Local Conference Mixing - Polycom SoundPoint IP 600 SIP Administrator's Manual

Administrator Guide - SoundPoint
Local

3.3.3 Local Conference Mixing

SoundPoint
encing capability. This feature can be used to set up local three-party conferences
where no external protocol signaling is involved.
3.3.4 Voice Activity Detection (VAD)
The purpose of VAD is to conserve network bandwidth by detecting periods of relative
"silence" in the transmit data path and replacing that silence efficiently with special
packets that indicate silence is occurring. For those compression algorithms without
an inherent VAD function, such as G.711, SoundPoint
prehensive codec-independent comfort noise transmission algorithm specified in RFC
3389. This algorithm is derived from G.711 Appendix II, which defines a comfort
noise (CN) payload format (or bit-stream) for G.711 use in packet-based, multimedia
communication systems. SoundPoint
Silence Insertion Descriptor (SID) frames) and also decodes CN packets, efficiently
regenerating a facsimile of the background noise at the remote end.
Central
(boot
server)
Local
36
®
IP
Web Server
(if enabled)
Local Phone User
Interface
® IP's audio processing subsystem contains a flexible three-party confer-
Configuration file:
ipmid.cfg
Web Server
(if enabled)
Local Phone User
Interface
Copyright © 2004 Polycom, Inc.
Set the jitter buffer tuning parameters including minimum
and maximum size and shrink aggression.
Navigate to: http://<phoneIPAddress>/coreConf.htm#au
Changes are saved to local flash and backed up to <Ethernet
address>-phone.cfg on the boot server. Changes will per-
manently override global settings unless deleted via the
Reset User Settings menu selection.
None.
®
IP is compatible with the com-
®
IP generates CN packets (also known as
Enable or disable VAD and set the detection threshold.
• For more information, see 4.6.1.6.10 Voice Activity
Detection <VAD/> on page 77.
None.
None.
Features