Structured Cabling System Design Considerations


English: Nettech Class on Structured Cabling i...
English: Nettech Class on Structured Cabling in progress (Photo credit: Wikipedia)

Structured Cabling System (SCS) is a set of cabling and connectivity products that integrates various data, voice, video, and various other networking management systems of a building. SCS consists of a number of standardized elements, open architecture, and standard connection interfaces. SCS is a complete system of cabling and related hardware, which provides a comprehensive networking system. This has wide range of uses, such as providing business phone systems or transmitting data over a computer network. The structured cabling system starts at the particular point where the service provider terminates. This point is referred to as the point of demarcation or Network Interface Device.

There are generally six major structured cabling system components. These are building entrance, equipment room, telecommunications closet, backbone cabling, horizontal cabling and work area. These are also known as subsystems.


Building Entrance: Building entrance requirement specification is for the point at which the cable enters a building. The specification includes recommendation for type of connection and surge protection devices. Entrance facility includes cabling, connecting hardware, network demarcation point or points, protection devices and other equipment which connect to the access provider and/or network cable. This also includes connection between the inside of the building and the outside.

Equipment Room: Networking equipment rooms generally house equipment of higher complexity compared to telecommunication closets. Almost all the functions of a telecommunications closet are provided by an equipment room. It may be any secure storage area in which the cables, communication racks, servers, switches, routers and other expensive hardware devices are located. An equipment room must always be locked in order to prevent theft of equipment as well as data security and also restrict unauthorized access.


Racks of telecommunications equipment in part ...
Racks of telecommunications equipment in part of a data center. (Photo credit: Wikipedia)

Backbone Cabling: Backbone cabling is one which runs vertically between the floors or between the equipment rooms. This provides interconnection between the building entrance sites, equipment rooms, including Cat5 or Cat6 cables and terminators. This includes vertical connection between floors, cables between an equipment room and building cable entrance facilities and cables between buildings. The term backbone depicts the cable handling major network traffic. There are two types of backbone cabling. One is the inter building and other is the intra building.


Telecommunications Closet:  Telecommunications closet is that area inside a building which mounts the telecommunications cabling system. It includes mechanical terminations and cross connects for horizontal as well as backbone cabling system. It may also include the MC or IC for various portions of backbone cabling system. Telecommunications closet also provides a controlled environment to the telecommunication equipment and connecting hardware. Using Telecommunications closet is for specific implementation.

Horizontal cabling: Horizontal cabling is the physical media which runs at the work station outlet to the termination point in the equipment room.

Horizontal cabling system extends from work area telecommunications outlet to the telecommunications closet and includes horizontal cable, jumpers, mechanical terminations and patch cords which are located in TR or TE. This may also incorporate multi user telecommunications outlet assemblies and consolidation points. Often, horizontal cables are routed directly from the closet to the work station without any cable junctures, splices or taps. This reduces the chance of faulty connections and electrical noise to a great extent.

Work area: The work area component extends from the telecommunications outlet to the work station equipment. Work area wiring is designed in such a way that it is relatively simple so that interconnection, addition and changes can be managed easily. At least two telecommunications outlets have to be provided for each work area. The work area includes the following components:
a.Station equipments, data terminals, computers, telephones etc.
b.Patch chords, PC adapters, fibre jumpers, etc

About The Author

Michelle Patterson is an avid technology blogger and writes extensively about IP/VoIP and Unified Communication. She works with some leading companies to understand the trends of these modern communication technologies.

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