Polycom SOUNDPOINT SIP 3.1 - Manual (Page 200)

Administrator’s Guide SoundPoint IP / SoundStation IP
A - 46
Acoustic Echo Suppression <aes/>
These settings control the performance of the speakerphone acoustic echo
suppressor.
voice.aec.hd.lowFreqCutOff 100
voice.aec.hd.highFreqCutOff 7000
voice.aec.hd.erlTab_0_300 -24
voice.aec.hd.erlTab_300_600 -24
voice.aec.hd.erlTab_600_1500 -24
voice.aec.hd.erlTab_1500_3500 -24
voice.aec.hd.erlTab_3500_7000 -24
voice.aec.hf.enable 1
voice.aec.hf.lowFreqCutOff 100
voice.aec.hf.highFreqCutOff 7000
voice.aec.hf.erlTab_0_300 -6
voice.aec.hf.erlTab_300_600 -6
voice.aec.hf.erlTab_600_1500 -6
voice.aec.hf.erlTab_1500_3500 -6
voice.aec.hf.erlTab_3500_7000 -6
Attribute Default
Polycom recommends that you do not change these values.
Attribute Default
voice.aes.hs.enable 1
voice.aes.hs.duplexBalance 7
voice.aes.hd.enable 0
voice.aes.hd.duplexBalance 0
voice.aes.hf.enable 1
voice.aes.hf.duplexBalance.0 7
voice.aes.hf.duplexBalance.1 7