Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.
Buying anything on Amazon? Please use the Geekzone Amazon aff link.




275 posts

Ultimate Geek
+1 received by user: 11

Trusted
Subscriber

Topic # 112584 13-Dec-2012 10:39 Send private message

Speed Comparison: VDSL vs ADSL

TrueNet compared the two broadband options available to 90% of New Zealanders to find out how different they are.  The performance of each is compared by speed in both directions over November 2012.

VDSL

We report Upload and Download speeds this month comparing performance with distance, between the DSLAM and the probe, for each of our VDSL probes.  

VDSL results show that for one connection, upload speed is faster than download speed.  This may be due to wireline electrical interference, but is more likely to be due to poor quality home wiring.  

Note that VDSL probe 555 is known to have new ethernet premises wiring, and has the fastest upload performance despite being 900m from the DSLAM.   

Recommendation - get your premises wiring updated before spending on Fibre or VDSL. 

VDSL upload speeds vary between 6Mb/s and 11Mb/s, compare that with ADSL, which has upload speeds between 0.6Mb/s and 1.1Mb/s.  ie VDSL upload speed is 10 times faster than ADSL. 

Note the scales on both sides of the charts when comparing VDSL with ADSL. 

ADSL

To plot the ADSL performance in a way which provides scales suitable for our chart, we have limited the probes in this comparison to Telecom only.  Telecom has more rural customers than other ISPs, so some very long lines are included which provides interesting comparisons as the probes are ordered by distance between DSLAM and probe. ADSL probe performance reduces when the probe is more than 1km from the DSLAM, and reduces more severely beyond 2km.  VDSL is restricted to a limit of about 1km from the DSLAM, but shows no signs of performance reduction over this distance - ie upload speed and download speed appear to be independent of distance.  

VDSL the Preferred Choice in Speed Comparison

VDSL is shown to be very much better than ADSL for both Upload and Download speeds for the same locations.  However, VDSL while able to be supplied by all ISPs, is limited to a few suppliers.   Note: Just two of the five ISPs featured in the TrueNet chart above have significant numbers of probe volunteers.
Our VDSL chart above demonstrates that speeds are independent of distance to the 1km maximum of our probes.  The restriction of a 1km limit for VDSL connections should be reconsidered based on TrueNet results.  Longer cable distances for VDSL are able to provide a far superior performance to that of ADSL. 

Glossary 
Details on how we measure are avalable on our Technical page 

Speed - Throughput or the peak speed achieved during our standard test downloading an image from our test servers 

Webpage Download - TrueNet maintains a Standard Testpage which is used for measuring the time to download the entire page.  This page is visible here, we use a copy located on our test servers for test downloads. 

ISPs - TrueNet has probes measuring almost 20 ISPs but only reports on those where there are 5 or more probes working during any particular month. 

ADSL, VDSL, DSL - the standard broadband service provided over a telephone line,  VDSL is a faster version than ADSL.  They use similar technology and backhaul, so sometimes DSL is used when referring to both. 

Unlimited - A service where there is no monthly limit on the amount of data used.  Specifications for this service include that it may be "Managed" and have "performance reductions applied during peak demand periods". 

DSLAM - the exchange or cabinet based equipment that your modem is connected to, over the pair of copper wires that are exclusively allocated to your premises. 

Ethernet - The wiring used to connect computers to a network, typically an Ethernet cable is coloured blue, with small square connectors at each end.




www.truenet.co.nz

We are seeking more volunteers here :-)

Create new topic
5307 posts

Uber Geek
+1 received by user: 804


  Reply # 731880 13-Dec-2012 10:46 Send private message

cool. thanks John.

Looks like roughly half the people on VDSL are getting download speeds no better then they could expect from ADSL (based on distance), so for them it is really only the upload speed that makes a difference.

803 posts

Ultimate Geek
+1 received by user: 44

Subscriber

  Reply # 731890 13-Dec-2012 10:57 Send private message

You sure about probe 504 being on vdsl?



275 posts

Ultimate Geek
+1 received by user: 11

Trusted
Subscriber

  Reply # 731899 13-Dec-2012 11:03 Send private message

Yes, checked with volunteer. Also suggested they contact their ISP to find out if their connection is set to ADSL after they check their own Modem.

This is typical of the issues our volunteers face, so is likely typical of the rest of the market.




www.truenet.co.nz

We are seeking more volunteers here :-)

20111 posts

Uber Geek
+1 received by user: 1691

Moderator
Trusted
Biddle Corp
Subscriber

  Reply # 731933 13-Dec-2012 11:29 Send private message

Any chance of gathering information from the users to indicate whether their VDSL2 was a professional install or a DIY? It would be interesting to be able to look at the probe #'s above and be able to see what the quality of their internal wiring is.

The simple reality is if you don't eliminate stubs with a master filter or removing all other jackpoints you're going to receive a substandard connection with VDSL2.
 

2092 posts

Uber Geek
+1 received by user: 359

Subscriber

  Reply # 731941 13-Dec-2012 11:40 Send private message

Can we find out what our probe number is from the site?

Edit: And, also very surprised by the low speeds people are seeing on VDSL. I have only done maybe 5 or 6  VDSL installs but haven't seen speeds under 40Mb yet.

