User`s manual

VLSI
Solution
y
HH
VS1000+1003 VoIP Speaker Phone VSMPG
List of Figures
1.1 VoIP Speaker Phone Demonstration Unit . . . . . . . . . . . . . . . . . . 5
3.1 The User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 VS1000+VS1003 VoIP Speaker Phone State Machine . . . . . . . . . . . . 10
5.1 How to Connect an RS232 Adapter to VLSI’s VoIP Board . . . . . . . . . 18
5.2 Two Possible RS232 Jumper Configurations in Some Adapters . . . . . . 18
6.1 VoIP Conversation using Two Headsets . . . . . . . . . . . . . . . . . . . 20
6.2 VoIP Conversation Using Microphone and Speaker, No Echo Cancellation 21
6.3 VoIP Conversation Using VoIP Speaker Phone with Echo Cancellation . . 21
7.1 VoIP Speaker Phone Schematics 1/2 . . . . . . . . . . . . . . . . . . . . . 24
7.2 VoIP Speaker Phone Schematics 2/2 . . . . . . . . . . . . . . . . . . . . . 25
Rev. 2.12
2008-09-18
Page 4(30)