Polycom Version 1.4.x 17 - Manual (Page 53)

Administrator Guide - SoundPoint ® IP / SoundStation ® IP Features
Copyright © 2004 Polycom, Inc. 45
3.3.9 Background Noise Suppression (BNS)
This feature, designed primarily for handsfree operation, reduces background noise to
enhance communication in noisy environments.
3.3.10 Comfort Noise Fill
Comfort noise fill is designed to help provide a consistent noise level to the remote
user of a handsfree call. Fluctuations in perceived background noise levels are an
undesirable side effect of the non-linear component of most AEC systems. This fea-
ture uses noise synthesis techniques to smooth out the noise level in the direction
toward the remote user, providing a more natural call experience.
3.3.11 Automatic Gain Control (AGC)
This feature, applicable to handsfree operation, is used to boost the transmit gain of the
local talker in certain circumstances.
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This increases the effective user-phone radius
and helps with the intelligibility of soft-talkers.
3.4 Presence and Instant Messaging Features
The phone contains both Presence and Instant Messaging features. These features are
compatible with Microsoft
® Windows ® Messenger and MSN ® Messenger version 4.7
and Windows ® Messenger 5.0. The phone’s presence and instant messaging features
are integrated with the contact directory features, using its contact database.
3.4.1 Presence
The Presence feature allows the phone to monitor the status of other users/devices and
allows other users to monitor it. The status of monitored users is displayed visually
and is updated in real time. The user can block others from monitoring her phone and
is notified when a change in monitored status occurs
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. Phone status changes are
broadcast automatically to monitoring phones when the user engages in calls or
3. AGC support will be available in a subsequent release.
4. Notification when a change in monitored status occurs will be available in a subsequent release.