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Can i get the upgrade to 1mb?

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Can i get the upgrade to 1mb?

Hi, for ages ive had problems with my BB and only recently had my disconnection problem sorted out. Well mostly sorted out.

Anyways heres the numbers. Using this data can you determine if i can get a 1mb line?

Noise margin : up 19 ** Down 3.8 ( its usually higher ( 7-9dBs but wether seems to affect it for some reason.. Bt eningeer says water is likely the noise in a duct somewhere or a bad line)
attenuation up 31 ** Down 64

best wishes

dave
3 REPLIES
Community Veteran
Posts: 14,469
Registered: 30-07-2007

Can i get the upgrade to 1mb?

They are no good for 1Mb. Your SNR is so bad I'm surprised anything is working.
N/A

Can i get the upgrade to 1mb?

okay so at a strecth what should they be for 1mb?
Community Veteran
Posts: 14,469
Registered: 30-07-2007

Can i get the upgrade to 1mb?

1Mb requires a downstream line attenuation of 60dB or lower. All speeds need a SNR (noise margin) of 10dB or higher for reliable operation. If your SNR goes below 7dB disconnections are almost guaranteed.

You may not think 4dB for line attenuation is much, but it actually represents a halving of the power levels you get at 60dB and is very significant.

See ADSL: Understanding Line Loss and measurements