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Until UC stabilizes into a few configuration profiles, each case will likely be unique. A mix of hardware vendors and carriers will generate more permutations and combinations than any book could itemize reasonably. Setting up a gateway, session border controller, or call control server is different for each device. Good vendors provide written instructions and user manuals that consist of thousands of pages of detailed references to their command line interfaces, web portals, or SNMP MIB extensions.
That amount of detail doesn't contribute to the broad understanding that is the goal of this book. What follows is common across all situations.