Chapter 9. Dial Plans
Designing and implementing a dial plan has always been one of the more difficult aspects of a voice system. Every decision requires balancing ease of operation for the end user with ease of administration and scalability. Because all companies have different business requirements, a simple one-size-fits-all formula is not applicable.
A dial plan is composed of five components:
• Endpoint addressing
• Path selection
• Calling privileges
• Digit manipulation
• Call coverage
This chapter provides an overview of the decisions that you must make and the guidelines for working through common dial plan issues. The focus is on endpoint addressing and the fundamentals of how a gateway selects an appropriate path for a call. Chapter ...
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