What is a breakout cable and what does it do?

• A. Copper power cable.
• B. A trunk cable that carries multiple fibers for MPO connectors.
• C. Fan-out harness converting MPO trunk to multiple LC pairs for device ports.
• D. A single fiber path with no split.

Answer: (C)

Breakout cables are fan-out harnesses that split a high-density MPO/MTP trunk into multiple individual duplex fiber links with LC connectors. This lets you take the many fibers carried in a single MPO trunk and connect them to devices that have standard LC duplex ports. For example, a 12-fiber MPO trunk can be breakout into six LC duplex connections, enabling multiple parallel 10 Gb/s channels (or other lane configurations) depending on the transceivers used. The idea is to translate the dense multi-fiber backbone into manageable, plug-and-play connections at the device end. A copper power cable is unrelated, and an MPO trunk describes the main multi-fiber path before breakout, while a single fiber path with no split isn’t a breakout.