A T-1 line, consists of 24 channels; a channel is like a phone line with a bandwidth of 64k. And a full T-1 line can run data at a speed of 1.5Mbps. The major benefit for businesses in using T-1 lines is that multiple users can share data without getting held up in a long wait. And one of the smartest features of a T-1 line is that businesses can order a partial line or split the line into voice and data. For example, a business can take 12 of the 24 channels in a T-1 line and use them for internet connections. This business can then use the remaining 12 channels for voice. The T-1 line setup allows businesses to use the 24 lines for any combination of services.

T-1 lines are becoming an extremely popular offering by phone companies. Telephone companies currently use T-1 lines to provide a PRI, which allows companies to make and receive calls at extremely discounted rates. Many small companies take a portion of the PRI line and use it for internet access, which is a tremendous cost benefit.