-1. After examination of the initial proposals and selection of two or three finalists, additional sites may be added for revised technical proposals and pricing. Linking in the final network design will be a mix of round robin and point-to-point links between sites. Fully meshed network design is not technically prohibited; however, cost of such networks is likely not attractive. Furthermore, network management and utilization is unattractive because of operational complexity. Service providers are requested to study the topology and capacity requirements of the STL network and propose at least two ap- proaches. Each approach should be presented with a spreadsheet PRACTICAL IP AND TELECOM FOR BROADCAST ENGINEERING AND OPERATIONS Site 2 Site 3 Site 1 Site 4 Site N Site 5 Site 7 Site 6 FIGURE 7-1 STL Network Topology containing link numbers, site designation capacity, and pricing for each link. Specific routing details for each link are required to show active and passive network elements on each alternate route between sites. An analysis showing minimum and maximum time to repair a single failure of each active and passive element in each path or route will be included on a separate spreadsheet in the same file as linking and pricing. Network Interface and Capacity For the initial 3-year period, core network interface and capacity needs include diverse STS1 interface (51.81 Mbs) at each transmitter site and diverse OC12/STM4 (622 Mbs) interface at the central site. The service provider will include an estimate of the time, cost, and required notice for making additional capacity available in diverse STS1 increments. Service interface will be DVB-ASI across a BNC connector on either side of a bulkhead or patch panel of the service provider's choosing. In parallel with each service interface, the service provider will in- clude an Ethernet interface to the network management system to facilitate voice and data communications required to support net- work management. The service provider may provide access to the pu