IA/TIA 568-B.1 link loss and length for multi- mode 62.5/125-um and multimode 50/125-um fiber. As indicated by the reference to two equations in the footnotes of the table, the maximum loss for centralized and backbone cabling is based on the number of connection pairs, the number of splices, and the length of the cable. Chapter Three TABLE 3.4 Maximum loss EIA/TIA-568-B. 1 Mul- Cable Use 850 nm 1300 nm Maximum length, m timode 62.5 and Horizontal 2.0 dB 2.0 dB 50/125-um Optical Fiber Link Loss and Centralized See Eq. 1* Eq. 2+ Cable Length Backbone See Eq. 1* Eq. 2+ *Equation 1: Maximum loss = (number of connection pairs X 0.75 dB) + (number of splices X 0.3 dB) + (length X 3.5 dB/km) Equation 2: Maximum loss = (number of connection pairs X 0.075 dB) + (number of splices X 0.3 dB) + (length X 1.5 dB/km) In examining the footnotes in Table 3.4, you will notice values associ- ated with a mated connection (connector pair), splice, and cable length. Those are the recommended values for each category of impairment that generates an optical loss. Thus, you can compute a relevant loss bud- get by determining the length of the link, the number of connectors, and the number of splices and then use the relevant equation. Team-Fly® CHAPTER Light Sources and Detectors Chapter Four By itself, an optical fiber can be considered as equivalent to a hose without water or a wire without current. To provide the system with transmission capability, an optical fiber requires a light source at one of its ends and a light detector at the destination. Thus, the purpose of this chapter is to become acquainted with the use of optical fiber as a transmission system by focusing on the transmitter and the receiver used in such systems. To accomplish this goal, we will discuss the operating characteristics of light- emitting diodes (LEDs) and lasers. Once this is accomplished, we will consid- er the operational characteristics of different types of optical receivers, which are commonly referred to as detectors or optical detectors. Because y