Text Box: Data Backbone Cabling Selecting the right cable for backbone systems can be both painstaking and time consuming due to the multitude of cable choices being developed to fit many different environments and layouts. Data backbones are more complex than voice as datacom applications typically require more bandwidth and faster speeds than voice communications. Today’s preferred choice of backbone cables are singlemode and multimode optical fiber. The deciding factors in choosing the correct Fiber include the distance between the closets, the environment, and the saturation of users and applications in the system. Optical fiber has been the obvious choice of media because its increased distances, greater bandwidth potential, EMI Text Box: immunity, and lack of grounding requirements. Long Distances for Campus Networks The distance between the main cross-connect and the intermediate cross-connects is the primary deciding factor of transmission media, especially since no more than one crossconnect is allowed. Traditionally, singlemode fiber was recommended for greater distances (under 3.0 km [1.9 mi]) and data rates up to 10 Gb/s. However, many campuses are not that expansive and do not warrant singlemode with its expensive connectivity and active components. Maximum distance that campus backbone cables can be run will be factored with the type of applications being supported. Shorter optical fiber runs yield lower losses, which then support larger bandwidth applications. Manufacturers now Text Box: offer a lower cost option of a laser-optimized 50 µm multimode optical fiber cable that can carry up to 10 Gb/s for lengths of up to 300 m (984 ft), becoming the perfect alternativesolution to an expensive singlemode system in the backbone. The DataCom Group Engineers can design a solution that will fit your application. Call 888-505-DATA for a network design and installation by BICSI Certified Professionals. Text Box: Communications Cabling News Text Box: Intermittent Network Errors. Phone System Crashes. Electrical Shock. Are all possible grounding problems with your telecommunications system. A properly grounded system provides for increased reliability and improved life safety. Text Box: This issue will primarily cover the ANSI/EIA/TIA-758-A standards covering Customer Owner Outside Plant (CO-OSP). Future issues shall cover inside bonding and grounding as it relates to the telecommunications system infrastructure. Text Box: Most people (and some designers) consider grounding & bonding an electrical issue and may place little importance of grounding & bonding the telecommunications infrastructure. Only after damage has occurred from voltage and current do Text Box: Ground NOW or PAY Later

The DataCom Group                                        888-505-DATA
Text Box: April 11, 2005 Text Box: Vol. 7, Issue 1

Project Showcase

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DataCom News

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Quotable Quotes

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Quick Tips

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Clearance Sale !!!!

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