The maximum value of any wired data network is closely linked to the efficiency of the data cabling design. But how can you realize an efficient cabling design in light of so many variables like number of users, location of workstations, number of end devices, emerging cabling standards and the plethora of cabling choices? And you can bet that these variables are just what the name implies: they all will most certainly change.

Here's a high-level overview to help you identify the key elements to include in your next data cabling project:

Assessment - Determine the present computing needs (and the condition of the existing inside cable plant if applicable). A realistic growth margin should be incorporated for number of users (typically 15%-30%). Don't forget: if you build it, they will come.

Cabling & Topology - In light of the ever increasing need for greater volumes of data over the network the most efficient design will always employ the highest rated Category copper cabling and associated components afforded by the budget (Category 5e minimum). The use of fiber out to the desktop should be justified user-by-user based upon the intended applications.

(top, next column)

However, fiber in the backbone is an absolute must. The design should ensure adequate and safe support of all cable in each pathway. The star topology described below by the interconnections between closets and out to each work area provides the most flexibility for growth, ease of maintenance and simplicity in troubleshooting.

Floor Telecommunications Closet (Intermediate Distribution Facility - IDF) - Design this location to serve the floor on which it is located based on the assessment results. This closet is to be centrally located so as to ensure that all cable lengths out to the outlets are less than 90 meters (295 feet). In large buildings, several IDF's per floor may be required in some instances to adhere to this maximum cable length requirement.

Outlets - Specify the required number of data outlets at each work area. Each outlet should be wired back to the IDF with a distinct, dedicated 4-pair cable. Provisions should be made back at the IDF to wire, as needed, those jacks that require fiber optic cables. Typical outlet configurations are two data, and one voice.

Main Telecommunications Closet (Main Distribution Facility MDF) - This location should be designed/sized to serve the entire building based on the assessment results. This closet should interconnect with each IDF via distinct, dedicated multimode and single-mode fiber optic backbone cables.

   << Previous Page