About this task
Silence suppression eliminates background noise transmission over the network when a user is not speaking. Instead of transmitting actual background audio noise in the audio stream, comfort noise indications are transmitted (see RFC3389). This reduces the network bandwidth used by the user session.
Refer to the following definitions for descriptions of each QoS silence suppression property:
Definitions for silence suppression properties |
Property |
Description |
Silence Suppression CN Level |
The silence suppression comfort noise (CN) level in dB as defined by RFC3389. The default is minus (–) 127 dB. The range is minus (–) 127 dB to 0 dB. |
Silence Suppression Interval (ms) |
The number of milliseconds between successive 3389 RTP SS packets. The default is Disabled. The range is 0 to 2147483647 milliseconds. |
Silence Suppression Threshold (ms) |
The number of milliseconds before transmitted RTP silence is suppressed with 3389 SS packets. The default is 20 milliseconds. The range is 0 to 2147483647 milliseconds. |
Perform the following procedure to configure the silence suppression options:
