[Asterisk-Users] MEETME core uses ulaw?

[BJ Weschke]

 I was going to recommend the same to him last night, but then I
started digging into the code there and realized they were transcoding
back to LINEAR at their core as well. Now they're not passing that
back through a ZapTel psuedo channel like app_meetme does, but I'd be
interested to see if that fixes the delay issue discussed.


On 5/4/05, mattf <mattf at vicimarketing.com> wrote:
> Look at the app_conference description on the wiki:
> http://www.voip-info.org/tiki-index.php?page=Asterisk%20app_conference
> 
> I believe it does what you want to do, but I really don't know if it works
> with CVS_HEAD or stable releases. I'd be curious to hear how it affects
> performance as well.
> 
> MATT---
> 
> -----Original Message-----
> From: Dan Morin [mailto:DMorin at ABBCOInc.com]
> Sent: Wednesday, May 04, 2005 1:03 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: [Asterisk-Users] MEETME core uses ulaw?
> 
> So no one has any ideas about how to get MeetMe to work with a codec other
> than ulaw?
> 
> Is anyone successfully doing it?
> 
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Dan Morin
> Sent: Tuesday, May 03, 2005 10:26 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: [Asterisk-Users] MOH Core uses ulaw...
> 
> 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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