User`s manual

VLSI
Solution
y
HH
VS1000+1003 VoIP Speaker Phone VSMPG
4.3.1 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.2 Using Mass Storage Device Mode . . . . . . . . . . . . . . . . . . . 16
4.4 Using as Media Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.1 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.2 Using the Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.3 Voice Recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 Loading New Software 18
6 Echo Cancellation 20
6.1 What Is Echo Cancellation . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1.1 Headsets Are Usually Not a Problem . . . . . . . . . . . . . . . . . 20
6.1.2 Using a Speaker and a Microphone without Echo Cancellation . . 21
6.1.3 Echo Cancellation Helps Reducing Speaker Echo . . . . . . . . . . 21
6.2 Performance of Echo Cancellation . . . . . . . . . . . . . . . . . . . . . . 22
6.3 Limits of Echo Cancellation . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7 Schematics 23
7.1 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.2 Layout Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8 Document Version History 27
9 Further Help 29
10 Contact Information 30
Rev. 2.12
2008-09-18
Page 3(30)