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Title: Poorly written, poorly organized
Review: This is the only widely available book that covers SS7 is great detail. Unfortuntely, the writing is terrible and the organization is worse. Russel goes off on many pointless digressions and replicates material in almost every chapter. It is very hard to get a good idea of how SS7 actually works from this book, as few real-life examples are given. However, it isn't a bad place to start if you want to learn about SS7 from scratch. Then, once you understand the basics, do find another resource such as the standards to go to.
