What are the two ends of a fiber optic patch cord called

The two ends of a fiber optic patch cord are called connectors, and a fiber with a connector on only one end is called a pigtail. A fiber optic patch cord is a cable terminated with connectors at both ends, allowing it to connect optical devices such as transceivers, switches, or patch panels directly without splicing. Each end typically has a standardized connector type, such as LC, SC, ST, or MPO, depending on the application and equipment compatibility.

These connectors ensure precise alignment of the fiber cores for efficient light transmission. If a fiber has a connector on only one end, it is referred to as a pigtail, which is usually spliced to a fiber in a network or patch panel. In contrast, a fully terminated patch cord with connectors on both ends is ready for plug-and-play use, making it ideal for short-distance connections within data centers, telecom networks, or FTTH installations.

The choice of connector type and fiber mode (single-mode or multi-mode) affects performance, distance, and compatibility. Single-mode fibers typically use yellow jackets and are suited for long-distance communication, while multi-mode fibers use orange or aqua jackets for shorter intra-building or campus links. In summary, the two ends of a fiber optic patch cord are both connectors, and the term pigtail applies when only one end is connectorized.

This distinction is important for network design, installation, and maintenance.