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B-2 <br /> network will monitor power supplies as well. These power supplies have dry cell <br /> battery back up power to maintain system reliability in the event of commercial <br /> power failure. <br /> Each fiber node in the City will have no more than two (2) amplifiers in <br /> cascade. This adds to system reliability by limiting the number of customers <br /> served by any active component. The active electronics are designed to operate <br /> up to 860 MHz. The coaxial portion of the network will be constructed using .540 <br /> coaxial cable, LRC connectors, and shrink tubing for corrosion protection. <br /> Drop cable will be RG-6 quad shield coaxial cable mated with a multi-pair <br /> copper cable to permit both video and traditional telephone to be provided via a <br /> single service line. Additionally, RCN will install a residential service unit (RSU) <br /> on the side of each residence that takes telephone service that will terminate <br /> both the coaxial and telephone connections in a neat and orderly manner. <br /> The system will be capable of continuous twenty-four (24) hour daily <br /> operation without material degradation of service quality except circumstances <br /> such as natural disasters or solar outages and other atmospheric conditions. <br /> System specifications call for operating over a temperature range ofโ€”20 degrees <br /> to +120 degrees Fahrenheit and over a variation in supply voltages from 105 to <br /> 130 volts. <br /> Design specifications include standby power generating capacity at the <br /> TC and at all Hubs for a minimum of twelve hours with automatic dialer response <br /> systems to alert RCN personnel in the event of a commercial power failure. The <br /> standby power supplies for the nodes and distribution will be capable of <br /> providing power to the system for not less than six (6) hours according to <br /> manufacturer specification. RCN will maintain sufficient portable gasoline <br />