Silence suppression has been used in the past to reduce a white noise that can show up on the voice . In over 9 years , I have not used it as it can cause issues . I am not sure what you would use it for , eg , reduce packets , but I can see it removing some of the packets . Compression can be used to reduce overhead on the packets . You can prob troubleshoot your network and find the root cause of why the change sin your settings caused the issue but again , I do not know of anyone that uses Silent Supression anymore !
Page 501 of the manual states for a condition known as congestion , silence suppression would be used to remove some packets .
You can reduce NBX systemās bandwidth
requirements by enabling
āsilence suppression,ā but doing so
compromises audio quality. NBX
Telephones generate voice frames at
regular intervals for the duration of
a connection. These frames normally
continue when no one is speaking.
When silence suppression is enabled, the
NBX system sends a āsilence
indicatorā when the NBX Telephone
senses the start of a silent period.
When another NBX device receives this
indicator, it inserts āwhite noiseā
until it receives the next frame that
contains real voice. All subsequent
āvoicelessā frames are suppressed
during the silent period. However,
most telephone users will notice the
difference between genuine silence
and generated silence.
This type of silence suppression applies to Layer 2 Ethernet transfers. At
Layer 3, the ConneXtions software achieves a similar result by not
sending empty packets during a silent period. The receiving ConneXtions
gateway generates a silence indicator or sends frames filled with silence,
depending on the silence suppression mode.
Congestion
Users notice congestion when audio ābreaks upā during a call.
Congestion can occur anywhere on the
network, for example, at an
overloaded LAN (local or remote), at an
overloaded router or firewall, or
within an overloaded internet. Because
voice packets are only significant
during a conversation, IP networks
respond to congestion by discarding
data packets they cannot accommodate.
Resending or delaying packets is
not an effective solution.
At the local level, congestion symptoms can be subtle. For example,
routers from different vendors can
respond differently to congestion
because of the way they prioritize their
response to packet congestion.
When considering communications
problems, it is important to maintain
reserve capacity and to use a systematic
approach that considers the
entire, end-to-end, connection.
This message was edited by merlin on 2-9-10 @ 8:03 AM
