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. :mad:

Does anyone know if they are going to improve it and when?? :confused:

Re: Broadband upload speed
 

how about a call to them to ask ;) , ntl's 1mb then 1.5mb is 256k , sorry for asking but are you sure it is 128k , :welcome: to the site btw . enjoy your stay :D :D :D

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.

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.

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

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.

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

Re: Broadband upload speed
 

:welcome:
Welcome to the forums matt2056 - I think you may be our first TW Tech (unless I've missed someone).

Re: Broadband upload speed
 

Cheers m8. hope I can be of service to ya all!!!!!!.......

Re: Broadband upload speed
 

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 :)

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...

Re: Broadband upload speed
 

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.

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....

Re: Broadband upload speed
 

I'd settle for 4M right now .....

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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I wouldn't, I demand at least 8.

Re: Broadband upload speed
 

I demand 10 :p:

Re: Broadband upload speed
 

Just been talking to one of the Network guys and they are saying that we might re-segment the downstream carriers freq. As you prob work out that if they re-segment it it would give us more to play with.. The problem we have with upstream speed is we use (i think there called QTA cards) on the UBR's. At a grand a piece they be a bit expensive... Down here in Glos and Chelt we have 50 of them. Because the upstream is at 20mhz - 29mhz it gets effected by the noise so they won't really consider going to QAM64 or above at that freq cux of the problems we would get. And the money to do it. We would have to treble our work force just to try and keep the noise down. Fun Hey... There are talks thou of moving the upstream channels to above 100mhz or above but it would mean replacing all the QTA cards. Again MONEY........ Anymore info I get I will post or if you got any direct Q'a pirvate message me.

Re: Broadband upload speed
 

matt question for ya m8ee
i want to run a radio station for my p2p prog users. on my 4mb how many users cud actually listen in without it seriously effecting my speeds?

Re: Broadband upload speed
 

Depends on the bit rate you use, 384kbps upstream will provide enough for 3 users at 96kbps, 4 users at 64kbps, while still leaving you a little bandwidth for downloading purposes.

Re: Broadband upload speed
 

by using sam broadcaster at 24kb will have enough for 10 or more then as it states on mp3pro sound is still good qual?
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do we have mysql function on servers is my next Q lol

Re: Broadband upload speed
 

You could shove more than 10 down it, but that's a nice safe limit so that your downloads won't suffer :)

Re: Broadband upload speed
 

@ Question for matt

Hi mate, when is the next upgrade to occur for all speeds, and by how much? May is it?

Re: Broadband upload speed
 

i have a 2mb download speed broadband cable but my upload only go upto 30kB/s is that how it supposed to be :(

Re: Broadband upload speed
 

i've just changed to telewest, and am very unimpressed by the upload speed. with adsl i was on 1024/256, but switching to cable, i'm on 1024/128. i really should have checked it out, but i didn't think to.

Is it likely that Telewest are going to upgrade anything? and in particular the upload speeds?

Re: Broadband upload speed
 

You can, get 2mb. 384k with the 4mb too.

Re: Broadband upload speed
 

Telewest have said before that the reason why they don't do upload speeds is because their running a comercial service and comercial customers should't be running servers or uploading lots of files.

Re: Broadband upload speed
 

Do you mean residential instead of commercial? You supply a commercial service to business custs ;)

Re: Broadband upload speed
 

Yeah sorry I meant non-comercial (ie Residential)

Re: Broadband upload speed
 

A question then that I read somewhere else but no-one ansered!

Re: Broadband upload speed
 

LOL I love it when people look up a few buzzwords and try to make out they have a clue.

Firstly MC28 cards offer 2 downstreams and 8 upstreams, that would suggest 4 upstreams per downstream, wouldn't it?

Secondly 3.2Mb? Erm, no, moved to 3.2MHz wide upstreams, which offer after overheads about 4.4Mbps a piece.

Third DOCSIS downstreams aren't only 27Mbps they can be 27 or 38.

Fourth, MC28 cards actually reduce the upstream bandwidth available per downstream most of the time - they are there where areas are using lots of downstream compared to upstream, and have certainly not replaced the MC16 cards.

Finally can't offer a more symettrical service because in some areas even with 10:1 ratio on downstream to upstream upstreams get maxed well before the downstream. Due to statistical contention 4x4.4Mbit doesn't go nearly as far as 1x17.6.