Supplemental Guide – DOC. 8412A
UC-P100-S/UC-P110-S Phones for Skype for Business
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Configure VAD via the Web User Interface
Click Settings > Voice.
Settings > Voice
Select Enabled or Disabled from the VAD drop-down list.
Click Confirm to accept the change.
Comfort Noise Generation
Comfort Noise Generation (CNG) is used to generate background noise for voice
communications during periods of silence in a conversation.
NOTE:
VAD is used to send CN packets when the phone detect silence; CNG is used to
generate comfortable noise when the phone receives CN packets from the other side.
For example, A is talking with B. A: VAD=1, CNG=1
B: VAD=0, CNG=1
If A mutes the call, since VAD=1, A will send CN packets to B. When receiving CN packets,
B will generate comfortable noise.
If B mutes the call, since VAD=0, B will not send CN packets to A. So even if CNG=1 (B), A
will not hear comfortable noise.