Help with line stats and "guestimate" MAX speed

[chris_87]

I'm not too clued up on the line stats and such although I have picked up a few things from reading on the net. We currently have a 1MB ADSL connection and are looking at going on MAX depending on the amount of "extra" speed we may be able to get.

The line stats are (at present):

SNR [D/U]: 24.0 23.0
Atten [D/U]: 55.0 31.5
Pwr [D/U]: 17.6 11.8
Max (Kbps) [D/U]: 4832 1024
Rate (Kbsp) [D/U]: 1152 288

With the SNR (down) generally ranging from 23.0 to 27.0 and the Max (attainable rate I take it?) from the value shown up to ~5400. Although what confuses me is that putting the stats into some checkers gives an estimate of 3.5-4.1 (is that throughput or sync?) whilst the Max figure (which I guess would be attainable rate if on MAX) giving throughput between 4.0-4.5.

However, the wonderful BT Checker gives for the house post code:

According to BT Wholesale, your line should be able to support a 3Mbps or greater ADSL connection via ADSL Max.

Standard ADSL RAG results:
You cannot receive 2Mbps ADSL
You may be able to receive 1Mbps ADSL
You can receive 512Kbps ADSL
You can receive 256Kbps ADSL

Yet for our number:

According to BT Wholesale, your line should be able to support a 2Mbps or greater ADSL connection.

Standard ADSL RAG results:
You can receive 2Mbps ADSL
You can receive 1Mbps ADSL
You can receive 512Kbps ADSL
You can receive 256Kbps ADSL

I know that a telephone number check is supposed to be more accurate (although before having 1MB ADSL which was before MAX, our number gave the same results as our postcode). Surely if we can get 2Mbps ADSL we should be able to get more than 2Mbps via ADSL MAX?

Any help is much appreciated (we're looking at ADSL24 btw).

 

[csmager]

The 4Mb+ max figure is the very limit - BT peg the SNR at 6dB to add some sort of safety net. I'd go with the figure you were given from the online checker - ~3.5-4Mb. Sounds about right. It's all guesswork till you actually try though.

 

[tolien]

The fixed rate speeds you can get aren't completely connected to what you can get on Max - the former's based on your attenuation, the latter's nearer the real world.
From the stats you've posted, you wouldn't normally be expected to get home2000, but you'd get a good bit more on Max.

 

[chris_87]

From the stats you've posted, you wouldn't normally be expected to get home2000, but you'd get a good bit more on Max.

From looking at the "limit" for 2mb I know, which is why I find it strange that the BT checker says we can get it (again, before getting 1mb it said 2mb wasn't possible and 1mb may require an engineer). If I could hopefully expect to get around 2.5-3.0 throughput then we'll take the "risk" and go for MAX, as we can't really see a reason to get MAX if all we are going to get is a possible 2mb (and most likely slightly higher pings due to interleaving).

 

[CurlyWhirly]

From looking at the "limit" for 2mb I know, which is why I find it strange that the BT checker says we can get it (again, before getting 1mb it said 2mb wasn't possible and 1mb may require an engineer). If I could hopefully expect to get around 2.5-3.0 throughput then we'll take the "risk" and go for MAX, as we can't really see a reason to get MAX if all we are going to get is a possible 2mb (and most likely slightly higher pings due to interleaving).

I have the same attenuation as you (55 dB) and I get a sync rate of 3.5 - 4 Mb on Max giving me speeds of between 3 and 3.5 Mb so I would say go for it

 

[marmalade]

Notall adsl Routers are the same. Get a router such as the Thomson Speedtouch (Broadcom chipset) and you may get better than antisipated - I have 8000/768 with ukonline. YET Ican't do that with a Billion.