Here's some clues: 1.
What speeds are T1/T3, etc. for LW, & also 2.
More on LW connection speeds, & then 3.
What is a T1?
To find your speed, close LW & Choose nearest location for a speed test & only have your browser open:
http://www.t1shopper.com/tools/speedtest/
If the result is quoted in kbps (kilobits per second) then you'll need to divide it by 8 to give you KB/s (KiloBytes per second)!