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Administrator Guide - SoundPoint
®
IP / SoundStation
®
IP Features
Copyright © 2004 Polycom, Inc. 41
3.2.9 Last Call Return
The phone allows server-based last call return. This feature depends on support from a
SIP server.
3.3 Audio Processing Features
Proprietary state-of-the-art digital signal processing (DSP) technology is used to pro-
vide an excellent audio experience.
3.3.1 Low-Delay Audio Packet Transmission
The phone is designed to minimize latency for audio packet transmission.
3.3.2 Jitter Buffer and Packet Error Concealment
The phone employs a high-performance jitter buffer and packet error concealment sys-
tem designed to mitigate packet inter-arrival jitter and out-of-order or lost (lost or
excessively delayed by the network) packets. The jitter buffer is adaptive and config-
urable for different network environments. When packets are lost, a concealment
algorithm minimizes the resulting negative audio consequences.
Central
(boot
server)
Configuration file:
ipmid.cfg
Turn this feature on or off.
• For more information, see 4.6.1.21 Feature <feature/>
on page 109.
Specify the string sent to the server for last-call-return.
• For more information, see 4.6.1.10 Call Handling
Configuration <call/> on page 92.
Local
Web Server
(if enabled)
None.
Local Phone User
Interface
None.