atically reroute around network failures because the Frame Relay switches have the intelligence and capability to obtain network status, interpret the status, and take the appropriate action depending on the interpretation, like redirecting traffic to a different trunk because the primary trunk has failed. Why Frame Relay Was Developed Major trends in the industry led to the development of Frame Relay ser- vices, as shown in Figure 9-5. These can be categorized into four major trends: The increased need for speed across the network platforms within the end-user and the carrier networks The need for higher speeds is driven by the move away from the original text-based services to the current graphics-oriented services and the bursty, time- sensitive data needs of the user through new applications. The proliferation of LANs and now the client/server architectures that are being deployed have shifted the paradigm of computing platforms. The demands of these services will exceed the data transport needs of the older text-based services by hundreds of thousands of times. Users demand more readily available connectivity and the speed to ensure quick and reliable communications between systems or services. Fortunately, the bursty nature of the way we conduct our business Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. PCUSN-to-SGSN Interface (Gb) PCUSN-to-SGSN Interface (Gb) Frame Relay Frame Relay Figure 9-5 Why Frame Relay was developed. Frame Relay Network FR Switch FR Switch enables the sharing of resources among many users who thereby share the bandwidth available. To accommodate this connectivity in a quick manner, some changes had to be made, and the protocol dependency and processing of the networks had to be minimized. One way to accommodate the reduced overhead associated with the network was to eliminate some of the processing, mainly in