[Asterisk-Users] Why Asterisk can't cope with silence suppression?

Peter Svensson psvasterisk at psv.nu
Wed Feb 16 09:42:02 MST 2005


On Wed, 16 Feb 2005, Rob Scott wrote:

> Why is it that Asterisk can't cope with silence suppression?
> All the clients seem to be able to but not Asterisk.
> What would be needed to get it to work with silence suppression?
> What is the problem?

Asterisk clocks outgoing rtp data to a device from the incoming rtp 
stream from the same device. This is a known limitation and there has been 
some talk about implementing an internal clocking system.

In addition, Asterisk should generate comfort noise when the rtp stream is 
quiet due to silence supression (which is signalled with a CN packet). 
Perhaps the new jitter buffer will be able to handle this?

Peter





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