If this is done, then the maximum theoretical downstream speed goes back up to around 15 Mbit/s.

The upstream and downstream speeds can be varied by allocating either more or fewer carriers for each purpose.

These technologies have limited downstream speed, thus are less useful except to extend services to the most distant customers.

In May 2008, Tellas upgraded their downstream speed to 24 Mbit/s.

SDSL (symmetric digital subscriber line) - offers identical upstream and downstream speeds, meaning you can upload and download information more quickly.

The meter then compares the difference between the upstream and downstream speeds to calculate the velocity of gas flow.

Offering downstream speeds up to 15Mbit/s.

Basically what this means is that your effective speed is the lower of your upstream and downstream speed.

However, the overall download speed depends on the downstream speed of the user, the upstream speed of the server, and the network between them.

Cable Digital News confirmed the service was, at that time, "the fastest cable wideband tier in the U.S., in terms of downstream speeds."