Administrator Guide - SoundPoint® IP / SoundStation® IP Optimization
82 Copyright © 2004 Polycom, Inc.
4.6.1.6.4 Acoustic Echo Cancellation <AEC/>

These settings control the performance of the speakerphone acoustic echo canceller.

Do not alter these values.
Attribute Default
voice.aec.hs.enable 0
voice.aec.hs.lowFreqCutOff 125
voice.aec.hs.highFreqCutOff 3800
voice.aec.hs.erlTab_0_300 -24
voice.aec.hs.erlTab_300_600 -24
voice.aec.hs.erlTab_600_1500 -24
voice.aec.hs.erlTab_1500_3500 -24
voice.aec.hs.erlTab_3500_7000 -24
voice.aec.hd.enable 0
voice.aec.hd.lowFreqCutOff 125
voice.aec.hd.highFreqCutOff 3800
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 125
voice.aec.hf.highFreqCutOff 3800
voice.aec.hf.erlTab_0_300 -6
voice.aec.hf.erlTab_300_600 0
voice.aec.hf.erlTab_600_1500 0
voice.aec.hf.erlTab_1500_3500 -6
voice.aec.hf.erlTab_3500_7000 -6