Data leased line is a data transm♣¶ission service that uses optical fiber,​φ digital microwave, and open circuits,≈‌"" and uses a digital trans©λ εmission channel to transmitΩ¥ digital signals. It can provide po×♣int-to-point and point₩π-to-multipoint transparent trans&βmission of data leased α₹circuits for users to tra€δ≥♥nsmit data, images, Informati' ≈on such as voice provides circuit tra↔₹₽nsmission services wit₩✔↕h a variety of rates from✘¥↕↕ 2Mbps to 2.5Gbps, and is generally use∞αd in intra-enterprise intranet networki✔≈ng.

Line classification:

Data lines can be diviλ→σ✘ded into local data lines, long-dista≥‌♠nce lines, and international long-∏∞βdistance lines according to geograph♥ ±₩ical areas.

According to the line typ∏≤≥e, there are DDN, Frame Relay ↓•♠×(FR), ATM, SDH, MSTP→​✔₽, Ethernet dedicated line, MPLS-VPNσ₩γ, etc.