T3 line, or DS3 line, is a fast digital connection that transfers large volumes of data. Medical facilities, data centers, ISPs, and other organizations transmit data with T3 lines.

T1 Lines vs. T3 Lines

How T3 Works

T3 lines consist of 672 channels interweaved using time division multiplexing (TDM), each running at 64 Kbps. In the initial stage, T3 runs as four T1, which are multiplexed to form the T2 line. The T3 line is formed by an M13 multiplexing seven T2 lines. Each of these channels runs at 64 Kbps to achieve an overall speed of 42.924 Mbps.

T3 Lines Use Cases