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.


103 posts

Master Geek


Topic # 59376 4-Apr-2010 09:58
Send private message

Hi im just wondering about line attenuation and how it reflects on your line speed


Thses are the stats from my modem, I want to know if i am getting the appropriate speed





DSL Type:
G.992.5 annex A

Output Power (Up/Down) [dBm]:
12,0 / 19,0

Line Attenuation (Up/Down) [dB]:
12,0 / 23,0

SN Margin (Up/Down) [dB]:
12,0 / 11,5

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 / 0

CRC Errors (Up/Down):
0 / 33

HEC Errors (Up/Down):
79 / 31



 Thanks in advance :)

View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
26468 posts

Uber Geek
+1 received by user: 6021

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  Reply # 314610 4-Apr-2010 10:07
Send private message

What is your sync speed?



103 posts

Master Geek


  Reply # 314619 4-Apr-2010 10:25
Send private message

Bandwidth (Up/Down) [kbps/kbps]:
773 / 10.823


But according to my research I should be getting higher.



 







Enter your Downstream attenuation (dB)



Cable Loss (dB/km) – Default 13.81



Attainable Rate (ADSL1) – kbit/s

8000



Attainable Rate (ADSL2) – kbit/s

19174



Distance to exchange (Meters)

1665










26468 posts

Uber Geek
+1 received by user: 6021

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  Reply # 314633 4-Apr-2010 10:55
Send private message

Do you have a master splitter or plug in filters?

It's very hard to get the maximum ADSL2+ performance with plug in filters, you really need a master splitter. This will also cure any issues because of wiring in your house causing reflections on the line.

If you've got plug in filters remove all of these and all phones and see what ytour results are.






103 posts

Master Geek


  Reply # 314634 4-Apr-2010 10:57
Send private message

plug in filters, 2 filters for 2 phones

Will have a go at what you suggested now 



103 posts

Master Geek


  Reply # 314637 4-Apr-2010 11:06
Send private message

Ok well i did what you said, unplugged all filters and phones





Bandwidth (Up/Down) [kbps/kbps]:
1.041 / 9.828



if anything its syncing slower, but much faster upload



 



103 posts

Master Geek


  Reply # 314638 4-Apr-2010 11:14
Send private message



I plugged 1 of the phones back in, it disconnected my internet, and reconnected back at





Bandwidth (Up/Down) [kbps/kbps]:
769 / 10.271









6171 posts

Uber Geek
+1 received by user: 237

Trusted
Subscriber

  Reply # 314675 4-Apr-2010 14:25
Send private message

When you get unstable and unpredictable results like that its fair to say that line stub effects are crimping your speeds, the only solution is to have a central filter installed.

Assuming you are on a Telecom wholesale connection then at 23dB (1.6km) you can only really expect somewhere between 10-14Mb/s, this is due to the fact that Telecom target a higher working S/N of 12dB rather than 6-7dB as used by other operators, while this reduces your speed it increases your line stability, the maximimum speed you are ever likely to see on a Telecom DSLAM is around 18Mb/s.

Cyril

1348 posts

Uber Geek
+1 received by user: 240

Subscriber

  Reply # 314803 4-Apr-2010 21:18
Send private message

Anbo:

I plugged 1 of the phones back in, it disconnected my internet, and reconnected back at

Bandwidth (Up/Down) [kbps/kbps]:
769 / 10.271


I would go and ask telecom to get the phone check; to only get 10.271kbps, which translates into 1.5KBs, there is deinately something wrong with your connection; I"m surprised you're able to surf the net with such a horribly slow connection. 




Laptop: MacBook Pro (15-inch, 2017)
Desktop: iMac (27-inch, 2017)
Smartphone: iPhone X 256GB 'Space Grey'
Additional devices: Unifi Security Gateway, Unifi Switch, Unifi AP AC HD, Unifi Cloud Key, Apple TV 4K 64GB
Services: iCloud, Lightbox, Spotify, Wordpress

 


42 posts

Geek


  Reply # 314810 4-Apr-2010 21:38
Send private message

I think your maths is wrong

42 posts

Geek


  Reply # 314811 4-Apr-2010 21:41
Send private message

Sorry I should clarify I assume its 10271kbps and not 10

6171 posts

Uber Geek
+1 received by user: 237

Trusted
Subscriber

  Reply # 314814 4-Apr-2010 21:55
Send private message

Actually good point, I had read it in the fist place as 10Mb/s or there abouts, I assume that is the correct interpretation.

