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.

mcb



13 posts

Geek


Topic # 113878 30-Jan-2013 19:03 Send private message

Hello
can you help me understand how the data from my ADSL2 modem (telecom thomson 585v7 - on xtra) makes sense alongside the speedtest results i get. Basically the way i read it, the dsl connection rate is too slow for the speedtest results i'm getting to be possible:

DSL Connection 
  • Uptime:               0 days, 0:38:11
  • DSL Type:            G.992.5 annex A
  • Bandwidth (Up/Down) [kbps/kbps]:           945 / 12.283
  • Data Transferred (Sent/Received) [kB/kB]:             0,00 / 0,00
  • Output Power (Up/Down) [dBm]:               12,0 / 19,5
  • Line Attenuation (Up/Down) [dB]:              13,0 / 24,0
  • SN Margin (Up/Down) [dB]:          15,0 / 12,5
  • Vendor ID (Local/Remote):           TMMB / BDCM
  • Loss of Framing (Local/Remote): 0 / 0
  • Loss of Signal (Local/Remote):     0 / 0
  • Loss of Power (Local/Remote):    0 / 0
  • Loss of Link (Remote):     0
  • Error Seconds (Local/Remote):    0 / 0
  • FEC Errors (Up/Down):    0 / 2
  • CRC Errors (Up/Down):   0 / 0
  • HEC Errors (Up/Down):   699 / 0

I assume that means its connected at 945 kbps upstream and 12.28 kbps downstream - but I must be  wrong as my speedtest today is:
  • Ping: 44ms
  • Download speed: 10.59Mbps
  • Upload speed: 0.77Mbps.
so:
1. can you help me understand the modem's up/down bandwidth figures.
2. I assume the HEC and FEC errors may reflect a sometimes scratchy line... correct? should i be worried?

The context here is  we're getting slow-downs and I want to make sure its not our wiring. I'm about to put CAT5e cable in from the master filter to the modem, as currently its old phone cable with a join in it. I want to measure any differences before and after the work. We're in mt eden (Auckland), the attenuation rate suggests 1.7km from the exchange whereas google says its 1.2km to walk, and i'd say less to fly. we're in a hole between cabinets on chorus's SAT map.

Thanks for any help you can offer

Mike

Create new topic
1745 posts

Uber Geek
+1 received by user: 338

Trusted
Spark NZ

  Reply # 753443 30-Jan-2013 19:22 Send private message

If you email Mr your home phone number to pl at telecom dot co dot nz I can post your line test results or just email them back to you if you prefer. If you've got a properly installed master filter you should be gettiing around 16-18 with your attenuation rate. But the graphs out of the network analyzer tell a far better story.




I work for Spark, but as always my views are my own.

2699 posts

Uber Geek
+1 received by user: 399


  Reply # 753446 30-Jan-2013 19:29 Send private message

The 12.28 kbps downstream will actually be 12.28 Mb/s, which would be consistent with your speedtest. Probably just a typo in the modem's interface.

Will be interesting to see what the line analyzer comes back with to see if that sync rate could be improved.

510 posts

Ultimate Geek
+1 received by user: 16


  Reply # 753448 30-Jan-2013 19:34 Send private message

> * Bandwidth (Up/Down) [kbps/kbps]:           945 / 12.283

Thomson are a French company aren't they?

So they use a decimal comma instead of a decimal point... and what looks like a decimal point is used as the thousands separator.
http://en.wikipedia.org/wiki/Decimal_mark

In which case, in most English speaking countries the above would be:

* Bandwidth (Up/Down):           945 kbps / 12,283 kbps






#include <standard.disclaimer>

mcb



13 posts

Geek


  Reply # 753456 30-Jan-2013 19:52 Send private message

Runningman and Alexx - between the 2 of you, you must be right. that's lateral thinking alexx!

plambrechtsen - thanks I'll email you my info now.





16486 posts

Uber Geek
+1 received by user: 1398

Trusted
Vodafone NZ

  Reply # 753463 30-Jan-2013 20:19 Send private message

I swapped out one of these thomson 585v7 modems for a better quality and the speed doubled at my sisters place and WIFI was better




2029 posts

Uber Geek
+1 received by user: 333

Subscriber

  Reply # 753467 30-Jan-2013 20:35 Send private message

I get your speed with 30dB attenuation.

Check line cords. Try different modem. Install splitter (Coffeebaron will do this in Auckland/Waikato) or disconnect all other jacks - and before you say it, it doesn't matter if there is nothing plugged in to the other ones. The wire is still their and causes issues. If things don't improve THEN call your ISP and get them to get Chorus out.

1745 posts

Uber Geek
+1 received by user: 338

Trusted
Spark NZ

  Reply # 753490 30-Jan-2013 21:18 Send private message

So here are some of your stats.  And first read some good info about ADSL here: http://www.internode.on.net/residential/adsl_broadband/easy_broadband/performance/

DELT estimated distance 1.44 km

To me what's particularly telling is the upper ranges from 300-500 that's where your drop off in speed is coming from.

Then the other view of your bitloading as a graph.



It shouldn't be dropping to zero bits at 500, it should still be well above 6.

Lastly the SNR graph.



This is the last indicator, the big dip after 360 or so. then it tapers off to nothing...

If I was to guess (and again it's my guess so don't hold me to it :) what you "could" get.. I would say ~18mb range would sound about right to me.

In short... Either contact the Broadband Helpdesk on 0800 225598 and ask for a Master Filter to be installed, or you could contact CoffeeBaron aka Fraser here on Geekzone.




I work for Spark, but as always my views are my own.

mcb



13 posts

Geek


  Reply # 753494 30-Jan-2013 21:32 Send private message

plambrechtsen - thanks for your tests and analysis. unfortunately i can't load the graphs... not sure why??? any chance you could load them again?

i'm guessing from your comments you are summing its my house wiring...

i have a master filter installed, tho i've found one old 3-wire socket in the house and i'll check if the alarm is wired after the filter.  I've also half a roll of cat5e so i'll renew the setup over the weekend. after that, i'm guessing if my modem attenuation and bandwidth speeds improve i'll have found a cause. if not i'll call in the experts.

cheers

Mike

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:

Speed limit when overtaking? Teach me please.
Created by nakedmolerat, last reply by lxsw20 on 25-Oct-2014 00:04 (72 replies)
Pages... 3 4 5


Neon - Sky's new streaming service
Created by JarrodM, last reply by Ronin on 24-Oct-2014 22:40 (19 replies)
Pages... 2


House Auctions
Created by t0ny, last reply by mattwnz on 25-Oct-2014 00:18 (36 replies)
Pages... 2 3


Spark Socialiser
Created by freitasm, last reply by freitasm on 22-Oct-2014 18:39 (34 replies)
Pages... 2 3


VDSL, which router/modem sub $200?
Created by TeaLeaf, last reply by TeaLeaf on 24-Oct-2014 23:26 (16 replies)
Pages... 2


30 too old to get into IT?
Created by Interslice, last reply by shk292 on 24-Oct-2014 20:39 (16 replies)
Pages... 2


American legal jurisdiction in New Zealand
Created by ajobbins, last reply by gzt on 21-Oct-2014 14:58 (30 replies)
Pages... 2


iPad Air 2 and iPad Mini 3. Gonna get one?
Created by Dingbatt, last reply by Geektastic on 24-Oct-2014 23:11 (108 replies)
Pages... 6 7 8



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.