Huawei AR1200 Series Configuration Manual - Voice page 51

Huawei AR1200 Series Enterprise Routers
Configuration Guide - Voice
Configuring a DSP Channel
This section describes how to configure a DSP channel.
Context
You can enable a digital signal processor (DSP) channel to work in loopback mode, and set the
loopback mode (PCM-side loopback test and IP-side loopback test). When the DSP channel
between the calling party and called party cannot transmit signals or can transmit signals only
in one direction, run the loopback command to locate the fault. If the calling party hears the
echo in a PCM-side loopback test, the speech channel between the calling phone and the calling
DSP channel is functioning properly. If the called party hears the echo in an IP-side loopback
test, the speech channel between the called phone and the calling DSP channel is functioning
properly.
To control resources of DSP channels, prohibit the DSP channels. The prohibited DSP channels
cannot participate in resource allocation.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
voice
The voice view is displayed.
Step 3 Run:
dsp-dimm slot/dsp-index
The DSP resource management view is displayed.
Step 4 Run the following commands as required.
l
l
----End
Checking the Configuration
After the configuration of DSP parameters is complete, you can view the DSP parameters
including fax parameters and jitter buffer parameters.
Procedure
l
Issue 03 (2011-09-30)
Run:
loopback loopback-type channel
The loopback function is configured on a DSP channel.
Run:
prohibit channel [ count ]
DSP channels are prohibited.
Run the display voice dsp command to check the DSP configuration.
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