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2.1 Introduction
- This chapter groups the AG Access functions according to the tasks a typical telephony application may perform. Such tasks include:
- Processing events
- Call control
- Voice play and record
- Digit (DTMF) collection
- Tone and DTMF generation
- DTMF and MF detection
- Echo cancelling
- Energy and tone detection
- Call progress analysis
- Sending and receiving Frequency Shift Key (FSK) data
- Low-level call control
- Using an on-board timer
- Parameter management
- Managing errors
- Utility functions
- Low-level AG board control
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