Just for the record T1 and T3 are telephony designations for a type of data circuit provisioning. (in Fiber they are DS-1 and DS-3) These are generally used by organizations as opposed to home users.

- A T-1 has a speed of appx 1.5 megabits per second (Mbps)
- A T-3 has a speed of Appc 45 (Mbps)
- A 56k modem is 56 kilobits per second (Kbps)
- DSL ranges (Download) from 256 (Kbps) to in certain situations 9 Mbps
- Cable modems also range (Download) 256 Kbps up to 10 Mbps.

In the case of Cable & DSL the speed has a lot to do with the ISP, how well the ISP manage their network, and how much they want to throttle their customers speed (based on provisioning).

Really big circuits use Fiber and have classifications of OC-x where an OC-3 is (appx) 155 Mbps, an OC-6 is twice that and so on... well ito the Gigabit per second area.

I think the speed setting in Limewire is meant to allow other users to determine connection speed (based upon a given users honesty) and allow Limewire to set certain thresholds internally based upon the users' internet connection. (# of connections for one)

All of the numbers are from memory but they are reasonably close to the actual thing. (memory is not as good as it once was)