What term refers to dedicated digital telephone lines with much greater bandwidth than ISDN lines?

The term that refers to dedicated digital telephone lines with much greater bandwidth than ISDN lines is T Carriers. T Carrier systems, such as T1 and T3 lines, are designed to transport many voice and data signals simultaneously. They provide a significant increase in bandwidth capacity compared to ISDN lines, allowing for higher data rates suitable for businesses needing reliable and fast communication channels.

T1 lines, for example, can carry up to 1.544 Mbps, while T3 lines can handle up to 45 Mbps. This substantial bandwidth makes T Carriers particularly advantageous for organizations that require stable connections for internet access, video conferencing, and other high-demand applications.

While fiber optic lines do provide immense bandwidth and speed, they are a different type of technology not specifically defined as T Carriers. Copper lines typically refer to traditional telephone lines that offer much lower bandwidth, and digital subscriber lines (DSL) are a type of technology that utilizes existing copper infrastructure but does not approach the bandwidth offered by T Carriers. Therefore, T Carriers are distinctly recognized for their dedicated lines and superior bandwidth compared to ISDN.