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Old 3rd January 2011, 5:06 PM   #1
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Default DSL network facts and figures

Kind of bored at work at the moment so I started mining some DSL network stats I found interesting.

Number of active services - ~3,300,000
Number of active DSLAMs - 15,768 (plus another 1,377 dedicated network hubs)
Least customers on a single DSLAM - 1
Most customers on a single DSLAM - 2,148

Smallest DSLAM in the network - the Extel LL-ADSL C8/R8-AS, 8 customers maximum
Largest DSLAM in the network - the NEC AM31, 2304 customers fully equipped

Some of the smallest DSLAMs are fed by a single 2Mbps link.
The largest has multiple gigabit links available (although in practice they only need a tiny fraction of that)
33.3% of the network runs on what can be characterised as "low bandwidth" links, ie 2-16Mbps. The remainder is a breakdown of ATM STM-1, gigabit fibre, and EoSDH software configurable links via ad/dropmux as required.

The network is comprised of the following hardware:
Alcatel - 69.8%
NEC - 29.2%
Extel - 1%

66.7% of the network is ADSL capable. The ADSL1-only equipment can be so for a number of reasons, including older model electronics, insufficient bandwidth to offer high speed services, or locking to ADSL1 in software due to technical reasons.

Some of the larger ISPs run around 6-700Mbps traffic across a balanced redundant gateway pair per state.


Click to view full size!


The smaller ones… are a bit smaller than that! (yes, that’s the *national* feed for one ISP.)


Click to view full size!
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Old 3rd January 2011, 5:26 PM   #2
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I take it this is only Telstra and Telstra wholesale ISPs, as i know there are many Ericsson and Huawei DSLAMs out in the field.
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Old 3rd January 2011, 5:46 PM   #3
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It's not our fault ISP's only offer 1mbps upload speeds
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Old 3rd January 2011, 7:42 PM   #4
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Be interesting to know if this covers consumer and business customers because you see much of the traffic is during peak periods.

I take it these are taken as interconnects between Telstra and ISP X, and as such all traffic types going out to that ISP even traffic that goes locally on-net.
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Old 3rd January 2011, 9:59 PM   #5
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Interesting figures. The small ISP mustn't have many customers...
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Old 3rd January 2011, 10:59 PM   #6
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Quote:
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love seeing cacti gettin some big city use.
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Old 4th January 2011, 6:55 AM   #7
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Quote:
Originally Posted by fR33z3 View Post
love seeing cacti gettin some big city use.
What makes you say it's cacti? The layout of the text actually suggests to me it's not, as last time i used cacti it didn't look like that as such.

Some interesting notes, and definitely would only extend to a limited number of services, as Telstra never really kept record of the DSLAMs one of my old companies was using (brand, throughputs etc) they could keep customer numbers but only because of the fact that Telstra had to jumper them over, thats all they really had to go on.
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Old 4th January 2011, 8:06 AM   #8
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What do you do for a crust, caspian? That's some pretty interesting stuff
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Old 4th January 2011, 8:31 AM   #9
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What do you do for a crust, caspian? That's some pretty interesting stuff
He works for "Telstra" (quoted as it could be Telstra, Telstra Wholesale, Bigpond (possibly more) or contracting through another company to any of the above), im pretty sure in the NOC, or something similar. In any case, Telstra related, and very broad network access it appears.
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Old 4th January 2011, 8:37 AM   #10
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Quote:
Originally Posted by Primüs View Post
What makes you say it's cacti? The layout of the text actually suggests to me it's not, as last time i used cacti it didn't look like that as such.
Agreed, it's using RRDtool (the same graphing engine that Cacti uses), but otherwise looks different to me.
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Old 4th January 2011, 8:40 AM   #11
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Thanks for posting the stats.

I'm a big fan of those BRAS/IGR traffic monitoring pages. It is RRDTool as cvidler mentioned.

A couple more for the Telstra network:

Installed ADSL2+ Ports : ~3500000
Installed ADSL1 Ports : ~2133000
Total installed ADSL Ports : ~5612000

IMHO we need some gear porn shots to go with the stats
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Old 4th January 2011, 8:46 AM   #12
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RDDtool is just a graphing tool, it takes raw data and turned it into a graph, you can even do it from a script if you got the brains.

And you can make it look how you want with a bit of messing around front ends like cacti just make is easy
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Old 4th January 2011, 9:20 AM   #13
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Quote:
Originally Posted by Primüs View Post
He works for "Telstra" (quoted as it could be Telstra, Telstra Wholesale, Bigpond (possibly more) or contracting through another company to any of the above), im pretty sure in the NOC, or something similar. In any case, Telstra related, and very broad network access it appears.
pretty much correct, although ask me again next week.

if anyone has any questions throw them up, but I reserve the right to answer depending on sensitivity.
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Old 4th January 2011, 9:32 AM   #14
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Quote:
Originally Posted by Primüs View Post
He works for "Telstra" (quoted as it could be Telstra, Telstra Wholesale, Bigpond (possibly more) or contracting through another company to any of the above), im pretty sure in the NOC, or something similar. In any case, Telstra related, and very broad network access it appears.
Thanks for the info!

Quote:
Originally Posted by caspian View Post
pretty much correct, although ask me again next week.

if anyone has any questions throw them up, but I reserve the right to answer depending on sensitivity.
What kinda of work do you do that gives you access to this kind of information? Are you a network engineer or something?
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Old 4th January 2011, 9:41 AM   #15
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I work across several roles at the moment. my primary expertise is in DSL and FTTP network engineering and level 3 assurance, but I also work with switching and transmission technologies, do some network (re)design stuff (mostly where the original design was bollocksed up), and some server assurance work.

most of the people in my team are fairly broadly experienced, but everyone has a couple of technologies they are experts in.
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