ever the program content is coming from. Move back through the program content food chain, and it's the same for the broadcaster. What's important is the connection between their transmitter input and where the content is originating. As long as it arrives and goes out intact, not much else matters. Moving content through networks involves three components: the NID, Network Access, and Network Transport. Figure 3 shows the basic End-to-End Service reference model. One final notion about the nature of the end-to-end service model is the fact that it can be applied to sub-nets and individual links in an overall network architecture. Designing, specifying, accepting de- liverables, or troubleshooting on a design or component failure level can be conducted on individual components delivered by one or more suppliers in a straight forward, scalable, objective fashion, eliminating finger-pointing. These three components work well in single, point-to-point links without network management; however, the ability to change vari- ous configuration parameters and provide performance parameters and report errors or failures enhances operational success. As the number of locations served increase, network management becomes a critical, necessary function. End-To-End Content Transport Service Internet / Telecom Equipment & Facilities Network Broadcast Switching Network Broadcast Interface Access Access Interface Facility Device Transport Device Facility FIGURE 3 Block Diagram End-To-End Service Components INTRODUCTION These three models are generic and can be used as a basic foundation for day day-to-day design, planning, and operations. There's very little about the subject matter in the book that doesn't have a place somewhere in one or all the models; there's not much you need to worry about that one or all three do not cover. SURVIVING LONG TERM How to survive long term is an underlying philosophy throughout the book. Someone once said, "Hand a man a fish and feed him for a day. Teach him to fish and feed him for life." This