What type of line is a typical dedicated fiber optic cable

Singlemode duplex fiber optic cables are typically used for dedicated lines due to their long-distance capability and high bandwidth performance.Recommended Fiber TypeFor dedicated lines, singlemode fiber (SMF) is the preferred choice because it supports long-distance transmission with minimal signal loss and high data rates, making it ideal for point-to-point connections between buildings or data centers . Singlemode fibers have a small core diameter (around 8–10 µm) that allows light to travel straight through the fiber, reducing dispersion and enabling distances of 10 km or more without repeaters .Fiber ConfigurationDuplex fiber cables are standard for dedicated lines, containing two separate strands: one for transmitting and one for receiving signals. This configuration ensures full-duplex communication, which is essential for stable, high-speed data transfer . Simplex cables, with only one fiber strand, are generally used for bidirectional transceivers or single-direction links, but duplex is preferred for most dedicated line applications .Cable Jacket and EnvironmentThe choice of cable jacket depends on the installation environment:Outdoor-rated jackets: UV-resistant and water-blocking, suitable for aerial or underground installations.Plenum-rated jackets: Fire-resistant and low smoke, required for air-handling spaces indoors.Riser-rated jackets: Suitable for vertical runs between floors in buildings . Selecting the correct jacket ensures durability and compliance with safety standards.SummaryFor a dedicated line, the optimal fiber optic cable is a singlemode duplex cable with an appropriate jacket for the installation environment. This combination provides high bandwidth, long-distance capability, and reliable full-duplex communication, making it the standard choice for telecommunications, enterprise networks, and data center interconnects .