My SNR/Attenuation

I'm on a 1Mb/256kbps service and am looking get onto a higher service (8Mb/24Mb). I am just over 2km from the exchange and my router reports the following

Operation Data........Upstream......... Downstream
Noise Margin...........29 dB................5 dB
Attenuation.............46 dB................40 dB

Up Stream ..........288 (Kbps.)
Down Stream .....2272 (Kbps.)

Could my line handle 8Mbps?

You are on a 2Mbps service (your ISP may be limiting you to 1Mbps but you are synced at 2Mbps).

With your current SNR you are unlikely to get any more than that out of a max line however with your attenuation you should be able to get quite a bit faster.

You could potentially improve things by sorting out issues with your wiring - have you tried with your router / modem connected to the test socket INSIDE your BT master (with your extensions disconnected)?

I'll have a look at the wiring but is SNR the same as Noise Margin? I think the two may mean different things. Is my SNR too low (if it is the SNR) for 8mbps?

Are you with Pipex????

I subbed to their 1Mb service and i would sync at 2Mb but only connect at the paid for 1Mb rate...... Pipex and some others back in the IPstream days connected people at the max 2Mb but then limited speeds down to what you paid for their end (in your case 1Mb).

SNR is same as "Noise Margin" - It means Signal to Noise Ratio - they are indeed the same.

As folks have said with those stats, 2Mb/s is all you will get, however if you do test at your master socket and exclude internal cabling (as part of the investigations) and you see in increase in SNR then you could well be on your way to around 4Mb/s

The trouble is you only have 5dB s/n margin on a 2megs connection and the 5dB is more or less the limiting factor. Normally a 40dB attenuation line can sync at 6Megs but this would not be possible with your s/n margin. The next step is to test stats from the special socket inside the master. This will eliminate all internal wiring from the line.