4005 posts

Uber Geek
+1 received by user: 189

Trusted
Subscriber

  Reply # 731954 13-Dec-2012 11:55 Send private message

Wow, that's a great upload speed even 1 km from the cabinet. I could really do with faster upload so I wonder whether I can get an install done...



275 posts

Ultimate Geek
+1 received by user: 11

Trusted
Subscriber

  Reply # 732293 13-Dec-2012 22:22 Send private message

@Chevrolux - "Can we find out what our probe number is from the site?"

Yes, you can see it on your "Connections" tab under your profile




www.truenet.co.nz

We are seeking more volunteers here :-)



275 posts

Ultimate Geek
+1 received by user: 11

Trusted
Subscriber

  Reply # 732299 13-Dec-2012 22:30 Send private message

@sbiddle - "Any chance of gathering information from the users to indicate whether their VDSL2 was a professional install or a DIY? It would be interesting to be able to look at the probe #'s above and be able to see what the quality of their internal wiring is. " That's possible but expensive, it would require a survey.

"The simple reality is if you don't eliminate stubs with a master filter or removing all other jackpoints you're going to receive a substandard connection with VDSL2." Sort of true, but only if you use a POTs telephone or indeed use "jackpoints" My connection has neither a master filter, nor a POTs phone, nor even a first "Jackpoint" - reminds me of the old days when we only had a single phone and planned the rollout of Jackpoints for the first time LOL

My home-office probe is 555 and the instal was by an electrician, following his training and using his tools - the correct ones. I only specified the ethernet hub concept using many PDL 2 x ethernet sockets in a row.




www.truenet.co.nz

We are seeking more volunteers here :-)

2092 posts

Uber Geek
+1 received by user: 359

Subscriber

  Reply # 732324 13-Dec-2012 23:25 Send private message

JohnButt:
"The simple reality is if you don't eliminate stubs with a master filter or removing all other jackpoints you're going to receive a substandard connection with VDSL2." Sort of true, but only if you use a POTs telephone or indeed use "jackpoints" My connection has neither a master filter, nor a POTs phone, nor even a first "Jackpoint" -


That is the best case scenario which I think is what sbiddle is saying should be the scenario with all VDSL installs. But the large majority are done like ADSL where 'self install' is the norm. There will be loads of them running on wiring with multiple jacks in different configurations, old half corroded joints and probably even analogue phones plugged through ADSL plug-in filters.

20111 posts

Uber Geek
+1 received by user: 1691

Moderator
Trusted
Biddle Corp
Subscriber

  Reply # 732359 14-Dec-2012 06:17 Send private message

JohnButt: @sbiddle - "Any chance of gathering information from the users to indicate whether their VDSL2 was a professional install or a DIY? It would be interesting to be able to look at the probe #'s above and be able to see what the quality of their internal wiring is. " That's possible but expensive, it would require a survey.

"The simple reality is if you don't eliminate stubs with a master filter or removing all other jackpoints you're going to receive a substandard connection with VDSL2." Sort of true, but only if you use a POTs telephone or indeed use "jackpoints" My connection has neither a master filter, nor a POTs phone, nor even a first "Jackpoint" - reminds me of the old days when we only had a single phone and planned the rollout of Jackpoints for the first time LOL

My home-office probe is 555 and the instal was by an electrician, following his training and using his tools - the correct ones. I only specified the ethernet hub concept using many PDL 2 x ethernet sockets in a row.


And in many ways your install bacsk up my view - you have a professionally installed connection and are seeing great (for the distance) results, whereas there are others who aren't seeing these results.

A single bridge tap will kill VDSL2 entirey, I've even hdd dealings with this recently where Chorus didn't perform a full install correctly and left a second jackpoint in place at a premises. The Chorus ISAM stats showed very clearly on the line graphs what was happening.

Create new topic




Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





Trending now »

Hot discussions in our forums right now:

My un-consented UFB install
Created by thurthur, last reply by mdooher on 28-Nov-2014 11:54 (77 replies)
Pages... 4 5 6


Gigatown winner town and plans
Created by freitasm, last reply by Demeter on 28-Nov-2014 08:59 (76 replies)
Pages... 4 5 6


Click Monday Deals
Created by mrtoken, last reply by Krishant007 on 24-Nov-2014 17:11 (25 replies)
Pages... 2


Seen any good Black Friday / Cyber Monday deals?
Created by Jaxson, last reply by ckc on 28-Nov-2014 15:08 (24 replies)
Pages... 2


This is the end ...
Created by joker97, last reply by hangon on 28-Nov-2014 14:42 (47 replies)
Pages... 2 3 4


Gull Employment Dispute.
Created by networkn, last reply by dickytim on 28-Nov-2014 15:32 (151 replies)
Pages... 9 10 11


Stuff.co.nz hacked by Syrian electronic army?
Created by surfisup1000, last reply by dclegg on 28-Nov-2014 13:35 (17 replies)
Pages... 2


The Warehouse pulling R18 games and DVD's
Created by semigeek, last reply by Geektastic on 27-Nov-2014 18:32 (64 replies)
Pages... 3 4 5



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.