MPX audio conferencing

Unanswered Question
Mar 26th, 2010

Hi all,

My customer has a 2 nodes CM cluster and a MPX (also CUPS and CUPCs...)

The point is that I'm trying to do audioconferences and the parties, located at differente sites, speak a mixture of G.711 and G.729.

For this reason, CM CFB doesn't work.

So I thought of using MPX to do the audioconferences.

To be honest, I don't know much about MPX, I just tested videoconferencing and some web collaboration, and we usually configure conferencing resources into routers to overcome this sw conference limitation, but as I saw that the MPX could do audioconferences I thought it was worth it to give it a try.

But it doesn't work. If all the parties speak G.711 it works fine, but as soon as one of the parties speak G.729 the conference drops.

As I said, my knowledge regarding MPX is very limited (and my ability to find what I was looking for in the documentation too :-), but I saw that you could specify the number of ports reserved for G.711 sessions and for G.729 sessions (and I did it so), so I thought ithe MPX could do transcoding if necessary.

Am I right? Should it work and I'm just misconfiguring the MPX?

Or do I need to configure transcoding in routers anyway?

Thanks in advance.

Best regards,


I have this problem too.
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