cancel
Showing results for 
Search instead for 
Did you mean: 

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

daviez
Grafter
Posts: 41
Registered: 05-08-2007

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

We are currently on a 1Mb line, with our D-Link router reporting the following:

SNR Margin 28dB downstream, 26dB upstream
Line Attenuation 45dB downstream, 56dB upstream

Any chance of an upgrade to a 2Mb line working? If not, is there anything we can do to improve the levels to support 2Mb?

Thanks in advance.
9 REPLIES
the_norris
Grafter
Posts: 463
Registered: 02-08-2007

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

With the Attenuation reported as 45dB - it just out side the limit for 2Mb. (43dB with ADSL equip connected) Although the router may be reporting this wrong - best to raise a ticket to CS asking for a Whoosh test. This will return a more correct value.

But the SNR is very good.

Things you could try to improve things - plug the router a filter at the master socket. Or fit a face plate to the master socket so the signal is split here into to sockets - ADSL and Phone. Face plates are reported to be better that plugin filters.

Phil
N/A

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

Check here:
www.bt.com/broadband
daviez
Grafter
Posts: 41
Registered: 05-08-2007

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

Had a reply from Plusnet support:

Quote
We do not run whoosh tests to discover if your line can support a higher speed as this would not necessarily confirm that your line was able to support the requested speed.

The only way to 100% confirm this is to make an order and then BT will test the line for suitability, if unsuitable any fee's paid would be refunded.

Please advice how you would like to proceed.
N/A

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

I currently have 2mb
with downstream line attenuation of 56db up 15.5db
Noise margin 12 db down and 25 db up

From reading all this my 2mb connection should not work
But appart from a few weeks at the begining of switch over its been fantastic
Community Veteran
Posts: 2,322
Registered: 01-08-2007

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

If you currently have 2mb with a 56db attenuation and an SNR of 12db, then my figures:

56db (same) and SNR of 24.5db should be good enough tooHuh


I thought it had to be well under 43db attenuation to get a solid 2mb connection?
N/A

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

Quote
I currently have 2mb
with downstream line attenuation of 56db up 15.5db
Noise margin 12 db down and 25 db up

From reading all this my 2mb connection should not work


It shouldn't (on paper).

I guess you've touched lucky with your modem/router - it seems to be performing well above spec..

I wonder what you're running there ..?
N/A

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

Hi I am using a Netgear DG834G all in one.
Appart from a few teething problems when I switched from BT to plusnet ( lots of drop outs) its been fine.
I am 3km away from exchnage aswell!
But these figures are always used with a large safety margin
N/A

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

Same here - loss of 50dB down and I still got a 2mg connection (even thought the checker only said I could have 1meg with an engineer visit) and it is rock solid.
Community Veteran
Posts: 2,322
Registered: 01-08-2007

Upgrade 1Mb to 2Mb - attenuation/SNR etc?

Looks like I may be in luck then - my attenuation has dropped another point to 55 now (guess its due to the weather drying up a little). The SNR is up to 26.5 now too - so looking at other figures who have 2mb I may be in luck - as will a load more people by the sound of it too.

Guess we will all have to wait and see