09-02-2005, 17:13
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#1
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Inactive
Join Date: Jan 2005
Posts: 5
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Broadband upload speed
Why does telewest have such a poor upload rate compared to all the rest! On a 1Mb download they only have 128kb upload. 
Does anyone know if they are going to improve it and when?? 
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09-02-2005, 17:46
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#2
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Location: norton , teesside
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Re: Broadband upload speed
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09-02-2005, 17:53
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#3
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Inactive
Join Date: Jan 2005
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Re: Broadband upload speed
Yer I supose a simple ask may help but yep the 1mb is only 128k, but the 2mb (£35) is 256k and the 3mb is 348k (£50).
Plus thank you for the welcome.
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09-02-2005, 19:08
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#4
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Inactive
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Re: Broadband upload speed
The upload is slow because of the origins of the 1Mbps service. Originally it would have been the snails pace introductory download at 128 or 256 Kpbs. Althouhg they have increased the download speeds, they have not upgraded the upload by a similar factor. Essentially Telewest still want you , the user, to decide you need more Oomph, and pay the extra pennies for a faster service alround.
The same will hold true for ntl, when they do their "coming soon" upgrades.
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15-02-2005, 20:58
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#5
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Inactive
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Re: Broadband upload speed
The 3mb service never had a upload of 384kbs!!!! Only the 4 mb has a 384 upload... Sorry m8. They are in the trial phase of a 14mb download not sure what upload is yet... I'll keep you posted.... By the way I'm a Telewest Service Tech
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15-02-2005, 21:01
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#6
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Re: Broadband upload speed
14Mbit is a bit of a jump from 4 isn't it?
Are you sure that the Telewest network could handle such an upgrade, I'm far from convinced, that would make TW the fastest cable company in the world for downstream 10Mbit is the fastest any cableco has done to date and very few have managed to do this painlessly.
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16-02-2005, 15:38
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#7
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Re: Broadband upload speed
Companies in the states have 10mb download stream. And yes we are trialing it... The network is capable of about 50mb down stream per customer.... All we need to do is open up more QAM's. The problem we have at the moment is we still provide Analogue to people... How sad!!!!!lol. Cuz we work though a RF network we get reflections of other frequence's up and down the bandwigth which provent us... this is all caused by analoque. Digital is better and cleaner on the network but we still need to work on it.. By the way each QAM is capable of 140mb downstream and take up 8mhz on a 1ghz local network which will feed about 350 homes. So the maths say ....... YES we can do it... I still don't know the upload though... Keep you posted
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16-02-2005, 15:46
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#8
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Re: Broadband upload speed
Quote:
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Originally Posted by matt2056
By the way I'm a Telewest Service Tech
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Welcome to the forums matt2056 - I think you may be our first TW Tech (unless I've missed someone).
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16-02-2005, 16:03
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#9
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Inactive
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Re: Broadband upload speed
Cheers m8. hope I can be of service to ya all!!!!!!.......
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16-02-2005, 16:40
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#10
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Re: Broadband upload speed
Quote:
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Originally Posted by matt2056
Companies in the states have 10mb download stream. And yes we are trialing it... The network is capable of about 50mb down stream per customer.... All we need to do is open up more QAM's. The problem we have at the moment is we still provide Analogue to people... How sad!!!!!lol. Cuz we work though a RF network we get reflections of other frequence's up and down the bandwigth which provent us... this is all caused by analoque. Digital is better and cleaner on the network but we still need to work on it.. By the way each QAM is capable of 140mb downstream and take up 8mhz on a 1ghz local network which will feed about 350 homes. So the maths say ....... YES we can do it... I still don't know the upload though... Keep you posted
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Your entire HFC network is 350 home nodes with no combining?
Isn't the Telewest network DOCSIS 1.1 not EuroDOCSIS (so each MCNS broadband channel will use NTSC spec 6MHz not PAL spec 8MHz).
Don't uBRs / CMTSes emit their own QAM carriers (maximum usable bandwidth downstream on a single DOCSIS 1.0/1.1 downstream @ 256QAM approx 36Mbps) which are simply upconverted rather than needing a QAM unit to modulate them? To produce 140Mbps on an 8MHz channel you'd need 24 bits per symbol and kit to do that doesn't exist as the RF SNR requirement would be astronomical? Highest there is right now is the DOCSIS 2.0 standard 512QAM and 1024QAM, 9 and 10 bits per symbol respectively?
Aren't QAMs the modulators for VOD and other TV signals only, and the 140Mbps throughput is a reference to multiple RF channels being modulated simultaneously, or possible a reference to using statistical multiplexing and a reference to the amount of MP2 they are rated to mux and VBR control?
Apologies to those who didn't understand all of that 
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16-02-2005, 16:46
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#11
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Re: Broadband upload speed
You are right in the aspect of tv channels!!!!! WE also carry our broadband down to... The Qam used is only 64 but we can use 256 aslwell which they ain't currently. Plus we use 8mhz on TV and Broadband not 6!!!! we can send both down at the same time... The equip isn't running fully yet and they prop won't untill the demand is there...
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16-02-2005, 17:26
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#12
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Re: Broadband upload speed
Quote:
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Originally Posted by matt2056
You are right in the aspect of tv channels!!!!! WE also carry our broadband down to... The Qam used is only 64 but we can use 256 aslwell which they ain't currently. Plus we use 8mhz on TV and Broadband not 6!!!! we can send both down at the same time... The equip isn't running fully yet and they prop won't untill the demand is there...
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Telewest's standard upgrade procedure is to use 256QAM rather than resegmentation. Telewest have been using 256QAM since the first half of last year as an upgrade scheme.
You can't send TV and broadband down a single 6 or 8MHz band at the same time, you can only send a single RF wave at a time and MCNS requires a dedicated channel.
This DOCSDIAG report from a Telewest uBR:
Channel Freq Max Usage Users Min Ave Max
MHz kbps kbps ms ms ms
Dnstr 0 331.00 30342 12170 307 15 42 469
Dnstr 1 331.00 30342 18265 220 15 45 484
Dnstr 2 331.00 30342 14341 218 15 43 469
Dnstr 3 331.00 30342 16422 305 15 40 422
Indicates that DOCSIS is being used, 30342kbps being the gross throughput of a single 6MHz 64QAM DOCSIS channel before RS error correction overheads - 5.056941 Msymbols/second @ 6 bits per symbol.
Eurodocsis supplies 41.712Mbit/s pre-RS on a single 8MHz 64QAM channel, 6.952Msymbols/second @ 6 bits/symbol.
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16-02-2005, 18:25
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#13
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Re: Broadband upload speed
I'm not disputing that.. And I'm not saying that we send them down on the same frequency!!!!!!!!! Not sure on the specs my self... obviously you know more about this than I..... All I know is no matter what you say there are poeple in our headend which I go in that are testing 14mb....
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16-02-2005, 18:37
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#14
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Re: Broadband upload speed
I'd settle for 4M right now .....
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16-02-2005, 19:51
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#15
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Re: Broadband upload speed
I hope that if they are having a play with configs none of the users scan then nick the modem config if it's being held on public servers!
ntl have had a few plays with 10Mbit but no real 'trial' as such just the odd tech testing to see how things go when testing CPE / new CMTSes, or because they need something quickly *looks @ BBKing when he was comissioning stuff*
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Quote:
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Originally Posted by Paul M
I'd settle for 4M right now .....
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I wouldn't, I demand at least 8.
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You are here: 
, ntl's 1mb then 1.5mb is 256k , sorry for asking but are you sure it is 128k , 
