[Asterisk-Users] MOH Core uses ulaw...

[Dan Morin]

I'm trying to get Asterisk setup as a conference bridge.  When I
originally tried MeetMe, I was using GSM and as the conference got
longer, the delay got worse and worse.  From my research, I assumed that
it was because MeetMe uses ulaw at its core, so everything is getting
transcoded twice and each instant adds more and more delay to the cycle.
To test this, I changed all of my connections to ulaw and now I get very
minimal delay.

 

However, this is not acceptable for me.  I'm anticipating most of my
meeting attendees to come in over my VoIP connection and if this voip
line is using ulaw, it will significantly reduce the number of
simultaneous users that my internet connection can handle.

 

So, it seems to me that I need to change the core codec of MeetMe to
something like GSM so that I can get OK call quality, while getting the
most out of my Internet connection.  Does anyone know how to do this?
Am I on the right track or way off with this one?

 

Is anyone using MeetMe with GSM or any other non ulaw codec and not
having a problem? 

 

Also (sorry so many questions) I'm not thrilled with GSM or iLBC.  I
know there are a lot of people who like G.729...what are the costs
involved with using this one?

 

Thanks in advance.
Dan

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