[cisco-voip] Conference with G.711 and G.729

[Paul Choi]

Usually transcoding is done via DSPs installed in the
gateways or via a hardware MTP which is likely packed
with DSPs also. This is my understanding and I could
very likely be incorrect.

--- Reto Gassmann <voip at mrga.ch> wrote:

> Hi all
> we run a CM 4.2(3) and have some phones wih G729 and
> some phones with G711. It
> is not possible to set up a conference between G729
> and G711 phones.
> What do I need if I want to enable conferences
> between G711 and G729 phones?
> 
> Cisco writes about transcoders, but as it seems all
> of them are hardware based.
> So if I understand that right: the CallManger itself
> is not able to do the
> transcoding work.
> 
> Thanks for feedback
> Reto
> 
> 
> 
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