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| A centralized optical fiber cabling link segment shall be tested in one direction at one wavelength only. Because of the short length of cabling (300 m [984 ft] or less), attenuation deltas due to wavelength are insignificant. The centralized link shall be tested at 850 nm or 1300 nm (850 nm recommended) in one direction in accordance with ANSI/TIA/EIA-526-14A, Method B, One Reference Jumper. The attenuation test results shall be less than 3.3 dB. This value is based on the loss of three (3) connector pairs, one (1) pair at the telecommunications outlet/connector, one (1) pair at the interconnect center in the telecommunications room, and one (1) pair at the centralized cross-connect, plus 300 m (984 ft) of optical fiber cable. For centralized optical fiber cabling link segments implemented in conjunction with open office cabling with a consolidation point, the attenuation results shall be less than 4.1 dB.

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