What is the name of the fiber optic distribution box s incoming line

The incoming line to a fiber optic distribution box is commonly called the feeder cable or distribution fiber cable.Explanation

In a fiber optic network, the fiber optic distribution box (FDB) serves as an intermediate node that distributes optical signals from the main network to multiple endpoints, such as apartments or homes . The incoming line that enters the distribution box is typically a feeder cable or distribution fiber cable, which carries the optical signal from a central office, fiber distribution hub (FDH), or backbone network .

Function of the Feeder Cable

• Signal Delivery: The feeder cable brings the optical signal into the distribution box for further splitting or distribution.
• Connection to Splitters or Splice Trays: Inside the distribution box, the feeder cable is connected to optical splitters or splice trays, which then route the signal to multiple drop cables leading to individual subscribers .
• Protection and Management: The distribution box provides mechanical support, strain relief, and protection for the feeder cable to prevent bending or damage .

Related Terms

• Drop Cable: The outgoing fiber from the distribution box to the end user.
• Backbone Cable: A higher-capacity fiber that may feed multiple distribution boxes in a larger network.
• Feeder vs. Distribution Fiber: In some contexts, the terms are used interchangeably, but "feeder cable" usually refers to the main line entering the box, while "distribution fiber" may refer to fibers branching out to multiple endpoints . In summary, the incoming line of a fiber optic distribution box is called the feeder cable, which is the primary fiber bringing signals from the network to the distribution point for further routing to subscribers.