Polycom SIP 3.0.2 Administrator's Manual page 285

Gains <gain/>
Attribute
voice.gain.rx.analog.chassis.IP_6000
voice.gain.rx.analog.ringer.IP_6000
voice.gain.rx.digital.chassis.IP_6000
voice.gain.rx.digital.ringer.IP_6000
voice.gain.tx.analog.chassis.IP_6000
voice.gain.tx.digital.chassis.IP_6000
Receive Equalization <rxEq/>
Attribute
voice.rxEq.hf.IP_6000.preFilter.enable
voice.rxEq.hf.IP_6000.postFilter.enable
The default gain settings have been carefully adjusted to comply with the
TIA-810-A digital telephony standard.
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 6000
Default
0
0
6
-21
0
6
Default
0
0
1 - 5