Polycom SIP 2.2.0 Administrator's Manual page 154

Administrator's Guide SoundPoint IP / SoundStation IP
Attribute
voice.ns.hs.enable
voice.ns.hs.signalAttn
voice.ns.hs.silenceAttn
voice.ns.hd.enable
voice.ns.hd.signalAttn
voice.ns.hd.silenceAttn
voice.ns.hf.enable
voice.ns.hf.signalAttn
voice.ns.hf.silenceAttn
voice.ns.hf.IP_4000.enable
voice.ns.hf.IP_4000.signalAttn
voice.ns.hf.IP_4000.silenceAttn
A - 42
Background Noise Suppression <ns/>
These settings control the performance of the transmit background noise
suppression feature.
Polycom recommends that you do not change these values.
Default
0
-6
-9
0
0
0
1
-6
-9
1
-6
-9