Data leased line is a data transmission service that uses optical fiber, digital microwave, and open circuits, and uses a digital transmission channel to transmit digital signals. It can provide point-to-point and point-to-multipoint transparent transmission of data leased circuits for users to transmit data, images, Information such as voice provides circuit transmission services with a variety of rates from 2Mbps to 2.5Gbps, and is generally used in intra-enterprise intranet networking.

Line classification:

Data lines can be divided into local data lines, long-distance lines, and international long-distance lines according to geographical areas.

According to the line type, there are DDN, Frame Relay (FR), ATM, SDH, MSTP, Ethernet dedicated line, MPLS-VPN, etc.