HP 200 Series Services And Applications page 301

Frame Relay Network Design: Fleet Call, Inc.
Network Topology
At the second tier, each of the backbone sites concentrate wide area
connections from the remote offices located in that market area. These
nearby offices or "tail sites" will rely on the backbone connection for
communication to other market areas or the data center. This topology is
summarized in figure 1.
Northern CA/SF Area
TAIL SITE OFFICES
BACKBONE
SITE
Southern CA/LA Area
BACKBONE
SITE
TAIL SITE OFFICES
Figure 1. Two-Tiered Topology
Each tail site will be equipped with a small network router that allows
connection of the local PC network to the backbone through wide area
links. Routers were chosen rather than bridges because routing technology
provides a greater level of network traffic filtering. The Fleet Call network
will grow to incorporate many hundreds of nodes, and optimizing the
bandwidth utilization of the wide area links is essential to preserve high
performance and minimize cost.
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