Breakout, fanout and harness cables are used to distribute fibres from high-density trunk cables to individual connections or active interfaces. They enable direct fan-out from multi-fibre connectors such as MPO to duplex or single-fibre terminations using LC or modern VSFF connectors like SN or MDC. Pre-terminated on both ends, these cables reduce the need for additional patch or split elements, minimize attenuation and support both parallel-optics and duplex-based architectures in structured data center cabling.