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NSCC Executive Summary CBG Communications, Inc. <br /> approach would most likely incur a significant recurring charge with the cellular carrier <br /> or at least an occasional surcharge when the circuit is actually in use. <br /> Even if wireless methods are chosen because of their high degree of flexibility to be used <br /> anywhere within the NSCC franchise area, we recommend that there always be an <br /> alternate wireline solution. <br /> • Upgrade of the PRISMA Interconnect System <br /> The current capacity utilized on the PRISMA interconnect system between CTV and <br /> other access entities in the Twin Cities has functioned well for both video and data <br /> communications across the region. However, with the advent of HD transport between <br /> and among entities, it will be necessary to upgrade the PRISMA interconnect as well. <br /> Our understanding is that there is significant excess capacity available within the current <br /> PRISMA equipment chassis and across the fiber transport links from hub to hub. <br /> However,this capacity is gated so that CTV currently is able to only use 20—30 Mbps of <br /> transport capacity. We believe that at least 50 Mbps per entity,per segment,needs to be <br /> dedicated, up to a total limit of 250 Mbps, that can be utilized within the I Gbps <br /> connection. This should provide significant capacity for HD video as well as data <br /> communications. <br /> All of the above findings and recommendations will be explained in more detail in the Full <br /> Report. <br /> xviii <br />