broadband strategies handbook.pdf - Khazar University

Figure 5.11 Diagram of Various FTTx Systemsoptical fibersmetallic cablesFTTN>1,000 ft. (300 m)FTTC>1,000 ft. (300 m)FTTBFTTHSource: Wikipedia, http://upload.wikimedia.org/wikipedia/commons/3/32/FTTX.png.Note: The building on the left represents the central office; the building on the right represents one ofthe buildings served by the central office. The dotted rectangles represent separate living or officespaces within the same building.designed with various topologies: point-to-point, where the optical fiberlink is dedicated to traffic from a single subscriber; point-to-multipoint,where fiber optic cables branch to more than one premise and thus sharetraffic; and a ring, where the fiber optic cable is designed in a closed loopthat connects various premises. The information flowing over the fiberoptic cable is guided by protocols that have been standardized by theIEEE or the ITU (table 5.3).Technologies to Support Deployment of Broadband Infrastructure 227