Data leased line is a dat'↕∑→a transmission service th ‍↑at uses optical fiber, dig‍<®ital microwave, and open circuitλσ€s, and uses a digital trans≤​↔mission channel to tran₹δ¶smit digital signals. It↔​≠ can provide point-to-point and poiλ∞nt-to-multipoint transparent transm¶‍ission of data leased c↔<ircuits for users to transmit  ♥data, images, Informati≈✔₽on such as voice provides circu★±←it transmission servi™₩αces with a variety of rates from 2Mbp≥$s to 2.5Gbps, and is gener "™ ally used in intra-ente©♦rprise intranet network•≥ing.

Line classification:

Data lines can be divide₹'d into local data lines,✔®¶® long-distance lines, and internatλ×ional long-distance lines according ♦✔to geographical areas.

According to the line typ¥£↓ e, there are DDN, Frame R☆‍÷elay (FR), ATM, SDH, MSTP, Ethernet de♠¥≠αdicated line, MPLS-VPN, etc.