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.


polglase

261 posts

Ultimate Geek

Trusted

#84609 3-Jun-2011 11:28
Send private message

Hi,

I've just upgraded the router at my kids school and we have the following stats from the connection:


Trained Mode:            G.992.5 (ADSL2+) Annex A

TC Mode:                 ATM

Selftest Result:         0x00

DELT configuration:      disabled

DELT state:              not running

Trellis:                 ON                       ON

Line Attenuation:        13.0 dB                  6.9 dB

Signal Attenuation:      13.0 dB                  6.5 dB

Noise Margin:            15.0 dB                 16.7 dB

Attainable Rate:        18780 kbits/s            945 kbits/s

Actual Power:            19.0 dBm                12.2 dBm



DS Channel1     DS Channel0   US Channel1       US Channel0

Speed (kbps):             0            15378             0               945



They are having speed issues with National Standards testing and I'm trying to extract everything we can from the connection. Any suggestions for optimisation or comments on the stats appreciated.

Also would like an estimation of VDSL2 connection rates given the line stats above.

Thanks,
Jonathan 

 

Create new topic
Ragnor
8035 posts

Uber Geek

Trusted

  #477366 3-Jun-2011 11:44
Send private message

Connection stats look fine, 13dB attenuation is approximately 1km of copper from the cabinet/exchange to you.

Your issue could be an ISP issue or just general saturation of your upload bandwidth, you are not going to get much higher real world upload than your current rate on ADSL2+.

Do you have a firewall/gateway doing outbound traffic management or prioritisation?  If not you should.

What ISP are you using eg: Telecom SchoolZone, Slingshot/Callplus, Watchdog, other?

The Telecom Wholesale service target for VDSL2 is 40Mbit/s down and 8-10Mbit/s up but you need signal attenuation lower than 10dB last time I checked.  VDSL2 over Telecom Wholesale isn't being offered by many ISP's yet.

It's possible your wiring could be looked at you may be able to achieve below 10dB attenuation with some work.

What area/location are you in?  Check exchange/cabinet details on:
http://www.telecomwholesale.co.nz/maps  

Telstrclear also offer VDSL2 off their own equipment to businesses and schools but their coverage area is limited.  You'd probably need to contact them for details.

webwat
2021 posts

Uber Geek

Trusted

  #477751 4-Jun-2011 14:54
Send private message

With 13dB downstream attenuation you will not get an improvement with VDSL2. Your upstream at 945 kbits/s might have room for an extra 50kbit or so, check the quality of the school's internal wiring on that line. We don't have Annex M in NZ yet, so thats probably the only way to improve it.

Like Ragnor said, upstream traffic shaping could make a big difference. Or you could investigate the expensive SHDSL business-grade plans.




Time to find a new industry!


 
 
 
 


polglase

261 posts

Ultimate Geek

Trusted

  #478498 7-Jun-2011 12:31
Send private message

Ragnor: Connection stats look fine, 13dB attenuation is approximately 1km of copper from the cabinet/exchange to you.

Your issue could be an ISP issue or just general saturation of your upload bandwidth, you are not going to get much higher real world upload than your current rate on ADSL2+.

Do you have a firewall/gateway doing outbound traffic management or prioritisation?  If not you should.

What ISP are you using eg: Telecom SchoolZone, Slingshot/Callplus, Watchdog, other?

The Telecom Wholesale service target for VDSL2 is 40Mbit/s down and 8-10Mbit/s up but you need signal attenuation lower than 10dB last time I checked.  VDSL2 over Telecom Wholesale isn't being offered by many ISP's yet.

It's possible your wiring could be looked at you may be able to achieve below 10dB attenuation with some work.

What area/location are you in?  Check exchange/cabinet details on:
http://www.telecomwholesale.co.nz/maps  

Telstrclear also offer VDSL2 off their own equipment to businesses and schools but their coverage area is limited.  You'd probably need to contact them for details.


Hi Ragnor,

Thanks for the feedback. The next step is to implement a firewall/gateway upgrade, at the moment we are looking for the raw bandwidth they need for the e-asTTle testing.

