[Asterisk-Users] MOH and VAD

Juan J. Sierralta P. juanjo at atmlab.utfsm.cl
Fri Oct 17 07:04:45 MST 2003


On Fri, 2003-10-17 at 08:06, Mark Spencer wrote:

> > 	But my second questions arises, why VAD affects MOH since VAD is
> > on the ATA but MOH on Asterisk should transmit anyway.
> 
> In order to keep the timing clean, Asterisk transmits precisely the same
> number of bytes of audio when running a sound generator (MOH, GenTones,
> etc), thus synchronizing the production of sound to the clock on the
> remote system.  If we generate the audio ourselves independently of the
> far end (e.g. off a zap timer) then there will be slips relative to the
> far end.  It would certainly be possible to add such a feature, but I'm
> not sure it's a good idea.

	Thanks Mark !
	Where is code that control that ? I´ll like to play with it a bit, I
saw the warnings about not supporting RFC3389 it is posible to use CN or
its RTP timestamp to get the remote clock ?

TIA
-- 
Juanjo sin .sig




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