Cyril

1348 posts

Uber Geek
+1 received by user: 240

Subscriber

  Reply # 314833 4-Apr-2010 23:07
Send private message

jeffreyh: Sorry I should clarify I assume its 10271kbps and not 10


If that is the case then he is getting at least 1283 KB/s which is pretty damn good, close to 1 MBps.

I'm stuck on around 3,000 kbps, which translates into around 350KBps. 

kbps = kilobits per second
KBps = kilobytes per second 
MBps = megabyte per second 




Laptop: MacBook Pro (15-inch, 2017)
Desktop: iMac (27-inch, 2017)
Smartphone: iPhone X 256GB 'Space Grey'
Additional devices: Unifi Security Gateway, Unifi Switch, Unifi AP AC HD, Unifi Cloud Key, Apple TV 4K 64GB
Services: iCloud, Lightbox, Spotify, Wordpress

 




103 posts

Master Geek


  Reply # 314900 5-Apr-2010 10:38
Send private message

With phones and splitters plugged in

 


Without phones or splitters plugged in

 

6171 posts

Uber Geek
+1 received by user: 237

Trusted
Subscriber

  Reply # 314903 5-Apr-2010 10:42
Send private message

Hi, so your sync speed is infact 10Mb/s, which as I say for a 1.6km line is not far from expected although a on the low side, without doing a full isolation test (which will replicate what you will get with a central) then I cannot comment further.

Typically from experience, with correct wiring I would expect 12-14Mb/s for a 1.5km line but there are things you cannot control like the street wiring, if you are on a high pair feeder with a full DSL packing (ie lots of other DSL users, hence higher background noise) then it can be slightly lower

Also I see you have interleaving off this will pull the speed back from what I would normally expect, so maybe your speed is fine.

Cyril



103 posts

Master Geek


  Reply # 314912 5-Apr-2010 11:10
Send private message

I only got interleaving turned off about 4 days ago, the speeds pretty much the same.

Also im apparently connected directly into the Massey exchange so I don't know if the amount of users would affect my speed

Non interleaving:





From Telecom Wholesale



This address is near an exchange which has already been upgraded with faster broadband equipment (ADSL2+ technology).

Please note that factors such as chosen broadband plan, home or business wiring, and modem type can still affect the broadband performance at this address.

A pre-qualification check is required to determine what broadband services, if any, are available at this address.



Exchange Details
Exchange Area: Massey
Show cabinets within exchange
ADSL2+ Upgrade: Jan 2008


VDSL2 Upgrade: Not yet available 

 1 | 2
View this topic in a long page with up to 500 replies per page 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:





News »

N4L helping TAKA Trust bridge the digital divide for Lower Hutt students
Posted 18-Jun-2018 13:08


Winners Announced for 2018 CIO Awards
Posted 18-Jun-2018 13:03


Logitech Rally sets new standard for USB-connected video conference cameras
Posted 18-Jun-2018 09:27


Russell Stanners steps down as Vodafone NZ CEO
Posted 12-Jun-2018 09:13


Intergen recognised as 2018 Microsoft Country Partner of the Year for New Zealand
Posted 12-Jun-2018 08:00


Finalists Announced For Microsoft NZ Partner Awards
Posted 6-Jun-2018 15:12


Vocus Group and Vodafone announce joint venture to accelerate fibre innovation
Posted 5-Jun-2018 10:52


Kogan.com to launch Kogan Mobile in New Zealand
Posted 4-Jun-2018 14:34


Enable doubles fibre broadband speeds for its most popular wholesale service in Christchurch
Posted 2-Jun-2018 20:07


All or Nothing: New Zealand All Blacks arrives on Amazon Prime Video
Posted 2-Jun-2018 16:21


Innovation Grant, High Tech Awards and new USA office for Kiwi tech company SwipedOn
Posted 1-Jun-2018 20:54


Commerce Commission warns Apple for misleading consumers about their rights
Posted 30-May-2018 13:15


IBM leads Call for Code to use cloud, data, AI, blockchain for natural disaster relief
Posted 25-May-2018 14:12


New FUJIFILM X-T100 aims to do better job than smartphones
Posted 24-May-2018 20:17


Stuff takes 100% ownership of Stuff Fibre
Posted 24-May-2018 19:41



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.