They are currently with Vodafone, if we can get the required performance from ADSL2+ we will recommend a move to Kuranet from Snap as it seems to be the best deal for schools.

I thought VDSL2 at 1km offered better speeds than ADSL2+? Are you saying that is not the case? Which profile are Chorus using do you know?

According to the maps they are connected to MAB/Z which is due to get VDSL2 this month. I have checked with Telstraclear and they don't offer the service in this area.

Cheers,
Jonathan
 

polglase

261 posts

Ultimate Geek

Trusted

  #478500 7-Jun-2011 12:34
Send private message

webwat: With 13dB downstream attenuation you will not get an improvement with VDSL2. Your upstream at 945 kbits/s might have room for an extra 50kbit or so, check the quality of the school's internal wiring on that line. We don't have Annex M in NZ yet, so thats probably the only way to improve it.

Like Ragnor said, upstream traffic shaping could make a big difference. Or you could investigate the expensive SHDSL business-grade plans.


The school's budget doesn't stretch to the more expensive options. As I mentioned to Ragnor i thought that at 1km VDSL2 did offer an improvement. To get an answer I suspect we would need to know the profile that Chorus use as this seems to determine the falloff rate. 

xpd

xpd
Im a pirate
10740 posts

Uber Geek

Mod Emeritus
Trusted
Lifetime subscriber

  #478508 7-Jun-2011 12:46
Send private message

Is the school eligible for the KAREN network ?
http://karen.net.nz/home/




XPD^ / DemiseNZ

 

Blog         Free Games        Twitter

 

My TradeMe Goodies

 

Disclaimer - It wasn't me, the dog ate my keyboard, my account was hacked, I was drunk, ALIENS.

 

I Twitch occasionally and take part in Folding@Home


wjw

wjw
162 posts

Master Geek


  #478518 7-Jun-2011 13:02
Send private message

xpd: Is the school eligible for the KAREN network ?
http://karen.net.nz/home/


Kuranet gives Karen access. For schools the barrier for entry for a dicrect Karen connection is usually too high. 

polglase

261 posts

Ultimate Geek

Trusted

  #478521 7-Jun-2011 13:05
Send private message

wjw:
xpd: Is the school eligible for the KAREN network ?
http://karen.net.nz/home/


Kuranet gives Karen access. For schools the barrier for entry for a dicrect Karen connection is usually too high. 


Agreed, the school does not have the budget for a fibre connection, plus Karen fees on top of existing internet costs. 

Create new topic




News »

Amazon introduces new Echo devices
Posted 25-Sep-2020 11:56


Mad Catz introduces new S.T.R.I.K.E. 13 Mechanical Gaming Keyboard
Posted 25-Sep-2020 11:34


Vodafone NZ upgrades international submarine network
Posted 25-Sep-2020 09:09


Jabra announces wireless noise-cancelling airbuds, upgrade existing model
Posted 24-Sep-2020 14:43


Nokia 3.4 to be available in New Zealand
Posted 24-Sep-2020 14:34


HP announces new HP ENVY laptops aimed at content creators
Posted 24-Sep-2020 14:02


Logitech introduce MX Anywhere 3
Posted 21-Sep-2020 21:17


Countdown unveils contactless shopping with new Scan&Go tech
Posted 21-Sep-2020 09:48


HP unveils new innovations for businesses adapting to rapidly evolving workstyles and workforces
Posted 17-Sep-2020 15:36


GoPro launches new HERO9 Black camera
Posted 17-Sep-2020 09:45


Telecommunications industry launches new 5G Facts website
Posted 17-Sep-2020 07:56


New Zealand ranks 3rd in world in GSMA index
Posted 15-Sep-2020 10:13


Trend Micro Security Suite adds web monitoring to prevent identity theft
Posted 14-Sep-2020 15:37


NVIDIA to acquire Arm for US$ 40 billion
Posted 14-Sep-2020 12:27


Epson launches its next gen A3+ colour EcoTank multi-function printer
Posted 10-Sep-2020 16:08



Geekzone Live »

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


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



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.