interestingly it appears some of the other ISPs might be gearing up or at least getting ready to compeate with VMs 50Mbit BB later this year.
right now it seems theres only two companys in their Sharedband Service Provider list, but perhaps the likes of Be* etc might take the option at some point!
http://www.theregister.co.uk/2008/02/08/sharedband/
Faster broadband through bonding
Does doubling up your DSL really work?
By
Simon Rockman →
More by this author
Published Friday 8th February 2008 06:02 GMT
Sex, money and chocolate are supposed to be the three things you can't have too much of.
There is a fourth: Bandwidth. One way to have twice as much bandwidth is to have two lines, but getting them to work together isn't simple.
Sharedband, a spin-off from BT Martlesham, is poised to launch a UK service to do just this.
An ugly truth about broadband is that the speed you get falls far short of what's advertised. But while complaining might change the ISPs advertising, it won't change the physics.
In the past, networks have relied on everyone being so happy with the upgrade that it didn’t matter what the true speed actually was.
If you went from dial-up with a rated 56kbps (in reality usually closer to 30kbps) to 512kbps (in reality 300kbps) and "always on", it was such an improvement it seemed churlish to complain.
So the claim "up to 24Mb/s" really means 15Mb/s on a good day. Five means three, and three means one.
...
Using a second DSL line is a bit like fitting a second engine - but it has similar transmission problems. Getting the speed to one computer has been a mess. If you had two lines, two routers and two network cards you couldn't aggregate the speed. You'd get greater reliability - if one line went down you had the other - but you couldn’t download files faster.
The solution adopted by Sharedband is not to aggregate the channels in the PC but in the router. Sharedband has code which runs in the best selling ADSL routers which gives one router control over the other.
This manages the biggest problem, which is skew between the two lines. There are limitations: there's a limit to the speed of lines which can be aggregated, and the processors in the routers might not be able cope with two 24Mb/s lines. For those applications Sharedband is investigating a PC-based solution.
At a demonstration in their Ipswich office - with the poetic postcode of IP4 - the start-up showed downloads of between one and a half and close to two times the single line speed.
It was also fault-tolerant: one router could be unplugged and although of course the speed dropped correspondingly, the download continued. The resilience is improved if you use two ISPs, ideally through two different exchanges, although this might be hard to arrange.
There is no need to have both lines through the same ISP - indeed Sharedband recommend that you don't.
Sharedband is concentrating on wholesale deals and already has reseller agreements with BT Wholesale and Netgear.
Trial installations have shown that it's the increase in upload speed which is often most attractive.
An installation at Mallory Park race circuit for the British Superbike Grand Prix allowed the attending journalists to upload stories and pictures at three times the speed they had the previous year.
As a robust, high-speed solution Sharedband is concentrating on the small business market, but it might also be just the thing for the dedicated surfer, or enthusiastic home user.
Sharedband says it will go live in the next few weeks - the company's FAQ is
here. ®
"
http://www.sharedband.com/technology07.html
if it wasnt for the long time policy VM have of not allowing more than one single cable modem per account, then they too could also bond even the old docsis1 modems with this type of 3rd party firmware update, as iv been saying for a very long time now, network bonding is good.
but still, there seems to be a possibility people can combine cable and ADSL if your ISP is in the list.
i wonder if this companys productes take off, VM might reconsider the one modem per account rule, and start making some reasonable extra modem/BB profits from their current userbase wanting more upload speed etc?
http://www.sharedband.com/technology09.html
....
Q: Is Sharedband limited to ADSL or can I use SDSL/Cable etc?
A: To use Sharedband for non ADSL connections you will need to use the Linksys WRT54GL wireless router in series with your existing broadband modem provided by your ISP.
When it is "Sharedband enabled" the Linksys WRT54GL provides a WAN neutral solution suitable for use with the vast majority of broadband connections.
If you have and ADSL broadband connection you can use a "Sharedband enabled" Netgear DG834 ADSL modem router - this means you are not required to have a separate modem device.
...
"
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