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ADSL2/2+ in Dunlop area?

By hunter222a - 22 April 2008 25

Hi, has anyone in the Dunlop area been able to get an ADSL2/2+ connection?

I’ve been told that it runs off a RIM from the Melba Exchange.

What’s Your opinion?


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25 Responses to
ADSL2/2+ in Dunlop area?
natecv8 7:30 am 23 Apr 08

JC said :

With RIM users, a DSLAM needs to be placed in the street. There are two problems. Space and cost, as each ISP would require their own DSLAM in the street. Not likley. The problem is’t a bandwidth problem, I mean to say there is quite a lot of fibre in the street and each fibre can carry a rather large amount of bandwidth. As for ADSL2 if Telstra upgraded their DSLAMs for ADSL2, it would be all well and good, but would they then onsell it to ISP’s for a reasonable cost? Doubt it? Would an ISP be willing to put a DSLAM in the street for what is potentialy a few users? Doubt it.

The majority of your post was correct, but this part is wrong. RIM devices use telco-standard connections such as E1 (2Mbps) connections back to the exchanges (see http://whirlpool.net.au/article.cfm?id=1045&show=al). Yes they use fibre links back to the exchange, but this is telco equipment which has long considered data transfer as small 64kbps streams. To get the sort of capacity (100Mbps, 1Gbps) we see out of fibre these days would take an upgrade of the transceivers and switches back at the exchange, and would be way more costly.

Your argument about requiring multiple telco installations is also wrong. In this case, ISPs would have access to any Telstra ADSL2+ Minimux ports – if there were any – in exactly the same manner as they do with ADSL1. The simple fact is there’s just not the bandwidth to support it.

JC 5:05 pm 22 Apr 08

montana you are talking out your bum. Pair gains are used in older suburbs to increase the capacity of the copper lines from the street to the exchange. Ie they have two exchanges lines, they stick em in a pair gain unit, then use 1 copper line to the street where they split in two again.

A RIM for all purposes is like taking part of the exchange and putting it in a cupboard in the street. The copper from the houses run to the RIM, then fibre back to the main exchange. If the RIM is a non integrated type you also have trouble with dial-up speed, the units in Dunlop are non integrated.

ADSL technicaly has nothing to do with a RIM, but is run through DSLAM’s. In a non RIM configuration the DSLAM sit in the exchange building. Your copper line comes from the street and then is first run into the DSLAM (bit similar to the filter at the house end), where another line splits off to the telephone exchange for your phone circuit. Many of the major ISP’s have their own DSLAMs in the exchange, even more so with ADSL2. As far as I am aware Telstra do not sell ADSL2 wholesale like they are required to do with ADSL.

With RIM users, a DSLAM needs to be placed in the street. There are two problems. Space and cost, as each ISP would require their own DSLAM in the street. Not likley. The problem is’t a bandwidth problem, I mean to say there is quite a lot of fibre in the street and each fibre can carry a rather large amount of bandwidth. As for ADSL2 if Telstra upgraded their DSLAMs for ADSL2, it would be all well and good, but would they then onsell it to ISP’s for a reasonable cost? Doubt it? Would an ISP be willing to put a DSLAM in the street for what is potentialy a few users? Doubt it.

As for copper from Dunlop to Melba exchange, you will find there is not very much at all, if any. Besides depending where you are in Dunlop the distance might be starting to strech it a bit for ADSL2.

RandomGit, you will find that Macgregor West will like most new developments, especialy so far from the exhcnage will end up RIM’ed as well.

NathanaelB 4:17 pm 22 Apr 08

I’m on ADSL 1.5 out at Amaroo at the moment and I’m well happy with it – it’s as much as I need. And I’m even sharing it (through the Free Australia Wireless project).

FoMoCo 4:06 pm 22 Apr 08

I am in Dunlop and ADSL1 the best I can get. It is just wholesaled Telstra ADSL1 through Westnet. As there is no ISP that actually owns the ADSL1 hardware.

I dont know about spare capacity, but when I got it 15 months ago there was no delay. And the only way to get ADSL2+ is if Telstra upgrade the hardware in the RIM… ie fat chance 🙁

Transposing from what I was told is moving off pair gain to a direct line. So you cant get that done in Dunlop as each house is already on its own pair.

Think of a RIM as a mini exchange with a fibre link back to the main exchange ie Melba.

Basically you have to get ADSL1 and live with it 🙁 At least it is better than dial-up

NathanaelB 1:40 pm 22 Apr 08

Excellent!

lemaChet 12:46 pm 22 Apr 08

nathanaelB – Macgregor is Scullin exchange….

Spectra 12:25 pm 22 Apr 08

montana: Actually, transposing your line means they move you off the RIM entirely and therefore you can get ADSL2+. If you remain on the RIM, the best you can hope for is ADSL(1). Even that can be a bit of a long shot – from memory a standard rim has something like 32 ADSL slots available, but can be servicing anything up to 450 phone lines, and it’s first-come, first-served.

In answer to the original question, Dunlop is indeed entirely on RIMs from Melba. I don’t know whether or not anyone’s had any luck getting a transposition done – Telstra are highly unlikely to do it if there’s still ADSL space on the RIM you’re on. Even if they do, it can take quite a while to get done (I waited something like 3 months when I got my line in Amaroo done).

Best bet for info on this stuff is whirlpool.net.au.

NathanaelB 12:03 pm 22 Apr 08

I’ll be wanting to know for when I move to new Macgregor suburb in Jan next year!

RandomGit 11:54 am 22 Apr 08

Melba exchange has ADSL2+, I’ve been on it for months.

Whether or not Dunlopians have access to the same equipment is beyond me.

Holden Caulfield 11:26 am 22 Apr 08

Dunlop, pfft, what about Fyshwick FFS!

montana 11:08 am 22 Apr 08

It’s technically possible to get ADSL (not ADSL 2+), however it all depends on whether or not Telstra are willing to transpose your line. Im guessing you are on a pair gains to a RIM in Dunlop. Stupid telstra did things on the cheap and now dont want to upgrade people to copper which they should have used from the start.

NathanaelB 10:27 am 22 Apr 08

I had to wait a year for Telstra to open up more ports at our local Crace/Mitchell Exchange a few years ago after placing my ADSL order 🙁

natecv8 10:17 am 22 Apr 08

RIM users can get ADSL, as long as there’s sufficient ADSL enabled ports in your RIM node. Forget ADSL2+ though, there’s just not enough aggregate bandwidth from the nodes back to the exchange to offer it in the first place, which would make it a pretty bad investment for Telstra to buy ADSL2+ enabled cards for the RIMs.

I’ve heard all sorts of stories regarding the ability to get clean copper back to the exchange (if that’s an option in your area) by convincing Telstra that you need it for ISDN/alarm communications/whatever but they’ve probably caught on to this by now, if it ever worked.

Primal 10:15 am 22 Apr 08

MelonHead said :

RIM = nil ADSL afaik

Nil ADSL2/2+, correct. Normal ADSL is still possible.

MelonHead 9:45 am 22 Apr 08

RIM = nil ADSL afaik

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