ISP limit speed of ADSL

kevinxox

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Jun 14, 2004
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I'm doing a seminar regarding ADSL. Can u guys tell me how does ISP limit the speed for each ADSL subscribers?
Can recommend some sites i can find more about that? thanks...
 

MaD

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AFAIK ISP's don't limit the speed. The only area where limitation comes in is from Hellkom's side:

A) with regards to port prioritization and bandwidth throttling, and
B) when the CAP comes into effect and international is slowed down to a grind

<font color="navy"><font size="1"><b>Where others have progress, we have Telkom.</b>
Hellkom website - http://telkomsucks.0catch.com</font id="size1"></font id="navy">
 

Karnaugh

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VISP's (For ADSL everyone except Telkom is a VISP) have no controll over their clients connection as far as bandwidth or anything goes, only authentication.

- Colin Alston
colin at alston dot za dot org

"Getting traffic shaping right is easy and can be summed up in one word: Dont." -- George Barnett
 

James

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speaking of which, also outa curiosity, hypothetically speaking, If Telskum had all ports open and no prioritization no throttling or any thing would it be possible to get more that 512kb on our current infrastructure


There is no peace without war!!!
 

Karnaugh

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doubtfull since they only have 400Mbps of international peering

Nothing stops ADSL from scaling up to at least 2MBps local access though if they were to upgrade the local DSLAM peering which probably would cost them between nothing and very little.

Personaly I'd be happy with full rate 512K local access and 128K international if it were uncapped and unprioritised and half the price it is now. Then it would be at least close to international standards.

They do have a small point on the costs of international peering. However if we had a larger local infrastructure we wouldnt just be some piss-willy country at the arse end of the world. By the same token, If i can buy 1.2TB of bandwidth in the US for like R1000, why do i have to pay R1000 for 3Gb here? Telkom should surely be able to get it cheaper than me!

- Colin Alston
colin at alston dot za dot org

"Getting traffic shaping right is easy and can be summed up in one word: Dont." -- George Barnett
 

SK33T

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What I dont understand is why cant isp give int bandwidth after being capped, as you dail into there systems first,then you could use their bandwidth.Surely Telkom cant monitor how a isp is ditributing its bandwidth amongst its own subscribers?So why cant isp divert capped users onto their own throttled line that u can still get int access?
Hope im making sense here
 

Karnaugh

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They can but its too expensive to purchase international bandwidth from Telkom

R80000/m for 512k is just not worth it..

- Colin Alston
colin at alston dot za dot org

"Getting traffic shaping right is easy and can be summed up in one word: Dont." -- George Barnett
 

alex

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Oct 6, 2003
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Thats very ture i know that my ISP just implemeted that IDia but its hecticly expesive without an account for 64kb its something like R645 per month :( thats just not reasnabil
 

SK33T

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Even for a user just to be able to use 64 k ,imagine how many users it would pull in.
 

Karnaugh

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<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"> Even for a user just to be able to use 64 k ,imagine how many users it would pull in.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

You dont seem to be hearing me. even 64K of bandwidth is ALOT of money for ISP's, like R5000/m.

- Colin Alston
colin at alston dot za dot org

"Getting traffic shaping right is easy and can be summed up in one word: Dont." -- George Barnett
 
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