[Asterisk-Users] Re: G729 and Meetme

[Bill Michaelson]

I suppose that in order to accomplish conferencing, Asterisk must produce a broadcast audio stream (waveform) which is a numerically combined derivative of all of the input audio streams.  In order to do so, it almost cetainly will work with uncompressed data.  Therefore, encoding such as G.729 is unsuitable for this purpose.  It must be decoded first.

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I have noticed that when I try to connect multiple G729 VoIP devices into a MeetMe conference that I can only add up to the number of G729 licenses I have.  Now I would think that because all the devices are G729, this wouldn't be the case and the only license that would ever be used would be if a non G729 device or Zap channel was a part of the Meetme conference.  This is apparently note the case.  Can anyone explain to me exactly why this is.  I don't really mind buying more licenses if I need to but I can't seem to wrap my head around where the Codec translation that is requiring the license is taking place.

Regards,

Raymond McKay