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6.2 Auxiliary Headend Powering <br />The auxiliary power being delivered in the La Mirada headend, is a dual <br />backup generator running in redundancy mode for much more extensive <br />fault recovery because this Headend serves video for multiple cities that <br />includes Santa Ana. The Santa Ana Second St. Node is auxiliary powered <br />by a 75KW Diesel backup Generator and a UPS system. <br />6.3 Standby Power Supplies <br />The Time Warner power supply status has not changed from the previous <br />year. The long-term plan is to install status -monitoring equipment into the <br />power supply for more proactive monitoring. With the new acquisition of <br />the cable system by Time Warner, the power supply upgrade project is <br />anticipated to move forward. It is CSG's recommendation for Time Warner <br />to address the power supply upgrade strategy with a proposed plan and <br />timeline to upgrade the power supplies as the acquisition moves forward. <br />The 60 -volt commercially fed power supplies in the field provide system <br />powering. These units have a battery backup that depending on the draw <br />from the unit will power the system for up to two hours should commercial <br />power fail. In light of the on-going probability of natural disasters in <br />southern California, standby power supplies are an essential component <br />of a cable system's emergency operation capacity. Time Warner has <br />replaced their old power supplies with new Alpha systems power supplies. <br />This will allow Time Warner to become more pro -active and minimize <br />downtime in outage situations. Time Warner runs tests on all of the power <br />supply units on a quarterly basis. <br />6.4 Residential Network <br />As noted earlier, distribution system testing was done in two phases. The <br />first of these tests were performed by Time Warner in Feb 2007 and the <br />second phase of testing was performed on July 26th and July 27th 2007. <br />These tests were monitored by Mr. Whitfield and were performed using <br />Hewlett Packard and Trialithic test equipment. The first set of tests <br />covered the 24-hour test and also shows performance regarding all carrier <br />levels and required relationships. The second test also covered carrier <br />levels and expanded to include C/N, CTB, In Channel Response and <br />Hum. The test locations included as follows: <br />Communications Support Group, VP RPT2007.001 Page 8 <br />