What Are The Six Structured Cabling Subsystems? How It Works

What Are The Six Structured Cabling Subsystems? How It Works

Enterprise Networking Mag | Monday, January 10, 2022

Structured cabling makes it much easier to install a cable infrastructure that can support a wide range of voice and data communications equipment.

FREMONT, CA: The installation, troubleshooting, and maintenance of cable infrastructures are greatly simplified with structured cabling. In addition, this saves money through the standardization of all hardware components and cable types.

Six Structured Cabling Subsystems

Entrance Facilities

Telecom facilities entering a residence or building from the outside -- from a private network or local service carrier -- pass through an opening in the outside wall. This cabling enters an indoor where other devices such as network connection points, hardware connectors, power supplies, patch panels, equipment racks, and protection devices for grounding, shielding, and lightning protection are deployed. 

Equipment Room

The equipment room is where entrance cabling connects to the internal building wiring infrastructure. It houses patch panels that connect backbone cabling, horizontal cabling, and intermediate cabling. This room may also accommodate network switches, servers, PBXs, and other devices. According to equipment vendor specifications, it should be environmentally controlled to maintain relative humidity levels and temperature.

Backbone Cabling

Also called riser cabling, typically installed in vertical channels, or risers, connects to each floor -- backbone cabling links EF, telecommunications, other ERs, and carrier spaces. Two subsystems defined for backbone cabling are:

1. Cabling Subsystem 2 is between horizontal and intermediate cross-connect (IC).

2. Cabling between the main cross-connect (MC) and an IC is Cabling Subsystem 3

Telecommunications Room and Telecommunications Enclosure 

Hardware in these spaces terminates backbone and horizontal cables. It's also where jumpers or patch cords are used on patch panels to cross-connect different cables. ICs or MCs may be installed here to provide additional connection resources.

Horizontal Cabling 

The job of horizontal cabling is to get telecom resources to users in their work areas. 

Horizontal cabling includes the cable, patch panels, connectors, jumpers, and patch cords in the TR/TE. They may also have multiuser telecommunications outlet assemblies and consolidation points to connect multiple devices or cables in a single connector.

Work Area 

The WA is the final destination of a structured cable system where the area from a jack, or connector, in a wall outlet to a user device using a cable. 

Structured cabling has greatly simplified installing voice and data communications equipment. In addition, its continued use means new equipment, such as IoT systems, will be easily supported.

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