Line speed ADSL v ADSL2+

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Marmion

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#27818 7-Nov-2008 12:58

Hi all,

TCom has recently sent me a new wireless modem/router due to our exchange now being ADSL2+. My question is: Wheres the speed difference? Initially I thought it would be due to the upload being capped so I've waited for it to be uncapped (which it is now clearly), but it remains at being stuck at the same speeds. In fact, the D Link consistently syncs at higher downstream speeds (usually connection is about 5mbps with the D Link and 4mbps with the Thomson). These tests were with all filters & phones etc taken out, so only the router is connected to the phone line.
Is there something wrong with the Thomson router? Isn't ADSL2+ supposed to be faster?!

Using ADSL2+ (new TCom Thomson router)

Using ADSL (G604T D Link)

Edit: I should clarify, D Link connects at 5mbps with phones connected as normal, Thomson at 4.160mbps with phones connected as normal. Upload is approx 512kbps for both with phones connected. With everything disconnected its around 700-800kbps (with D Link being 800+).

What I really want to know is: Am I actually getting ADSL2+ considering the D Link is actually faster?

coffeebaron

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#176645 7-Nov-2008 14:42

You are right on the border line of whether 128up or FSup will be much different, as generally you max out around 3.5-4Mbps with a 128up cap. The D-Link was quite possibly ADSL2 anyway, and different routers behave differently - thus the differing sync speeds.
Also around the 4Mbps mark, your are likely around the 4km mark from exchange, so ADSL2 won't make much difference at this distance. Keep in mind too, that 15-20% of your sync rate is used in overheads, so syncing at 5Mbps, means closer to 4Mbps of actual throughput.

So really the upshot is, it will pretty much be much for much for you :(

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cyril7

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#176785 8-Nov-2008 08:15

Marmion, its senseless posting a speedtest result when you want to talk about just one small part of the connection between your house and a remote server. What does your ADSL stats page in the router tell you the connection is, thats all that counts when talking about the speed diff between one DSL connection and another, the rest is all ISP network issues that your DSL connection has no say in.

Also note that depending on your line length, once you step over roughly 3km line length the advantage of DSL2+ is not that much better if any than DSL1. And as CB says depending on what model DLink you have it may already be syncing at DSL2+.

Cyril

Marmion

59 posts

Master Geek

#176799 8-Nov-2008 10:47

Thanks guys, just confirming what I thought basically. Was hoping maybe that they had to switch you on to adsl2 but doesn't appear to be the case! The line attentuation is around the mid to high 30's so 3km would be about right. A bit of a shame but to be honest I doubt it would make much of a difference!

cyril7

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#176811 8-Nov-2008 11:47

Hi, if in the high 30s then you should still have a sync speed around 7-8Mb/s, which with the right ISP and server connection is near what you could achieve.

cyril