Originally Posted by Sephiroth
I take Igni on at my peril - so I won't, this time.
You presumably mean that the CMTS has been upgraded to support 16 or more downstream channels and 8 or more upstream channels. You then ask how much increase in speed would you see in an over utilised segment.
Igni's answer is correct. To answer that question the way you would have liked needs more assumptions which can't really be provided. This notional "over utilised segment" concept needs to be bounded by the number of connected homes, their concurrency, segment and node details before/after any re-segmentation (if any).
You can say that if, without re-segmentation, they add downstream capacity such that the additional downstream channels are not pinched from an existing set, then at the instant of cut over to the new system, downstream congestion would be halved.
HTH and I await some scathing point of disagreement from Igni.
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Of course, I am not taking him on either
My question was, all other things being equal, if the CMTS has been upgraded to support the Hub 3.0 channel set, would you see any significant peak-time speed increase over and above the current 8 channel shub2. What I mean by "all other things being equal" is that there is no change in the segment topology etc. All we are changing here is the CMTS and corresponding CPE equipment.
Your sentence:
Quote:
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You can say that if, without re-segmentation, they add downstream capacity such that the additional downstream channels are not pinched from an existing set, then at the instant of cut over to the new system, downstream congestion would be halved.
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I think answers my question so thank you.
The reason I ask is that our segment into the Southampton headend has been over utilised for 4 years now so any change that doesn't invole a re-segmentation and just involves work at the headend may be more likely to happen. If it does, it would be useful to know that this work may alleviate the 200Mbps -> 20 Mbps speed drop-offs we currently get.
Snoop's earlier response indicates there may be hope