Splitterless ADSL2 is here

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tombrownzz

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#71869 18-Nov-2010 21:34

Was just checking out wikipedia and found out about a mode in ADSL2 that does not require the use of a splitter at your house:

http://en.wikipedia.org/wiki/Asymmetric_Digital_Subscriber_Line

ADSL2
ITU G.992.4
splitterless ADSL2
1.5 Mbit/s
0.5 Mbit/s

It just finished approval in 2007. Which isps in nz offer this and will the splitting just be done at the telephone exchange?

I checked my router and I cannot find 992.4 support but I do have adsl2 multi mode so would this mean my router can support splitterless adsl2?

I know the speeds are slower but maybe it will have less dropouts.

P.S
Does any nz isp support RE ADSL2 as it extends the range of broadband from 4km to 7 kilometers?

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#406462 18-Nov-2010 22:07

All seem to support RE-ADSL since I would often have that negotiatie and get a shocker of an upstream speed, forcing adsl2+ sorted that out.

Why would any ISP deploy a horridly slow solution to save the customer a few bucks on filters? IMO its a dead end that did not deserve to be developed.

IMO, a better idea would have been adding a filter to the requirements of any new telephone to be inbuilt. Firstly it might speed up the demise of BT plugs, and secondly it would make them actually put some effort into decent one instead of the 18 month lifespan retail DSL splitter junk that you get off the shelf from retailers.

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sbiddle

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#406531 19-Nov-2010 06:15

So you're happy with a maximum of 1.5Mbps using G.lite.bis? I suspect 99% of the population wouldn't be.

If you believe splitters are a hassle you fail to understand exactly what purpose they serve.

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#406560 19-Nov-2010 08:31

Hi, Splitterless DSL has been around since the begining of DSL formats, and was very popular in the US in the early days, but its speeds have long since be surpassed in peoples expectations.

Telecom have chosen (deliberately I suspect) not to use RE-ADSL simply becuase it does not meet their Government obligations for speed.

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#410103 27-Nov-2010 00:26

tombrownzz: Was just checking out wikipedia and found out about a mode in ADSL2 that does not require the use of a splitter at your house:

http://en.wikipedia.org/wiki/Asymmetric_Digital_Subscriber_Line

ADSL2
ITU G.992.4
splitterless ADSL2
1.5 Mbit/s
0.5 Mbit/s

It just finished approval in 2007. Which isps in nz offer this and will the splitting just be done at the telephone exchange?

I checked my router and I cannot find 992.4 support but I do have adsl2 multi mode so would this mean my router can support splitterless adsl2?

I know the speeds are slower but maybe it will have less dropouts.

P.S
Does any nz isp support RE ADSL2 as it extends the range of broadband from 4km to 7 kilometers?

If you're having drop outs then you're probably best to ask for interleaving to be enabled - I had continuous drop outs when I was down in Christchurch but as soon as I got interleaving enabled everything worked beautifully.

"When the people are being beaten with a stick, they are not much happier if it is called 'the People's Stick'"

Ragnor

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#410316 28-Nov-2010 01:00

Yeah interleaving will correct errors on crappy lines, however the big downside is the large latency increase.

matisyahu

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#410318 28-Nov-2010 01:47

Ragnor: Yeah interleaving will correct errors on crappy lines, however the big downside is the large latency increase.

Disconnections or latency? I think I'll take latency instead :) Things are improving gradually - going by the Telecom Wholesale information by the end of 2011 hopefully the cabinetisation will improve things so all I can suggest is hold out for another 12months or so.

"When the people are being beaten with a stick, they are not much happier if it is called 'the People's Stick'"

sbiddle

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#410323 28-Nov-2010 07:33

And dropouts and poor connections are more often than not caused by dodgy internal house wiring. It's an issue that the vast majority of people overlook when they start blaming their ISP for poor speeds or performance, and yet line quality is the single most important factor.

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Ragnor

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#410521 29-Nov-2010 00:03

sbiddle: And dropouts and poor connections are more often than not caused by dodgy internal house wiring. It's an issue that the vast majority of people overlook when they start blaming their ISP for poor speeds or performance, and yet line quality is the single most important factor.

