Kitz Forum
Broadband Related => Broadband Technology => Topic started by: adslmax on June 05, 2016, 11:45:21 AM
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Interesting stuff here about BT G.fast chipset:
http://www.sckipio.com/cp1000-g-fast-cpe-chipset
http://www.sckipio.com/dp3000-product-detail
I think BT Openreach are using cp1000-g-fast chipset for g.fast modem or router.
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Thank you for those links to the reference material, Max.
To date I have not seen any information from BT's research department at Adastral Park, so any information is interesting.
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BT have been trialling chipsets from several firms - and I know they recently said they had chosen what they plan to use for their forthcoming 25,000 trial - any reason you think this will be Sckipio?
I suspect that like FTTC, we will eventually see Openreach use two different firms..
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I suspect that like FTTC, we will eventually see Openreach use two different firms..
A minimum of two . . . maybe more. ;)
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Who is confirming your info adslmax?
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http://www.ispreview.co.uk/index.php/2016/01/a-quick-look-at-bts-early-uk-trial-of-g-fast-broadband-routers.html
From January this year.
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Openreach have been trialling g.fast equipment from ADTRAN, Alcatel-Lucent and Huawei. That ISP Review link just shows the compatible CPE's used in each trial.
I believe only ADTRAN’s kit is based on Sckipio chipsets - if I recall correctly, the others are based on Broadcom chipsets (though Alcatel may use Ikanos instead)
Adslmax seems to suggest that Openreach have opted for the Sckipio chipset for their 25,000 pilot and if that's the case, it would be good to know the source. Afaik BT confirmed they had chosen a chipset but not who.
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Beyond the pilot, BT needs a vendor that can give them 48-port and 96-port nodes, which don't exist yet. I'm surprised they'd want to lock down on vendor choice just yet.
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If openreach are capable of learning from past mistakes they wont use ADTRAN on the commercial rollout. Stick to just broadcom only and maybe they will hit less trouble this time round.
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What about the revision to allow higher power for G.fast i thought that standard wasn't finished yet, surely BT won't commit to any hardware before hand.
Range of 300mbps is currently ~250m with the new standard they're looking to increase the range.
I though Skipio had the best G.Fast chips or is the problem Adtran?
They aren't just going to use one vendor it's too risky.
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They can use two vendors but have both vendors using the same chipset.
What is the risk of one vendor? it provides consistency, reduces testing costs and less maintenance.
There can be backup vendor used to keep the prime vendor on their toes should they slip up.
On VDSL both hauwei and alcatel use broadcom so e.g. those 2 could have been used for FTTC.
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Main risk of using one vendor is supply say the factories flood or the company goes bankrupt it would cripple the roll-out.
You can't really say to a 2nd vendor can you just have like 10,000 DSLAMs just in case this other guy doesn't deliver.
In terms of what chipset they should use broadcom is great but I was under the impression Skipio was the leader in G.Fast, but you are right using the same chipset across the board should in theory make all the modems work perfectly.
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Most companies I worked for make contracts with multiple suppliers, however alot of these contracts were standby only, they had to be ready to supply but no orders got made unless the first supplier failed for whatever reason.
In some cases I have also seen multiple suppliers at once and this did lead to a lottery in the product quality, e.g. at walkers crisps they had more than one supplier for the potatoes, but there was some very big variance in the quality from one supplier to another. The low fat crisps always had priority of the better potatoes.
If skipio this name I never heard off really is the leader, then yeah pick two vendors both using that chipset.
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If skipio this name I never heard off really is the leader, . . .
The name is Sckipio which (unfortunately) is an anagram of sicki po. :D
Sckipio Technologies (http://www.sckipio.com/), Ramat Gan, Israel.
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Have I been remiss in posting Sckipio information on here?
2014: http://uppersideconferences.net/g-fast-summit2014/pres-gfast2014/day_1/day_1_11_rami_verbin.pdf
2015: https://www.youtube.com/watch?v=HPDRS06t5Kg
http://www.slideshare.net/Sckipio/sckipio-gfast-presentation-at-tno-ultrafast-broadband-2015
2016: https://www.youtube.com/watch?v=6T8Iuejy9Jo
http://www.slideshare.net/Sckipio/david-baum-speech-at-gigabit-copper-2016
Edit: Added list of contributors to G.Fast standardisation in ITU and the predecessor 4GBB Celtic project.
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Beyond the pilot, BT needs a vendor that can give them 48-port and 96-port nodes, which don't exist yet. I'm surprised they'd want to lock down on vendor choice just yet.
BT had a 'Investor Day' (webcast on their site) recently where they briefly mentioned they had chosen a chipset for their 25,000 pilot but as you say they will want to keep their options open.
I believe 96 port nodes should be available by the end of the year.
As I posted above, I understand that Alcatel and Huawei units are using Broadcom chips and Adtran Sckipio chips. Broadcom's chip supports VDSL as well as G.fast. Sckipio's chip seem to perform better better but some telco's may want the flexibility of continuing to support VDSL.
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Why are you looking into G.fast chipsets when G.fast may never arrive at are doorstep it's a 10 year project and anything can happen from now to 2027
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Well as I'm closing to the Cab I'm expecting it by 2020 rollout should start summer 2017, but I'm waiting on what the revision to the spec brings Hopefully it
ups the range to 400m.
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It just seems to early to predict or theorize on the hardware they will use but that's 3 years away for you and 5 - 10 years for me.
I just find it weird/strange to speculate on something that is in the future not just a year from now but 10 years into the future, me I would just stick to the current OR technology gezz we are still trying to work out how the DLM works ;)
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Well looks like neither BT or anyone else will be using Ikanos chipsets...!
http://gfastnews.com/index.php/90-r/252-qualcomm-fires-everyone-and-shuts-down-ikanos :police:
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BT should be thankful for vectoring eh?
Tests on the older, unshielded cables found in many buildings in Austria achieved speeds of 500 Mb/s over 100 m when a single line was active. However, when a second G.fast line was added, crosstalk dropped G.fast speeds from 500 Mb/s to just 60 Mb/s. G.fast with prototype Vectoring 2.0 technology removed the crosstalk and brought the speed back up to 500 Mb/s over 100 m.
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Both G.Inp (G.998.4) and G.Vector (G.993.5) are integral components required for a successful G.Fast (G.9700/G.9701) implementation. :)