In certain situations or scenarios it may be preferable to change the factory default of comfort noise utilizing a Microsoft Lync or Skype for Business Server.
UC Software 5.4.2 or later added the below.
Parameter Recommendation |
Parameter Range |
Default Value |
Result |
||
voice.cn.hs.enable="1" |
0 or 1 |
0 |
Enables the in-band comfort noise fill |
|
|
voice.cn.hs.attn="35" |
90 to -90 |
0 |
Sets the in-band comfort noise attenuation (lower numbers are louder, we suggest no lower / louder than 35) |
|
|
voice.vadEnable="0" |
0 or 1 |
0 |
Disables VAD Tx – VAD Rx CNG packets will still be properly received to synthesize local comfort noise |
|
|
voice.vadRxGain="10" |
20 to -20 |
0 |
Boosts the VAD CNG synthesis level by 10 dB – subjectively matches the customer site RTP capture |
|
|
voice.vadTxGain="-10" |
20 to -20 |
0 |
Reduces the VAD CNG packet payload value by 10 dB – effectively prevents the synthesis boost in voice.vadRxGain from changing the level in a VVX to VVX call |
|
|
voice.vadRxGain == -voice.vadTxGain |
|
Restores default behavior |
|
||
G.722 calls, vadTxGain and vadRxGain have no effect (expected) |
|
|
|||
voice.plcCnEnable="1" |
0 or 1 |
0 |
Enables local comfort noise generation when far end stops sending RTP and no CN packet is sent |
|
|
voice.plcCnGain="0" |
20 to -20 |
0 |
Changes the loudness of local comfort noise generation when voice.plcCnEnable is set to 1 |
|