This ^

Fix your house wiring (proper master splitter install) and you might be pleasantly surprised.

richms

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#410523 29-Nov-2010 00:14

I still dont think that chorus should do anything for poor speeds or disconnects till the internal wiring has being done with proper cable and a central splitter. THey must waste loads of time on faults that are nothing to do with them, and the techs never seem to put it down as that so that the customers are not charged for the callouts.

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#410547 29-Nov-2010 07:58

sbiddle: And dropouts and poor connections are more often than not caused by dodgy internal house wiring. It's an issue that the vast majority of people overlook when they start blaming their ISP for poor speeds or performance, and yet line quality is the single most important factor.

Blaming everything on dodgy internal wiring sounds too convenient. How many faults end up as poor connections in pillars or either end of the drop lead?

freitasm

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#410550 29-Nov-2010 08:08

Bung:
sbiddle: And dropouts and poor connections are more often than not caused by dodgy internal house wiring. It's an issue that the vast majority of people overlook when they start blaming their ISP for poor speeds or performance, and yet line quality is the single most important factor.

Blaming everything on dodgy internal wiring sounds too convenient. How many faults end up as poor connections in pillars or either end of the drop lead?

Not *all* fault are internal wiring, but from what we have seen the majority are. Once the owner's checked the wiring and nothing is found then external factors should be investigated.

Calling the ISP to check things, to just find out it's an internal wiring problem just adds to the cost of providing the service.

sbiddle

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#410556 29-Nov-2010 08:52

Bung:
sbiddle: And dropouts and poor connections are more often than not caused by dodgy internal house wiring. It's an issue that the vast majority of people overlook when they start blaming their ISP for poor speeds or performance, and yet line quality is the single most important factor.

Blaming everything on dodgy internal wiring sounds too convenient. How many faults end up as poor connections in pillars or either end of the drop lead?

I've been told this figure but don't recall it. I do know that wiring faults within a house are significantly greater than within other parts of the network.

Also factor in that if you don't have a master ADSL splitter you will receive slower speeds using plug in filters, this is also inherently a wiring issue within the house. While nobody knows exact figures it's safe to say that somewhere in the vicinity of 75% of ADSL users receive less than their optimum possible speeds because of internal wiring issues within their house and/or lack of master splitters. There are still plenty of people out there who have been cabinetised suffering with sync speeds way under 10Mbps when in reality they could potentially be getting double this.

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#410840 29-Nov-2010 19:56

Bung:
sbiddle: And dropouts and poor connections are more often than not caused by dodgy internal house wiring. It's an issue that the vast majority of people overlook when they start blaming their ISP for poor speeds or performance, and yet line quality is the single most important factor.

Blaming everything on dodgy internal wiring sounds too convenient. How many faults end up as poor connections in pillars or either end of the drop lead?

Its not just old houses either, there is plenty of dodgy house wiring in brand new houses (I saw a 2 year old house just yesterday, cabinetised and still fluctuating down to 3megs) so why should carriers investigate line-quality faults without a way of eliminating faults on the user side? Even top notch street wiring does not compensate for dodgy house wiring.

Not everything is blamed on house wiring, but I have seen Telecom techs go out multiple times while the customer gets more and more frustrated, only to find eventually that it was their own problem. I suspect that telecom spend way more money on ghost faults than they recover in "no fault found" penalties. Unfortunately most users would rather blame a fault on their provider than spend some money to check their internal wiring and ensure their own side is done properly.

Time to find a new industry!

richms

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#410865 29-Nov-2010 20:33

Thats why I think that telecom should have a demarc with isolation that they install before any alarms and other stuff that customers are told to plug their router into, if its still faulty then customers call between telco visit or replace the router.

If telco arrive and put their router on the test point and its fault free, charge the customer.

Richard rich.ms

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#410913 29-Nov-2010 22:05

richms: Thats why I think that telecom should have a demarc with isolation that they install before any alarms and other stuff that customers are told to plug their router into, if its still faulty then customers call between telco visit or replace the router.

If telco arrive and put their router on the test point and its fault free, charge the customer.

Which is exactly what the Chorus SDP offers. A test point that a customer can connect their device(s) to that is isolated from all other house wiring.

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