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nakedmolerat

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#19832 3-Mar-2008 10:27
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hello all,
does anyone know when will the new 25mbps roll out start? i have been waiting and waiting for that to happen ...

in wellington, a friend of mine live in an area where the cable speed is not that fast, therefore, telstra refund back $10 per month. this sounds like the cable network is over-load in his suburb...

another 1 or 2 years before i can have this speed???


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freitasm
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#114302 3-Mar-2008 10:44
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Waiting...




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jpollock
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  #114319 3-Mar-2008 12:46
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My personal expectation is that when ADSL2+ hits Johnsonville, TCL will say, "Oh, hey, look, have 25mbps".  Until then, they don't have much reason to offer it.  It's not like we're going to pay more for it!

Well....  some of us might. :)




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  #114320 3-Mar-2008 12:57
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I know a few guys who are on the trial, and they say its a lot faster for local traffic.... but unless you are getting more than 800KB/s+ then going from a 10Meg plan upwards there isn't much point.

For providing LAN access into offices etc from home I can see a point.  However NZ's intl link is too constrained (or the providers aren't paying any more to increase capacity) that any increase in speed will be seen only until your first intl hop.

And since TCL don't peer with WIX.  Not sure if Xtreme / SNAP / other ISP's that re-sell TCL Cable are offering or planning to offer the 25MB/s....




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DonkeyKong
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  #114441 3-Mar-2008 21:18
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It's coming.......

Crowbar
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  #114484 3-Mar-2008 23:30
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It'll be sweet if you have good international sources / contacts for what ever you are doing with your internets.

I have a feeling its not far. They did say March!

doppleganger
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  #116325 13-Mar-2008 13:09
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BarTender: I know a few guys who are on the trial, and they say its a lot faster for local traffic.... but unless you are getting more than 800KB/s+ then going from a 10Meg plan upwards there isn't much point.


Actually international speeds are constrained more by latency and TCP window size than anything else. It breaks down like this:

BWbps = 8 * RWIN / RTT

Or in other words, your bandwidth in bits per second = 8 times the tcp window size over the latency in seconds.

Your tcp window size is the amount of data your machine will accept before sending a tcp ACK back to the other end telling it "Yup, got all that stuff you sent". If it's too big and you loose a packet, you loose a ton of data cause tcp needs to send all of the packets since the last successful ACK and your connection "speed" goes to poo.

Similarly if your window size is too small you just won't be able to suck very hard... In fact a latency of just 30ms is enough to limit max threwput to about 4.5Mbps with a default xp tcp window size of 17520Bytes as you can see:

8 * 17520 / .03sec = 4,672,000 bits per second

Fortunaelty for us modern operating systems such as later versions of linux, Vista and Leopard, both comply with this magical RFC: RFC1323 "TCP Extensions for high performance":

http://www.faqs.org/rfcs/rfc1323.html

and support dynamic tcp window sizes.

RFC1323 documents tcp window scaling, which lets your window size get above 64K, and dynamic tcp windowing means your os can decide on the fly what the window size should be, so you don't need to futz around in the registry or whatever to make your downloads work faster.

Unfortunaetly XP does _NOT_ support dynamic tcp window scaling. It does support rfc1323 if you mess with the registry, but then you have to statically set the tcp window size in there as well. Set it too big tho and things start going seriously strange on you, IE and MSN seem to be particularly flaky up above 128K or so.

Here's a link with some more info on TCP Tuning for high performance (don't blame me if your system goes haywire if you use any of these):

http://www.psc.edu/networking/projects/tcptune/

And while I'm on the topic I should point out that BANDWIDTH DOES NOT EQUAL SPEED. Just because your 1 download isn't going at 25mbps, or whatever, doesn't mean you're not getting the bandwidth you're paying for.

Say for instance you're downloading something from the states, using xp, and you've set your TCP window size to 128K, pinging google it's about 180ms away from where I am right now so the max threwput is:

8 * 128000 / .18 = 5,688,888 bits per second or 5.4mbps...

Even if you're on a 25mbps plan youre NEVER going to get more than 5.4mbps on 1 tcp stream, the trick to filling your 25mbps pipe is to download multiple things simultaneously.... You could quite happily suck 4 downloads from places with the same latency before the rate limit on your connection started playing into things.

michaeln
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  #116344 13-Mar-2008 13:50
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And this link points to a handy calculator that will show what you might get. Note that the O/S section is a little out of date. You also need to check things like half/full duplex on the Ethernet (some autosensing gets it very wrong), USB interface (overheads tend to make it slower than Ethernet).



Horace
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  #117432 18-Mar-2008 22:47
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Their faults dept said once they finish upgrades, they may be thinking of rolling it out.

freitasm
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#117448 19-Mar-2008 06:44
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Horace: Their faults dept said once they finish upgrades, they may be thinking of rolling it out.


There's no "may be thinking of rolling out". This was promised to December 2007, and then TelstraClear advised of delays. So it is not the question of "IF" but "WHEN".




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  #117449 19-Mar-2008 06:52
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Agreed.  I would expect once all the changes on the TV side have been completed they would be looking at rolling out "into production" rather than the handfull that are testing it that I know of.  If I were TCL I wouldn't want two different teams making changes on on your HFC network at the same time.




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tknz
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  #119763 30-Mar-2008 22:03
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who do you know that is on the trial? I didn't hear a release about it, get them to email me I'd love to hear about it, I'm in Enterprise and Govt Operations, so don't deal with consumer, still wonder how I missed the media release, as far as I knew splitting off the tv nodes from the data was the priority first.... two different teams? it's one team lol... I

freitasm
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#119765 30-Mar-2008 22:07
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A press release was sent out in June 2007...




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tknz
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  #119770 30-Mar-2008 22:20
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no I meant an internal release.. we always hear about whats going on in other divisions - and I new that they were splitting of the cable network nodes from the tv network nodes first... thats why I was wondering who the person new that was on the trial already

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#119793 31-Mar-2008 05:13
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Lucky CHCH people....

http://stuff.co.nz/4455880a28.html




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jpollock
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  #119802 31-Mar-2008 08:12
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229? That's an insane price.  I guess they're looking to make some money while Telecom can't match the speed.

Hrm.  If I cancelled cable TV, I'd be paying the same total price per month...

On the other hand, I rarely get 10mbps now, so I wouldn't expect to get 25, which means there isn't much point to the new package.




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