New Orcon VDSL speed is only 60% of line rate...

Forums › 2degrees (including Slingshot, Orcon, Flip, Stuff Fibre, MyRepublic, 2talk and Vocus) › New Orcon VDSL speed is only 60% of line rate...

bruizerbg

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#138795 16-Jan-2014 20:11

I have this week been connected to the new Orcon VDSL service. Had a great Chorus tech install - very easy and clean. Tested with Chorus provisioning when first plugged in at 47 Mb download and 10Mb upload. I am 3 days into the provisioning period (DLM, etc) amd I am very happy with the line rate the modem sees (improved to 50mbps down, 10mbps up). However, when I do a Speedtest with the Orcon site I am only seeing 28mbps download (but I am seeing close to 10mbps upload).
So I am a bit confused as to why I can see the 10 upload but not close to the 50mb download. Orcon Tier 1 tells me that the DLM / DSLAM will adjust the rate over the provisioning period if the line will support it.
But why can't I have close to the download rate that the modem can see? Is this just about how the DLM is programmed? Am I being greedy? Or will it improve?
Have the latest snapshot of the x-dsl stats page from my Netcomm modem below.

I am testing directly connected to the modem using ethernet cable from an Nvidia N-Force Gigabit onboard network adapter. But my wireless devices give the same download result. If anyone could comment for me that would be great. Especially if there is something you think I could check or test to improve it.

Regards,
Bruizer

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Geekzone

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#968456 16-Jan-2014 20:11

Hello... Our robot found some keywords in your post, so here is an automated reply with some important things to note regarding broadband speeds.

If you are posting regarding DSL speeds please check that

- you have reset your modem and router

- your PC (or other PCs in your LAN) is not downloading large files when you are testing

- you are not being throttled by your ISP due to going over the monthly cap

- your tests are always done on an ethernet connection to the router - do not use wireless for testing

- you read this topic and follow the instructions there.

Make sure you provide information for other users to help you. If you have not already done it, please EDIT your post and add this now:

- Your ISP and plan

- Type of connection (ADSL, ADSL2, VDSL)

- Your modem DSL stats (do not worry about posting Speedtest, we need sync rate, attenuation and noise margin)

- Your general location (or street)

- If you are rural or urban

- If you know your connection is to an exchange, cabinet or conklin

- If your connection is to a ULL or wholesale service

- If you have done an isolation test as per the link above

Most of the problems with speed are likely to be related to internal wiring issues. Read this discussion to find out more about this. Your ISP is not intentionally slowing you down today (unless you are on a managed plan). Also if this is the school holidays it's likely you will notice slower than usual speed due to more users online.

A master splitter is required for VDSL2 and in most cases will improve speeds on DSL connections. Regular disconnections can be a monitored alarm or a set top box trying to connect. If there's an alarm connected to your line even if you don't have an alarm contract it may still try to connect so it's worth checking.

I recommend you read these two blog posts:

- Is your premises phone wiring impacting your broadband performance? (very technical)

- Are you receiving a substandard ULL ADSL2+ connection from your ISP?

I am the Geekzone Robot and I am here to help. I am from the Internet. I do not interact. Do not expect other replies from me.

freitasm

BDFL - Memuneh
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#968466 16-Jan-2014 20:17

- Where are the server you're downloading from located?
- Are you seeing this speed in a single stream download over HTTP or FTP?
- Are you seeing this speed over WiFi or ethernet?

eXDee

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#968467 16-Jan-2014 20:19

For anyone without good eyesight or a zoom, the actual sync rate is 45054

Jase2985

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#968468 16-Jan-2014 20:20

that only says you are connected at 45/10

have you tried other speed test sites?

bruizerbg

12 posts

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#968469 16-Jan-2014 20:20

Hi Mauricio,
I am using the speedtest.orcon.net.nz page, so unsure of the server location. Have to assume this is Orcon in Auckland.
It is an http download through a web browser (chrome).
This is an ethernet test (but gives the same result over Wireless N

Regards,
Bruce

bruizerbg

12 posts

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#968471 16-Jan-2014 20:21

Hi Jase - can you recommend some? I frequently use speedtest.net - what else?

Jase2985

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#968472 16-Jan-2014 20:22

https://www.speedtest.net/

try different ones from there, ie telecom/Vodafone/different parts of NZ

well give a more accurate indication of where the "problem" lies

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bruizerbg

12 posts

Geek

#968473 16-Jan-2014 20:23

Yes - sorry - Attainable rate above is 50. 45 it is, but that still doesn't explain the 28 vs 45 difference, which is what I am aiming to fix.

Regards,
Bruce

bruizerbg

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#968474 16-Jan-2014 20:25

https://www.speedtest.net/my-result/3235311126

Jase2985

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#968475 16-Jan-2014 20:29

try different servers like vodafone/telecom/world exchange and also different locations in nz

bruizerbg

12 posts

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#968477 16-Jan-2014 20:39

Hosted by TELECOM Auckland

Hosted by Vodafone Auckland

Hosted by TELECOM Wellington

danielsiva

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#968479 16-Jan-2014 20:45

bruizerbg: Hi Mauricio,
I am using the speedtest.orcon.net.nz page, so unsure of the server location. Have to assume this is Orcon in Auckland.

Yes, http://speedtest.orcon.net.nz/ is within the Orcon network, and in Auckland. It should give you the best (highest) result.

FireEngine

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#968488 16-Jan-2014 20:55

Well firstly you won't see line rate as a download speed number (and they are in different units).

This is no different to ADSL, typical for ADSL is 70-80% of the line rate number as a downstream data rate (assuming good upstream). This is because line rate isn't transmitting data, its just the line frequency. Once you start transmitting data packets will need retransmitting due to natural, unavoidable errors. Once you need retransmitting the upstream becomes important as those retransmit requests need to be sent up the line. This is why a saturated upload reduces your download speed.

Now the faster you go, the more natural errors you will get, all things being equal. So to run VDSL I'd expect the proportional data payload on the line to be less than ADSL at the faster line speeds VDSL runs at. So 60% vs the 70-80% on ADSL, maybe.

Its a bit like saying you can do a journey by Ferrari vs Corolla, one will be undoubtedly be faster just as surely as the other will use less fuel.

There are various other sensitivities that VDSL has vs ADSL (for instance it peak data rate is attainable over a smaller distance range to ADSL, all things being equal). This is why it has mandatory Full Install and rollback if the tech finds a speed greater than ADSL can't be obtained.

Regards FireEngine

bruizerbg

12 posts

Geek

#968498 16-Jan-2014 21:00

Thanks FireEngine - therefore the only way that it might improve is if the DLM decides it will change my profile from 8a to 17a - yes? Over which I have no control...

Cbfd

307 posts

Ultimate Geek

#968503 16-Jan-2014 21:24

Have you tried downloading a file or a torrent and see what your lines downloads at

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