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Specifications and Models of Tail Fiber Channels

Article Overview

Tail fiber channels are pre-terminated fiber optic cables used to connect optical networks, available in single-mode and multimode types with various core counts and connector interfaces.

Types of Tail Fibers

Tail fibers are classified primarily by mode type and core count:

  • Single-mode (SM): Typically yellow, operating at 1310nm or 1550nm, with long transmission distances ranging from 10 km to 40 km. Ideal for long-haul and high-bandwidth applications .
  • Multimode (MM): Usually orange, operating at 850nm, with shorter transmission distances around 500 meters, suitable for LANs and data centers . Core counts vary depending on network requirements, including single-core, 4-core, 6-core, 8-core, 12-core, 24-core, and higher, allowing for multiple simultaneous connections .

Functions

Tail fibers serve as connectivity bridges between optical cables and network equipment. They are fused to bare fibers in optical cables to establish seamless connections. The fiber head connects to transceivers, patch panels, or optical distribution frames (ODFs), enabling integration with Fibre Channel or other optical systems .

Common Connector Interfaces

Tail fibers come with various connector types to match equipment and network standards:

  • SC/PC: Square connector, widely used in telecom and LAN applications.
  • FC/PC: Circular connector, often used in Fibre Channel systems.
  • LC/PC: Small form factor, common in high-density applications.
  • E2000/APC: Angled physical contact, used in high-performance networks.
  • ST/PC: Bayonet-style connector, legacy applications .

Typical Tail Fiber Models

Tail fibers are often described by their connector combination:

  • FC-SC: Circular to square, connecting ODF boxes to equipment ports.
  • FC-FC: Circular to circular, used for inter-rack jumpers.
  • SC-SC: Square to square, for interconnecting optical boards.
  • SC-LC: Square to snap-in LC connector, used in Huawei OSN and ZTE S series devices.
  • LC-LC: Internal connections between wavelength division devices, less common .

Specifications

  • Cable diameter: Typically 0.9mm tight-buffered for easy fusion and protection .
  • Polish types: UPC (Ultra Physical Contact) or APC (Angled Physical Contact) for low insertion loss and return loss.
  • Fiber types: OS2 for single-mode, OM3/OM4 for multimode high-speed networks .
  • Applications: CATV, FTTH/FTTX, LAN/WAN, data centers, and telecommunication networks .

Integration with Fibre Channel Systems

Tail fibers are compatible with Fibre Channel (FC) networks, which follow standards defined by ANSI X3T11 and INCITS/Fibre Channel committees. These standards specify physical variants, interfaces, and interconnection schemes, ensuring interoperability between tail fibers, transceivers, and FC switches or storage devices . Tail fiber selection depends on network speed, distance, and connector compatibility, making them essential components in high-performance optical and Fibre Channel infrastructures.

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Specifications and Models of Tail Fiber Channels [PDF]

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