How does DSL works in ZA?

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madrynn

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If anybody can shed a bit of light on this... this is just what I THINK happens, and if you know better please help out.

So what I have been able to piece together is that I get my access from telkom, which is a copper wire between my modem and the closest exchange... which has equipment called MSAS, SSEXY, LMAO, WHATEVER and etc.

At the exchange, the device I'm physically connected to, acts like a bandpass filter for every other user also connected to it and on the other side it combines everybody onto a (hopefully) larger connection that connect to... what?... (getting a bit fuzzy) a bigger exchange I suppose?

That exchange is then again connected up/down the line to my ISP (which I connect to using some kind of rudimentary DNS server and router) which is the gateway to their internet... pipe?

I'm sure this works on a lower level than IP4/IP6 because my first tracert hop is already at the ISP.
From my side it's called a DSL line, on the ISP side it's called IPC.

Now let say the ISP buy a 1mbit IPC, how do they then regulate the 20 users who are all also connected via a 1mbit connection? or do I have the cat by it's tail?

Thanks!
 
Thank you again!
I believe I have read this article before (without memorizing the names, hehe).

But this is kinda why I am asking, as far as I know the DSLAM sit at the exchange, but it doesn't connect me to the internet, not directly anyway. From there we in ZA still have to get to our ISP's first, and then from there to the internet.

And that black hole is what I'm wondering about. No website outside of ZA seem to even mention anything about IPC's.
 
OP said:
How does DSL works in ZA?
Click to expand...

it doesn't and it is all Telkom's fault :D

Sorry MickeyD I couldn't resist the urge to be the first to make such idiotic statements in this thread :p
 
http://www.ellipsis.co.za/wp-content/uploads/2011/06/MWEB_LLU-submission1.pdf

madrynn said:
Thank you again!
I believe I have read this article before (without memorizing the names, hehe).

But this is kinda why I am asking, as far as I know the DSLAM sit at the exchange, but it doesn't connect me to the internet, not directly anyway. From there we in ZA still have to get to our ISP's first, and then from there to the internet.

And that black hole is what I'm wondering about. No website outside of ZA seem to even mention anything about IPC's.
Click to expand...
 
madrynn said:
Thank you again!
I believe I have read this article before (without memorizing the names, hehe).

But this is kinda why I am asking, as far as I know the DSLAM sit at the exchange, but it doesn't connect me to the internet, not directly anyway. From there we in ZA still have to get to our ISP's first, and then from there to the internet.

And that black hole is what I'm wondering about. No website outside of ZA seem to even mention anything about IPC's.
Click to expand...
from the DSLAM where aggregation happens the traffic moves to an Edge Server Router (ESR) where it gets onto Telkom's national backhaul IP network. ISPs (including Telkom Internet) get the traffic at another (the same if they have a presence at the initiating ESR) ESR which they pay for as part of an Internet Protocol Connect (IPC or IPConnect) product offering - there are 200 and something ESRs most ISPs have less than 3 [MickeyD do any ISPs have more than 3 - TI is the mystery to me] Points of Presence (POPs) which is an ESR where traffic can branch to their network. This exercise of connecting to an ISPs network is the essence of the Internet. Until quite recently I didn't realize that ESRs are where IPC happens
 
Thank you MickeyD!

Just finished the broadband laid bare article, and pieces are starting to fall into place... D:
 
madrynn said:
Now let say the ISP buy a 1mbit IPC, how do they then regulate the 20 users who are all also connected via a 1mbit connection? or do I have the cat by it's tail?
Click to expand...

What do you mean by regulate? If you're referring to the numbers (20 1mbit users sharing 1mbit backhaul), it's called contention/overselling :)
 
It happened again, eish, OVERBOOOKIIIING!

Dean said:
What do you mean by regulate? If you're referring to the numbers (20 1mbit users sharing 1mbit backhaul), it's called contention/overselling :)
Click to expand...
 
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