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The ISI power penalty at 300 meters is 3.0 dB and is guaranteed by meeting the effective modal bandwidth requirement of 2000 MHz-km at 850 nm.
1 A 100 Mb/s multimode optical fiber data link, up to 2 km, taken from the FDDI physical medium dependent specifications: Nominal core diameter: 62.5 Cladding diameter: 125.0 [+ or -] 3.0 Modal bandwidth (1,300 nm): 500 MHz/km Attentuation for link, including component loss (1,300 nm): 11.0 dB Nominal numerical aperture: 0.275
2 A 155 Mb/s multimode optical fiber link (topology and distance requirements stated in EIA/TIA 568 Commercial Building Telecommunications Wiring Standard): Nominal core diameter: 62.5 Cladding diameter: 125.0 Modal bandwidth (1,300 nm): 500 MHz/km Fiber attenuation (1,300 nm): [is less than or equal to] 1.5 dB/km Zero dispersion wavelength range: 1,295 nm to 1,365 nm Zero dispersion slope: [is less than or equal to] 0.110 pl/[nm.sup.2]/km (Allowances are made for other fiber sizes, but these impact the maximum 2-km link length and may not be compatible with ATM equipment from different suppliers.)