When talking about direct attach cables, we may come across breakout cable, such as Cisco QSFP+ breakout cable. There are many kinds of breakout cables, and they are suitable for various applications. For example, a Cisco QSFP-4SFP10G-CU5M compatible QSFP+ to 4 SFP+ passive direct attach copper breakout cable, as shown below, connects to a 40G QSFP+ port of a Cisco switch on one end and to four 10G SFP+ ports of a Cisco switch on the other end, and is used for very short distances and offers a very cost-effective way to connect within racks and across adjacent racks. Other than copper breakout cable, there is also fiber breakout cable. What is fiber breakout cable? How much do you know about fiber breakout cable? In this post, a brief introduction to fiber breakout cable will be given.
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Introduction to Fiber Breakout Cable
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Fiberstore White Paper | Introduction to Fiber Breakout Cable 1
When talking about direct attach cables, we may come across breakout cable, such as Cisco QSFP+
breakout cable. There are many kinds of breakout cables, and they are suitable for various
applications. For example, a Cisco QSFP-4SFP10G-CU5M compatible QSFP+ to 4 SFP+ passive direct
attach copper breakout cable, as shown below, connects to a 40G QSFP+ port of a Cisco switch on
one end and to four 10G SFP+ ports of a Cisco switch on the other end, and is used for very short
distances and offers a very cost-effective way to connect within racks and across adjacent racks.
Other than copper breakout cable, there is also fiber breakout cable. What is fiber breakout cable?
How much do you know about fiber breakout cable? In this post, a brief introduction to fiber
breakout cable will be given.
What Is Fiber Breakout Cable?
Breakout-style fiber optic cable, also called fiber breakout cable or fiber fan-out cable, is an optical
cable which contains several jacketed simplex optical fibers package together inside an outer jacket.
It differs from a distribution-style cable, in which tight-buffered fibers are bundled together, with
only the outer cable jacket of the cable protecting them. The design of breakout-style cable adds
strength for ruggedized drops, however the cable is larger and more expensive than
distribution-style cable. The structure of fiber breakout cable (shown as the figure below) ensures a
long life. A fiber breakout cable consists of outer jacket, tap binder, breakout fiber assembly
(tight-buffered fiber surrounded in aramid yarns and jacketed), strength member, and ripcord. For
Introduction to Fiber
Breakout Cable
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Fiberstore White Paper | Introduction to Fiber Breakout Cable 2
easier handling, it also features an easily strippable 900µm coating. Both the PVC and plenum
cables are rated for fire safety.
Features of Fiber Breakout Cable
The key purpose of fiber breakout cable is that one can "break out" several fibers at any
location, routing other fibers elsewhere.
Each numbered fiber sub unit is protected by a layer of aramid yarn and encased in a
FRNC/LSNH jacket. The individual sub units are cabled and then jacketed with a flame resistant
FRNC/LSNH compound. Each fiber uses either the tight buffer technology or semi-tight buffer
technology for excellent fiber stripping.
Each fiber of a breakout cable has its own jacket and aramid strength elements, so each fiber is
extremely strong and rugged.
Fiber breakout cable is available in a variety of designs that will accommodate the topology
requirements found in rugged environments. Fiber counts from simplex to 256 are available.
A tight buffer design is used along with individual strength members for each fiber. This permits
direct fiber cable termination without using breakout kits or splice panels.
Due to the increased strength of Kevlar members, fiber breakout cables are heavier and larger
than the telecom types with equal fiber counts.
A fiber breakout cable offers a rugged cable design for shorter network designs. This may
include LANs, data communications, video systems, and process control environments.
Advantages of Fiber Breakout Cable
Fiber breakout cable is extremely versatile and suitable for use in riser and plenum indoor
applications. You can use it in backbone and horizontal runs.
Each fiber is individually reinforced, so you can divide a breakout cable into individual fiber lines,
which enables quick connector termination and eliminates the need for patch panels.
Fiber breakout cable can be more economical because it requires much less labor to terminate.
You may want to choose a cable that has more fibers than you actually need in case of breakage
during termination or for future expansion.
Fiber breakout cable offers advantages over standard patch cords because it eliminates the
need for a fiber-optic ducting system.
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Fiberstore White Paper | Introduction to Fiber Breakout Cable 3
Applications of Fiber Breakout Cable
Fiber breakout cables are typically used for indoor applications, between an optical distribution
frame and an electronic equipment rack, or between two electronic equipment racks. These cables
are particularly effective when equipment racks are distributed over a large area (for example
several floors in a large building). The end of the breakout cable behaves like a standard single
pigtail. The outer jacket of the cable can be stripped. Fiber breakout cables are used to carry optical
fibers that will have direct termination to the equipment, rather than being connected to a patch
panel. Covered with an outer jacket, these cables are ideal for routing in exposed trays or any
application requiring an extra rugged cable that can be directly connected to the equipment. And
they are also suitable for pre-terminated cable assemblies.
Conclusion
Fiber breakout cables are ideal for installations requiring an extremely rugged and reliable cable
design where maximum mechanical and environmental protection are necessary. And fiber
breakout cables have many obvious advantages, such as cost savings, direct termination to sub
cable, which eliminates the need for patch panels and patch cords and reduces connector loss, and
easy installation and high crush resistance.
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Fiberstore White Paper | Introduction to Fiber Breakout Cable 4
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Notice: This document is for informational purposes only and does not set forth any warranty, expressed or
implied, concerning any equipment, equipment features, or service offered or to be offered by Fiberstore.
Fiberstore reserves the right to make changes to this document at any time, without notice, and assumes no
responsibility for its use. This information document describes features that may not be currently available.
Contact a Fiberstore sales team for information on feature and product availability.
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