New router - which one to go for?

[benjo plz.]

Sorry to be a pain

It'll be the speed you're connecting at. Having a 1m line is al well and good, but you won't connect at 1m.

and none of that funny stuff with big and little m's Tolien .

 

[tolien]

It's because you're trying to feed it "25.5 dB" instead of just the values, and two attenuation values (with characters in between) instead of one...

Put in 1152, 56.0 and 25.5, and it works...

A crude estimate of what your line is capable of is 6693kbps (kilo bits per second).

and none of that funny stuff with big and little m's Tolien .

1 millisomethings? millicubits per fortnight?

 

[CurlyWhirly]

It's because you're trying to feed it "25.5 dB" instead of just the values, and two attenuation values (with characters in between) instead of one...

I did leave out the dB bit afterwards but I entered both the attentuation values so this is probably what caused the error so I will have another try.

Cheers.

 

[benjo plz.]

Put in 1152

1 millisomethings? millicubits per fortnight?

where'd you get the 1152 from?

don't start that again.

 

[tolien]

where'd you get the 1152 from?

1Mbps sync rate on BT Wholesale == 1152 kbps. Ta da.

Get your units right, and no room for urine extraction?

 

[CurlyWhirly]

and none of that funny stuff with big and little m's Tolien .

I know I'm always doing it

Having a 1m line is al well and good, but you won't connect at 1m.

Do you mean because it doesn't take overheads into account?
When I run ADSL Guide's broadband test I usually get around 950 kbit which isn't bad for a 1 mbit line I assume?

Put in 1152, 56.0 and 25.5, and it works...

Thanks now I know where I went wrong!
My excuse was I never used that line checker before so I didn't know how to enter the info correctly.

A crude estimate of what your line is capable of is 6693kbps (kilo bits per second)

Crikey that's way higher than BT's figures which say that I can't even get 2 mbit let alone 6 mbit

 

[tolien]

Do you mean because it doesn't take overheads into account?

No, because "1Mbps" isn't your sync rate - 1152 kbps is. To work out your maximum sync rate, you need your current one.

When I run ADSL Guide's broadband test I usually get around 950 kbit which isn't bad for a 1 mbit line I assume?

Yes, it isn't bad.

Crikey that's way higher than BT's figures which say that I can't even get 2 mbit let alone 6 mbit

Because they're guesstimating based on your attenuation, not your SNR margin. Note that it is crude - the only answer's what you get when it's enabled.

 

[CurlyWhirly]

Because they're guesstimating based on your attenuation, not your SNR margin. Note that it is crude - the only answer's what you get when it's enabled.

Thanks tolien.
You seem to really know your stuff

I will now check out the sticky threads for more info on exactly what these terms mean.

 

[CurlyWhirly]

My new router has just arrived but before I connect it up can someone please explain the difference between line rate and data rate (or sync rate I think it is also known as)?




I'm just curious as to why the line rate is higher in both instances of download and upload speed
I thought that the data rate already allowed for 'overheads'.

Thanks

 

[benjo plz.]

I thought that the data rate already allowed for 'overheads'.

It does. Thats why the Line rate is greater than the data rate, as (simplisticaly) the line rate is the data rate + overheads.

 

[tolien]

My new router has just arrived but before I connect it up can someone please explain the difference between line rate and data rate (or sync rate I think it is also known as)?

The sync rate is what that modem's calling the "data rate" (which includes an ATM overhead on top of the 1000 kibps of TCP/IP throughput), the line rate looks like its guess at what your line can do (or it's just jibberish, ignore it).