What are T1, T3, and OC3 Lines?
High-Speed Network Connections – Each line transmits data at a different rate, calculated in megabits per second (Mbps). OC3 lines, which carry information along the Internet “backbone,” transfer data at 155 Mbps. This is more than three times as fast as a T3 line, which transfers data at 43 Mbps. In comparison, A T3 line can handle as much data per second as 30 T1 lines; a T1 line, at a rate of 1.544 Mbps, transfers data 54 times faster than a 28.8 modem operating at 28,800 bits per second.
