Saturday, May 19, 2012

What Makes A Structured Cabling System?

You're in the shop for a new cabling infrastructure for your home or enterprise network and want a structured cabling system. But the request you have is what exactly Is a structured cabling system? The most prominent part of the respond to that request is that this type of cabling system is standards compliant. A structured cabling system is one that is properly documented and tested. It will also leave room for time to come network expansion as the need arises.

Compliance With International Standards

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Cabling systems must be installed according to standards set forth by inevitable international organizations tasked with identifying inevitable characteristics of the structured cabling system that can and will degrade system operation and quantifying testing methods and algorithms, as well as specifying levels of performance. As an example, in Europe, this organization is the International Standards Organisation (Iso) and in the Us, it's a blend of the American National Standards form and the Electronics commerce association along with the Telecommunications commerce association (Ansi/Eia/Tia). The standard, as set forth by these groups, is known as the Eia/Tia 568-B.3-2001(more for copper-based networks), along with the more up-to-date 568-C (Aimed more at fiber optic networks).

Proper Documentation

If you've ever looked into a cabling closet, it can be pretty confusing. It looks like theirs wires and cables just thrown in, somewhat like what spaghetti looks like after being cooked and drained. However, if the cabling system was properly documented during installation, just about whatever can walk into that cabling closet (known as an Intermediate Closet, entry Facility, or Telecommunications Room) and know exactly where each cable goes, whether it goes to an office or a seminar room, the back bedroom or the entertainment center. This is true whether the network is in your home and there are five nodes (A node is network endpoint, such as a computer, or Netflix-enabled device), or the network is in a commercial building and there are over a thousand nodes.

Full Standards compliancy Means Certification

There are a estimate of distinct ways that a structured cabling system can be tested to make sure it works. The easiest of these is a simple continuity check to make sure that there are no breaks in any of the private conductors inside the cable. The next step up is known as a wire map. This type of test makes sure that each private conductor at one end corresponds with the same conductor at the other end, which is known as properly punching the cable down, because terminations are made with a punch down tool.

These types of tests are Ok for a home network where the cable lengths are relatively short and the network isn't mission-critical. However, in a enterprise environment, that network absolutely is mission-critical and the network boss wants to make sure it will accomplish as advertised. This is where structured cabling certification comes into play. One function of certification is wiremapping. However, cable operation is also measured, with most of the operation metrics being crosstalk (where the signal from one cable "bleeds over" to another) and its many derivatives, such as Near- and Far-end Crosstalk and PowerSum Crosstalk. Crosstalk, since it degrades signal quality, must be minimized in order for the cable plant to accomplish as rated.

What Makes A Structured Cabling System?

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