Last Call Return; Audio Processing Features; Low-Delay Audio Packet Transmission; Jitter Buffer And Packet Error Concealment - Polycom SoundPoint IP 601 Administrator's Manual

Administrator Guide - SoundPoint

3.2.9 Last Call Return

The phone allows server-based last call return. This feature depends on support from a
SIP server.
Central
(boot
server)
Local

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.
® ®
IP / SoundStation IP
Configuration file: Turn this feature on or off.
sip.cfg
•
Specify the string sent to the server for last-call-return.
•
Web Server None.
(if enabled)
Local Phone User None.
Interface
Copyright © 2005 Polycom, Inc.
For more information, see 4.6.1.23 Feature <feature/>
on page 125.
For more information, see 4.6.1.12 Call Handling
Configuration <call/> on page 108.
Features
47