The fiber optic cable uses an FC interface

FC (Ferrule Connector) fiber optic cables use a threaded, high-precision connector ideal for single-mode fibers in high-vibration environments.Overview of FC ConnectorsThe FC connector is a fiber optic connector featuring a threaded body designed to provide a secure connection, especially in environments subject to vibration or movement . Originally called the "Field Assembly Connector," it was developed by NTT in the late 1970s and is also known as Ferrule Core Connector or "Fiber Channel" . The connector uses a 2.5 mm ferrule, typically made of zirconia ceramic or stainless steel, which holds the fiber end and ensures precise alignment .Structure and PolishingFC connectors are designed with a screw-on mechanism and an alignment key to prevent fiber rotation during mating . The fiber tip is polished to a physical contact (PC), super PC (SPC), or ultra PC (UPC) finish, which reduces insertion loss and back-reflection . The spring-loaded ferrule ensures consistent contact force when the connector is screwed into the receptacle.ApplicationsFC connectors are commonly used in:Datacom and telecommunications networksMeasurement equipmentSingle-mode lasersHigh-speed storage area networks (SANs) Although FC connectors were widely used historically, they are gradually being replaced by SC and LC connectors, which offer faster connection and higher port density while maintaining similar performance .Advantages and ConsiderationsSecure connection: Threaded design prevents accidental disconnection.Low insertion loss: Typically below 0.5 dB for single-mode fibers .Durable: Suitable for high-vibration or precision applications.Ease of maintenance: Requires careful alignment and cleaning to avoid Fresnel reflection and dust contamination .Comparison with Other ConnectorsCompared to SC and LC connectors, FC connectors are:Larger and screw-based, making them less suitable for high-density racks.More precise for single-mode fibers, offering stable performance in sensitive applications.Slower to connect/disconnect due to the threaded mechanism . FC fiber optic cables remain a reliable choice for applications where connection stability and low signal loss are critical, even though modern networks often favor smaller, push-pull connectors for convenience and density.