cancel
Showing results for 
Search instead for 
Did you mean: 
dombullion
Aspiring Expert
247 Views
Message 1 of 6

Noise on the Line

Hi All,

 

Here are my line stats from the Hub 3

 

ADSL Line Status

Connection information
Line state:Connected
Connection time:0 day, 00:36:28
Downstream:3,744 Kbps
Upstream:448 Kbps

  ADSL settings
VPI/VCI:0/38
Type:PPPoA
Modulation:G.992.1 Annex A
Latency type:Interleaved
Noise margin (Down/Up):9.6 dB / 24.0 dB
Line attenuation (Down/Up):36.5 dB / 22.0 dB
Output power (Down/Up):19.8 dBm / 11.9 dBm
FEC Events (Down/Up):182 / 0
CRC Events (Down/Up):9 / 0
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
HEC Errors (Down/Up):51 / 0
Error Seconds (Local/Remote):

0 / 0

My question is the noise margin and line attenuation right for my line. I live in the middle of no where pretty much and The line length is about 3.5 KM to the exchange. 

Hope someone can help. All I want to really check is that I am getting the maximum possible speed my line can handle. 

Thank you and Happy New Year 🙂

 

0 Ratings
Reply
5 REPLIES 5
Guru
243 Views
Message 2 of 6

Re: Noise on the Line

It could be a tad faster if it was 6db margin, but 9db is acceptible and loop loss is typical. Happy New Year.
0 Ratings
Reply
dombullion
Aspiring Expert
236 Views
Message 3 of 6

Re: Noise on the Line

Can I ask what exactly loop loss is please.

Also can the margin be reset or changed so the speed goes faster.

Thanks. 

0 Ratings
Reply
Guru
231 Views
Message 4 of 6

Re: Noise on the Line

It's your line attenuation .... its distance erosion from the exchange ... it's length.

 

 

I could give you the "purist" view, that at 36.5 db loop loss, you should have around IP 6.5M at target margin with excellent bitloading and running fastpath.

 

What that means is everything is perfect .... and rarely happens with line adaptive DSL.

 

So yours is on interleave, normal for some line errors, it's at 9db margin, so you lose a little more linespeed.

And if bitloading is average as well .... it all adds up .... BUT

 

What you can do, and I noticed you had a shortish runtime which meant you reset the router in darkness ....

Is do ONE reset in daylight hours tomorrow between 9 and 12, and your sync speed may improve, and then wait for the IP profile to come up to it .... that takes 72 hours.

 

Try that first .... see what happens, if you want to get the margin down to 6db, read about noise margins and line noise .... and how to get rid of it. 

 

See what tomorrow brings ....  😉

0 Ratings
Reply
dombullion
Aspiring Expert
219 Views
Message 5 of 6

Re: Noise on the Line

OK,

I shall do that tommorrow and see what happens. you say I should have an IP profile of 6.5. My IP Profile according to the BT Speedtester is around 3.0 MB.

Thanks. 

0 Ratings
Reply
Distinguished Sage
Distinguished Sage
215 Views
Message 6 of 6

Re: Noise on the Line

your profile is determined by your connection speed which stats show to be 3744 hence profile is only 3mb.  if you can get noise margin down and connection speed up then your profile will increase



If you like a post, or want to say thanks for a helpful answer, please click on the Ratings 'Thumbs up' on left hand side.
If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.
0 Ratings
Reply