Polycom SoundPoint IP 600 SIP Administrator's Manual page 78

Administrator Guide - SoundPoint
Attribute
voice.gain.tx.analog.preamp.handset
voice.gain.tx.analog.preamp.headset
voice.gain.tx.analog.preamp.chasis
4.6.1.6.4 Acoustic Echo Cancellation <AEC/>
These settings control the performance of the speakerphone acoustic echo canceller.
Changing these settings is not advised.
Attribute
voice.aec.hs.enable
voice.aec.hs.lowFreqCutOff
voice.aec.hs.highFreqCutOff
72
®
IP SIP
Permitted
Values
0, 14, 23, -1
0, 20, 32, 42,
-1
Permitted
Values
0, 1
125 to 7600, <
highFreqCut-
Off
125 to 7600, >
lowFreqCut-
Off
Copyright © 2004 Polycom, Inc.
Optimizing SoundPoint
TIA-810-A
Default Interpretation
23 Preamplifier gain in dB.
-1=mute
23
42
Default Interpretation
0 If set to 1, enable AEC for hand-
set.
125 PCM channel low frequency cut-
off, in Hz, for handset. Reason-
able upper limit is 300Hz
(narrowband telephony). The
frequency cut-offs define the fre-
quency range over which Tx
audio DSP (AEC, AES, etc.,) is
going to be performed. All Tx
outside this frequency range will
Tx to zero. These limits have no
effect when there is no DSP
being performed (such as in the
low delay handset mode).
3800 PCM channel high frequency
cutoff, in Hz, for handset. Rea-
sonable lower limit is 3500Hz
(narrowband telephony). The
frequency cut-offs define the fre-
quency range over which Tx
audio DSP is going to be per-
formed. All Tx outside this fre-
quency range will Tx to zero.
These limits have no effect when
there is no DSP being performed
(such as in the low delay handset
mode).