Tham khảo tài liệu 'adc krone - cabling guide - planning for 10gbps ethernet over utp', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | WHITE PAPER Planning for 10Gbps Ethernet over UTP Questions to Ask When Planning the Cabling Plant Planning for 10Gbps Ethernet over UTP Questions to Ask When Planning the Cabling Plant Planning a copper cabling plant to support 10Gbps transmission is complicated today by the absence of ratified standards. There are, however, some questions you can ask that can help you navigate promises and claims in the market place and, ultimately, help you select the proper infrastructure to support future 10Gbps UTP applications. Do you really need a cabling plant that can support 10Gbps Ethernet over UTP? Historically speaking, cabling installed has always led the primary data rate. For example, over 90% of switch port sales in 1995 were for the 10Mbps Ethernet protocol. Yet in that same year, the primary UTP cabling installed was the 100Mbps Category 5, accounting for nearly 70% of UTP installed market share. Similarly in 2001, about 70% of switch port sales were for 100Mbps. In the same year, Category 5e and Category 6, which both support 1000Mbps, accounted for over 80% of UTP cabling installed. Of course, the next logical step in the data rate is another ten-fold increase to 10Gbps. With 10Gbps copper transceivers in development today and expected to market in 2006, the cabling plant must be able to handle the new protocol. Can Category 6 cabling support 10Gbps Ethernet over UTP? Actually, Category 6 cabling can support 10Gbps transmission—but only to 55 meters, per TIA , Cat 6–TSB155. However, this is a costly proposition. The added construction costs for more telecom rooms to accommodate 55 meters (vs. the standard 100 meters) are nominal compared to the added costs of purchasing additional Ethernet switches and other active equipment for each additional telecom room to support data, VoIP or other applications. What draft standards are important? Clearly, a 10Gbps UTP cabling solution should support the full 100 meters. From a standards perspective, TIA , .
