Huawei AR1200 Series Configuration Manual - Voice page 44

Huawei AR1200 Series Enterprise Routers
Configuration Guide - Voice
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
voice
The voice view is displayed.
Step 3 Run:
dsp
The DSP view is displayed.
Step 4 Run:
autovbd { auto | host-controlled }
The VBD switching mode is configured.
----End
Setting the Default DSP Channel Code Type and the Default Interval at Which a
DSP Channel Packetizes RTP Packets
This section describes how to set the default DSP channel code type and the default interval at
which a DSP channel packetizes RTP packets.
Context
The voice encoding technique encodes pulse-code modulation (PCM) samples into bits (frames).
This technique ensures robustness of voice services when the error code, network jitter, or burst
traffic occurs on a link. At the receiver side, voice frames are encoded into PCM samples, and
then are converted into voice waveforms. Different voice encoding techniques provide different
voice quality and a good voice quality requires high bandwidth.
In VoIP, before voice data are transmitted as UDP packets, the Real-time Transport Protocol
(RTP) processes the voice data. RTP is used to transmit real-time data and can transmit audio
and video data.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
voice
The voice view is displayed.
Step 3 Run:
dsp
Issue 03 (2011-09-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
1 SIPAG Configuration
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