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EXHIBIT "B" <br /> FIBER SPECIFICATIONS AND CONNECTION DETAILS <br /> FIBER: <br /> All Fiber will meet or exceed the Corning SMF-28, dual 1310/1550 window optical glass <br /> specifications: <br /> Maximum attenuation for 1310 nm systems will be .35 dB/km <br /> Maximum attenuation for 1550 nm systems will be .25 dB/km <br /> SPAN SPECIFICATIONS: <br /> Discontinuities (known as steps, Splices, or attenuation non-uniformities) shall be <br /> measured with an Optical Time Domain Reflectometer (OTDR) to determine the loss for <br /> the localized attenuation. <br /> No Fiber shall show a point discontinuity greater than 1.0 dB. However, a Fiber Span <br /> that includes a discontinuity in excess of specifications may still be considered <br /> acceptable, with mutual agreement of IRC and LICENSEE, provided said Fiber still meets <br /> LICENSEE's overall attenuation and dispersion specifications. <br /> Performance levels will be maintained as accepted through the duration of the <br /> Agreement. <br /> OPTICAL SYSTEM LOSS TABLE <br /> WAVE MAXIMUM MAXIMUM AVERAGE MAXIMUM AVERAGE <br /> LENGTH NM FIBER CONNECTOR LOSS PER LOSS PER LOSS PER <br /> LOSS/KM LOSS SECTION SPLICE SPLICE <br /> 1310 .35 dB .5 dB .06 dB .2 dB .06 dB <br /> 1550 .25 dB .5 dB .06 dB .2 dB .06 dB <br /> GENERAL CONSTRUCTION: <br /> The Fiber Optic Cable will be constructed in accordance with sound commercial practices. <br /> The National Electric Safety Code will be followed in every case except where local <br /> regulations are more stringent, in which case local regulations shall govern. <br /> Optical and span test data, including OTDR traces, will be submitted by IRC to LICENSEE <br /> at an agreed upon schedule. <br /> 36 <br />