Huawei AR1200 Series - Page 41

Establishing the Configuration Task
Before setting DSP parameters, familiarize yourself with the applicable environment, complete
the pre-configuration tasks, and obtain the data required for the configuration. This will help
you complete the configuration task quickly and accurately.
Applicable Environment
The digital signal processing (DSP) collects, converts, filters, measures, enhances, compresses,
or identifies signals and coverts the signal from an analog to a digital form.
The DSP module converts analog voice signals into digital signals and stores a certain number
of digital signals into packets for transmission. To improve the voice communication quality,
the DSP needs to further process voice signals.
Pre-configuration Tasks
Before setting DSP parameters, complete the following task:
l Configuring IP addresses and routing protocols for interfaces to ensure connectivity
Data Preparation
To set DSP parameters, you need the following data.
No.
Data
1 VBD switching mode
2 Default DSP channel code type and default interval at which the DSP channel
packetizes RTP packets
3 T.30 redundancy parameter value of the T.38 fax, T.4 redundancy parameter value
of the T.38 fax, fax training mode, and maximum fax training rate
4 Alarm threshold of the dynamic jitter buffer, initial value of the dynamic jitter buffer,
maximum value of the dynamic jitter buffer, maximum value of the static jitter buffer,
minimum value of the dynamic jitter buffer, minimum value of the static jitter buffer,
and initial value of the static jitter buffer of a DSP channel
5 RTP payload type value, G.726-16k payload type value, G.726-24k payload type
value, G.726-32k payload type value, G.726-40k payload type value, NTE payload
type value, redundancy payload type value, and VBD payload value of a DSP channel
6 Interval at which a DSP channel sends RTCP packets and threshold for the number
of severe degrade seconds
7 Resource threshold in hierarchical control mode
8 Data event transmission mode, special process, DTMF transmission mode, echo
cancellation function, input gain, output gain, jitter buffer mode, NLP mode, and DSP
working mode in a DSP template
9 DSP loopback type and DSP channel parameters
Huawei AR1200 Series Enterprise Routers
Configuration Guide - Voice 1 SIPAG Configuration
Issue 03 (2011-09-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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