The combination of light and glass presents some unique properties that give AV professionals powerful tools in common AV applications. A fiber optic cable can be used to send high resolution video, audio, and control signals on a single fiber over 30 km (18.75 miles), and avoids the risk of signal loss or degradation, ground loop hums, and electri. In a fiber optic AV system, the physical topology describes the arrangement of sources and displays, and how they are connected to each other. The most common topologies are point-to-point, daisy chain, and star configurations as shown in Figure 1. The point-to-point configuration is used for simple signal extension over fiber optic cabling. Daisy-. A fiber optic cable infrastructure, installed per the TIA/EIA-568 Commercial Building Wiring Standard, has a hierarchical star topology as shown in Figure 3. An equipment room – ER provides cross connects for terminating cables into switching, routing, and other equipment. The top level equipment room within the hierarchy contains the main cross co. The type of cabling to use in a fiber optic AV system depends on a variety of factors, including the number of fibers needed, termination options, where the cable is being installed, and how the cable is being used within the infrastructure. For example, the fiber optic AV system shown in Figure 5 uses a centralized switching and distribution syste. In a multi-level facility where an equipment room serves work areas on more than a single floor, as shown in Figure 6, a telecom room is required on each floor. A patch panel or splice enclosure within the telecom room enables reconfiguring a floor's network, and provides a convenient transition point from horizontal to backbone cabling. It is poss.