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block, patch panel to station outlet, or as appropriate. <br />c. Each installed cable will be performance verified by providing results for <br />the following tests, indicatingthe worst -case result, the frequency at which <br />it occurs, the limit at that point, and the margin: <br />• Pair -to -Pair Near End Crosstalk (NEXT) <br />• Power Sum Near End Crosstalk (PSNEXT) <br />• Equal Level Far End Crosstalk ( ELFEXT) <br />• Power Sum Equal Level Far End Crosstalk (PSELFEXT) <br />• Attenuation to Crosstalk Ratio (ACR) <br />• Power Sum Attenuation to Crosstalk Ratio (PSACR) <br />• Return Loss (RL) <br />d. When required, all test results will be printed directly from test unit or <br />software in conjunction with test unit. No handwritten test results will be <br />accepted. <br />IV. Fiber -Optic Cabling Specifications. <br />A. The Proposer will be required to provide, install, repair/replace, modify and <br />terminate cable and related components. <br />B. The City Minimum Standards <br />a. The current cable specifications used bythe City for fiber-optic installations <br />include OM3 multimode 50/125 and/or 62.5/125 and OS1/OS2 single <br />mode 9/125,, 4-strand, 6-strand, 12- strand, and 24-strand. The City <br />reserves the right to add or modify standard fiber-optic cabling types as <br />needed throughout the duration of the resulting contract. <br />e. All fiber-optic bend radii must comply with manufacturer specifications <br />f. There will be no splices on any fiber runs. <br />g. All fiber-optic patch panels will be installed according to manufacturer's <br />specifications. <br />h. Any fiber strands with losses higher than established standards will be <br />repaired or replaced at no cost to the City. <br />C. Testing Procedures <br />a. Each installed fiber-optic strand will be tested for end -to -end attenuation <br />with an optical power meter and light source. Cable length and attenuation <br />will be tested and reported using an Optical Time Domain Reflectometer <br />(OTDR). <br />b. The Proposer will measure all horizontal and backbone multimode fiber <br />attenuation at 850 nm (nanometers) and 1300 nm, and all single mode <br />fiber attenuation at 1310 nm and 1500 nm, using an LED light source and <br />On -Call Network Cabling Services 22-032 <br />13 <br />