FC interface of network cable

An FC interface network cable uses a Fibre Channel protocol over fiber optic or copper cabling, typically terminated with an FC (Ferrule Connector) for high-speed, reliable data transmission.

Overview of Fibre Channel (FC) Networks

Fibre Channel is a high-speed data transfer protocol primarily used to connect servers to storage systems in Storage Area Networks (SANs). It ensures in-order, lossless delivery of block data and supports data rates from 1 Gbps up to 128 Gbps, depending on the technology generation . FC networks usually form a switched fabric, where multiple switches operate together as a single network, providing redundancy and high throughput . While originally designed for optical fiber, FC can also run over copper cabling .

FC Connectors

The FC connector is a fiber-optic connector with a threaded, round metal body designed for secure connections in high-vibration environments . Key features include:

• Ferrule Diameter: 2.5 mm, typically made of zirconia ceramic or stainless steel .
• Polish Types: FC/PC (Physical Contact), FC/SPC (Super Physical Contact), FC/UPC (Ultra Physical Contact) for low insertion loss and minimal back-reflection .
• Locking Mechanism: Screw-threaded design prevents rotation and ensures a stable connection .
• Applications: Datacom, telecommunications, measurement equipment, single-mode lasers, and SANs . FC connectors are gradually being replaced by SC and LC connectors in modern data centers due to faster connection speeds and simpler push-pull designs, but FC remains valued for ruggedness and reliability in critical environments .

FC Interface Cables

FC interface cables are typically single-mode or multi-mode fiber optic cables that connect FC ports on servers, storage arrays, and switches. They are designed to:

• Support high-speed data transfer with minimal signal loss.
• Maintain low insertion loss and low back-reflection for reliable communication.
• Be compatible with Fibre Channel Protocol (FCP) for transporting SCSI commands or other upper-level protocols like FICON for mainframes .

Summary

An FC interface network cable combines the Fibre Channel protocol with a fiber optic cable terminated by an FC connector, providing a secure, high-speed, and low-loss connection for storage networks and telecom applications. While newer connectors like SC and LC are more common today, FC connectors are still used where mechanical stability and vibration resistance are critical .