PSB4860 Ver la hoja de datos (PDF) - Siemens AG

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PSB4860

Digital Answering Machine with Full Duplex Speakerphone SAM EC

Siemens AG 

PSB 4860

List of Figures

Page

General

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Figure 6:

Pin Configuration of PSB 4860. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Logic Symbol of PSB 4860. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Block Diagram of PSB 4860 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Analog Full Duplex Speakerphone with Digital Answering Machine . . . . 20

Featurephone with Answering Machine for ISDN Terminal . . . . . . . . . . . 21

DECT Basestation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Functional Units

Figure 7: Functional Units - Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 8: Functional Units - Recording a Phone Conversation . . . . . . . . . . . . . . . . 25

Figure 9: Functional Units - Simultaneous Internal and External Call . . . . . . . . . . . 26

Figure 10: Speakerphone - Signal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 11: Speakerphone - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 12: Echo Cancellation Unit - Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 13: Echo Cancellation Unit - Typical Room Impulse Response . . . . . . . . . . . 29

Figure 14: Echo Suppression Unit - States of Operation. . . . . . . . . . . . . . . . . . . . . . 30

Figure 15: Echo Suppression Unit - Signal Flow Graph . . . . . . . . . . . . . . . . . . . . . . 31

Figure 16: Speech Detector - Signal Flow Graph . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 17: Speech Comparator - Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 18: Speech Comparator - Interdependence of Parameters . . . . . . . . . . . . . . 36

Figure 19: Echo Suppression Unit - Automatic Gain Control. . . . . . . . . . . . . . . . . . . 39

Figure 20: Line Echo Cancellation Unit - Block Diagram. . . . . . . . . . . . . . . . . . . . . . 42

Figure 21: DTMF Detector - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 22: CNG Detector - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 23: Alert Tone Detector - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 24: CPT Detector - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 25: CPT Detector - Cooked Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 26: Caller ID Decoder - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 27: DTMF Generator - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 28: Speech Coder - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 29: Speech Decoder - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 30: Analog Front End Interface - Block Diagram . . . . . . . . . . . . . . . . . . . . . . 55

Figure 31: Digital Interface - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 32: Universal Attenuator - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Figure 33: Automatic Gain Control Unit - Block Diagram . . . . . . . . . . . . . . . . . . . . . 59

Figure 34: Equalizer - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Memory Management

Figure 35: Memory Management - Data Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 36: Memory Management - Directory Structure . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 37: Audio File Organization - Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 38: Binary File Organization - Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Semiconductor Group

5

10.97

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