A dial plan is a set of rules and instructions that govern how calls are routed and processed in a telecommunications system, particularly in Voice over Internet Protocol (VoIP) systems and Private Branch Exchanges (PBXs). It defines how telephone numbers are dialed, how calls are initiated, and how they are connected to their destinations. Key components of a dial plan include: 1. **Number Formatting**: Dial plans specify how numbers should be formatted for local, national, and international calls.
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