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Chapter 5

Detectors, Generators, and Low-Level Call Control


5.1 Introduction
5.2 Generating DTMFs and Tones
5.2.1 Tone Generation Parameters
5.2.2 Terminating Tone Generation
5.2.3 System Restrictions
5.3 Detecting DTMFs
5.3.1 DTMF Detection Parameters
5.3.2 Terminating DTMF Detection
5.4 Using the Energy Detector
5.4.1 Energy Detection Parameters
5.4.2 Terminating Energy Detection
5.5 Using Tone Detectors
5.5.1 Tone Detection Parameters
5.5.2 Terminating Tone Detection
5.6 Low-Level Call Control
5.7 Using On-board Timers
5.7.1 Starting the Timer
5.7.2 Start Timer Events
5.7.3 Stopping the Timer
5.7.4 Stop Timer Event


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