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Originally Posted by James Henry
Dude I can see you have an interest and need to get a job with a cable company to use that interest a bit and see how things work in the real world. What you're discussing is still experimental technology and no standard has been finalised and ratified.
Bonded channels aren't necessary to run 10Mbit, in Sweden UPC are delivering 24/8 without bonding channels, and in Chrysalis' case the performance issues are I believe a bit of a mystery and the situation isn't nearly as bad as he thinks.
A part of the reason for it being easier there is I guess that UPC don't feel the need to fill their entire downstream spectrum with crap DTV multiplexes full of ****e that hardly ever gets watched, and instead save channels here and there to shove some of that lovely stuff that really makes the money, broadband, down.
If you're that interested ntl could remove congestion issues in some areas overnight without resegmentation if there's a channel free and a card available, no need to do any physical work outside of the headend. I guess there are certain reasons why they aren't, probably procedural / managerial actually.
I would imagine if it weren't for having to get things signed off in blood by about 10 different departments they could quite effectively resolve most issues through a combo of 2nd downstreams and 16QAM returns. Only areas where the upstream is incapable of supporting the additional power demands of the 16QAM, the channel plan is so full there's not even a single channel available for another DOCSIS downstream, or there's not an MC28U card available would this potentially be an issue.
BTW network condition is in most cases not an excuse for 16QAM being an 'issue', considering that I know of operators in Europe and North America who run 6.4MHz wide 64QAM upstreams with DOCSIS 2 which are far more demanding on the network.
With your allergy to contention you'd be scared if you knew how many 512k, 1Mbit and 2Mbit home users BT have been able to cram onto a 4Mbit pipe in the past with no issues  |
Maybe I should get a job with them but it isn't very reassuring when every ex/ntl employee doesn't really have, well anything good to say about them
I say channel bonding is where its at because as its regularly drilled into everybody here, ntl is a company where money is where its at and I know what sounds better to investors if the say they have eased congestion or eased congestion and offered higher and better speeds.
I don't mean to argue or patronise with such a fountain of knowledge since you obviously know more about these things I do but multiple downstreams is the same as bonding, just we get thre bonus of being able to use that spare bandwidth across them when its not being used.
Also with those taking the leet tier are shifted off to other channels for the new tech, everybody can be happy. I'm at least half right, aren't I?