Polycom SIP 3.1 Administrator's Manual page 202

Administrator's Guide SoundPoint IP / SoundStation IP
Attribute
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
Note
Attribute
voice.agc.hs.enable
voice.agc.hd.enable
voice.agc.hf.enable
A - 48
Automatic Gain Control <agc/>
These settings control the performance of the transmit automatic gain control
feature.
Automatic Gain Control will be implemented in a future release.
Polycom recommends that you do not change these values.
Default
1
-6
-9
1
-6
-9
Default
0
0
0