Setting up audio features, Low-delay audio packet transmission, Jitter buffer and packet error concealment – Polycom SOUNDPOINT SIP 2.2.0 User Manual

Page 90: Setting up audio features –42, Emplo

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Administrator’s Guide SoundPoint IP / SoundStation IP

4 - 42

l

Set the roaming_privacy.reg element to the number corresponding

to the LCS registration.
For example, roaming_privacy.reg = 2
Refer to

Roaming Privacy <roaming_privacy/>

on page

A-99

.

m

Save the modified phone1.cfg configuration file.

Setting Up Audio Features

Proprietary state-of-the-art digital signal processing (DSP) technology is used

to provide an excellent audio experience.
This section provides information for making configuration changes for the

following audio-related features:

•

Low-Delay Audio Packet Transmission

•

Jitter Buffer and Packet Error Concealment

•

Voice Activity Detection

•

DTMF Tone Generation

•

DTMF Event RTP Payload

•

Acoustic Echo Cancellation

•

Audio Codecs

•

Background Noise Suppression

•

Comfort Noise Fill

•

Automatic Gain Control

•

IP Type-of-Service

•

IEEE 802.1p/Q

Low-Delay Audio Packet Transmission

The phone is designed to minimize latency for audio packet transmission.
There are no related configuration changes.

Jitter Buffer and Packet Error Concealment

The phone employs a high-performance jitter buffer and packet error

concealment system designed to mitigate packet inter-arrival jitter and

out-of-order or lost (lost or excessively delayed by the network) packets. The

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