From Telecommunications Cabling Installation, Second Edition

Structured Cabling Systems (SCS)


An SCS is defined as the complete collective configuration of cabling and associated hardware at a given site that has been installed to provide a comprehensive telecommunications infrastructure. This infrastructure is intended to serve a wide range of usage, such as to provide access to telephone service or computer networks, and should not be device or application dependent.

In this manual, an SCS is further defined in terms of ownership. The SCS begins at the point at which the service provider (SP) terminates. This point is also known as the point of demarcation (demarc) or network interface device (NID).

For example, in a telephone system installation, the SP furnishes one or more service lines (per customer requirements). The SP connects the service lines at the point of demarcation.

Every structured cabling system is unique. This is due to variations in:

  • The architectural structure of the building that houses the telecommunications cabling installation.

  • Cable and connecting hardware.

  • The function of the cabling installation.

  • The types and characteristics of equipment that the cabling installation will support, both present and future.

  • The configuration of an existing cabling installation (in the cases of upgrades and retrofits).

  • Customer requirements.

  • Warranties offered by manufacturers.

Standardization of cabling installation.

Although the specifics of a cabling installation might be unique, the overall components of an SCS and the methods used to complete and maintain the cabling installation are relatively standard. The standardization of cabling installations is...

Products & Services
Network Wiring and Cabling Services
Network wiring and network cabling services install copper and fiber optic cable within buildings or central offices.
Telecommunications Infrastructure Services
Telecommunications infrastructure services provide setup, maintenance and consulting for all data and voice communications technologies.
Fiber Optic Connectors
Fiber optic connectors are used to align and join two or more fibers together to provide a means for attaching to, or decoupling from, a transmitter, receiver, or other fiber optic device.
Electrical Utility Services
Electrical utility services are involved in the design, siting, construction, service, repair, and inspection of electrical utility facilities, substations, and transmission and distribution lines.
Network Design and Development Services
Network design and development services design network topologies and ensure that all network devices can communicate with one another.

Topics of Interest

Codes, Standards, and Regulations Introduction Because telecommunications cabling installers work with other disciplines, such as data processing and the building industry, they must follow numerous...

Overview A telecommunications system s retrofit involves the replacement or augmentation of an existing installation. Performing a retrofit or extensive system upgrade will always be far more...

Testing Cabling Overview Characterizing cabling provides useful data to identify the ability of the cabling system to support existing and future equipment applications. The verification of the...

Overview This chapter covers, among other topics, home and office telephone wiring. This was work formerly done exclusively by telephone company employees because those companies owned of all the...

Introduction Pulling cable is an important part of a successful installation. In addition to pulling techniques, the telecommunications cabling installer must be familiar with industry standards and...