A 44.736 Mbps point-to-point dedicated line that provides 672 64-Kbps voice or data channels. T3 channels are widely used on the Internet.

A connection made up of 28 T1 carriers, used to transmit digital signals on fiber-optic cable at 44.736 megabits per second.T3 can handle 672 voice conversations or one video channel.The T3 line has enough bandwidth to transmit full-motion real-time video, and very large databases over a busy network.A T3 line would be installed as a major networking channel for a large corporation or university with high volume network traffic.