User's Manual 17. Media
Version 6.8 179 Mediant 500L MSBR
17 Media
This section describes the media-related configuration.
17.1 Configuring Voice Settings
The Voice Settings page configures various voice parameters such as voice volume,
silence suppression, and DTMF transport type. For a detailed description of these
parameters, see ''Configuration Parameters Reference'' on page 779.
To configure the voice parameters:
1. Open the Voice Settings page (Configuration tab > VoIP menu > Media > Voice
Settings).
2. Configure the Voice parameters as required.
3. Click Submit.
4. To save the changes to flash memory, see ''Saving Configuration'' on page 606.
17.1.1 Configuring Voice Gain (Volume) Control
The device allows you to configure the level of the received (input gain) Tel-to-IP signal
and the level of the transmitted (output gain) IP-to-Tel signal. The gain can be set between
-32 and 31 decibels (dB).
The following procedure describes how to configure gain control using the Web interface.
To configure gain control using the Web interface:
1. Open the Voice Settings page (Configuration tab > VoIP menu > Media > Voice
Settings).
Figure 17-1: Voice Volume Parameters in Voice Settings Page
2. Configure the following parameters:
• 'Voice Volume' (VoiceVolume) - Defines the voice gain control (in decibels) of the
transmitted signal.
• 'Input Gain' (InputGain) - Defines the PCM input gain control (in decibels) of the
received signal.
3. Click Submit.
17.1.2 Silence Suppression (Compression)
Silence suppression (compression) is a method for conserving bandwidth on VoIP calls by
not sending packets when silence is detected. The device uses its VAD feature to detect
periods of silence in the voice channel during an established call. When silence is
detected, it stops sending packets in the channel.
The following procedure describes how to enable silence suppression using the Web
interface.
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