Polycom IP 320 Administrator's Manual page 426

Attribute
voice.aes.hf.duplexBalance.IP_5000.6
voice.aes.hf.duplexBalance.IP_5000.7
voice.aes.hf.duplexBalance.IP_5000.8
Background Noise Suppression <ns/>
Attribute
voice.ns.hs.enable
voice.ns.hf.IP_5000.enable
voice.ns.hf.IP_5000.signalAttn
voice.ns.hf.IP_5000.silenceAttn
Receive Equalization <rxEq/>
Attribute
voice.rxEq.hf.IP_5000.preFilter.enable
voice.rxEq.hf.IP_5000.postFilter.enable
These settings control the performance of the transmit background noise
suppression feature.
Polycom recommends that you do not change these values.
These settings control the performance of the receive equalization feature.
Polycom recommends that you do not change these values.
Administrator's Guide Addendum for the SoundStation IP 5000 Phone
Default
4
3
2
Default
1
1
-6
-9
Default
1
0
5