cancel
Showing results for 
Search instead for 
Did you mean: 

1

JamesM
Grafter
Posts: 1,103
Registered: ‎24-06-2009

1

Smiley
11 REPLIES 11
Oldjim
Resting Legend
Posts: 38,460
Thanks: 787
Fixes: 63
Registered: ‎15-06-2007

Re: Attenuation dB

Is there a decimal point missing  Grin (11.9 and 19.8 perhaps)
JamesM
Grafter
Posts: 1,103
Registered: ‎24-06-2009

Re: Attenuation dB

Smiley
w23
Pro
Posts: 6,347
Thanks: 96
Fixes: 4
Registered: ‎08-01-2008

Re: Attenuation dB

Most routers have a few glitches (I have tried many and have yet to find one that accurately reports all figures), I think it is a safe bet that a decimal is missing (bear in mind, though, I get nearly 10dB difference between the (downstream) attenuation reported between certain different routers).
You would think that they could get the basics right but they often don't.
You could try checking whether there is a firmware upgrade available, that sometimes corrects errors (and sometimes introduces new ones).
Call me 'w23'
At any given moment in the universe many things happen. Coincidence is a matter of how close these events are in space, time and relationship.
Opinions expressed in forum posts are those of the poster, others may have different views.
MisterW
Superuser
Superuser
Posts: 14,575
Thanks: 5,411
Fixes: 385
Registered: ‎30-07-2007

Re: Attenuation dB

Also the downstream/upstream appear to be reversed, downstream attenuation must be greater than upstream because of the higher frequencies used.

Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.

itsme
Grafter
Posts: 5,924
Thanks: 3
Registered: ‎07-04-2007

Re: Attenuation dB

Quote from: walker23
You would think that they could get the basics right but they often don't.

You expect a lot from a device which is a fraction of the price of decent measuring equipment that would return accurate figures.
WWWombat
Grafter
Posts: 1,412
Thanks: 4
Registered: ‎29-01-2009

Re: Attenuation dB

On a perfectly normal line, a sync rate of 7616 with a noise margin of 7dB would equate to an attenuation figure of around 28-30dB, with the line being around 2000m long. Do you have any idea how long your line is - even the as-the-crow-flies distance could be useful.
My router, a DG834GT had a known problem where the noise margin and attenuation figures were swapped, which got sorted with a firmware upgrade. Not sure that's your problem though...
Plusnet Customer
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.
JamesM
Grafter
Posts: 1,103
Registered: ‎24-06-2009

Re: Attenuation dB

Smiley
jojopillo
Plusnet Alumni (retired)
Plusnet Alumni (retired)
Posts: 9,786
Registered: ‎16-06-2010

Re: Attenuation dB

HI JamesM,
Just ran a line test and your attenuation is 29dB Downstream and 17dB upstream.
Jojo Smiley
Oldjim
Resting Legend
Posts: 38,460
Thanks: 787
Fixes: 63
Registered: ‎15-06-2007

Re: Attenuation dB

Same as the reported output power then  Roll_eyes
JamesM
Grafter
Posts: 1,103
Registered: ‎24-06-2009

Re: Attenuation dB

Smiley
198kHz
Seasoned Hero
Posts: 5,730
Thanks: 2,773
Fixes: 41
Registered: ‎30-07-2008

Re: Attenuation dB

Looks like the reported Attenuation figures are probably actually the Output Power figures, albeit with a missing decimal point, and reversed.
Murphy was an optimist
Zen FTTC 40/10 + Digital Voice   FRITZ!Box 7530
BT technician (Retired)