Business NeedTo support the business services, Fleet Call is installing a series of HP 9000UNIX systems. These systems will run subscriber maintenance and financialapplications critical for Fleet Call’s day-to-day operations. The HP 9000systems are housed in a centralized data center.All remote Fleet Call sites will need real-time access to the host systems. Toachieve this connectivity, Fleet Call has designed a robust and high-perform-ing wide area and local area topology.ApplicationsFleet Call’s host systems will run several applications. In addition to thesubscriber and financial applications, a number of engineering applicationsare also under investigation. Users will access the host applications from PCand Macintosh workstations distributed across the network. The work-stations will be equipped with network software and hardware to allowTelnet access to the host systems over TCP/IP for terminal emulation. Hostprinting will also be spooled over the network to TCP/IP-equipped HPLaserJet printers. It is Fleet Call’s goal to provide a completely transparentnetwork, with 100% uptime.Network TopologyFleet Call’s network focuses principally at providing connectivity to the HP9000 systems. A two-tiered network topology is used: First, a networkbackbone interconnects a key site in each of the principal market areas. Thisbackbone will provide a “data highway”, allowing data communicationbetween the remote sites and the data center at high bandwidths.Frame Relay Network Design: Fleet Call, Inc.Business Need3-106