[Asterisk-Dev] Maximum Meetme size?

[Tony Mountifield]

I've been doing some tests with larger conferences in MeetMe, using VoIP
channels, and have found that the audio starts to degrade after around
10 participants, and becomes unintelligible before reaching 20 participants.
The output of "top" shows the CPU is still 98% idle, so it is not running
out of grunt.

I have noticed though that quailty is fine if I have the 20 VoIP calls
distributed among several different conference rooms with only a few
participants in each.

I'm currently using OH323 as the VoIP interface. For testing, I am
originating a whole bunch of calls from another server, which for each
channel records everything it hears until hangup. I am called into the
conference myself and am talking while performing the test.

Before I dive into the code, could others here tell me the maximum size
of a MeetMe conference they have achieved, using (a) VoIP channels, and
(b) Zaptel channels?

What I don't know yet is whether this degradation is a result of the
summing algorithm used in the Zaptel driver, or of something within
MeetMe itself.

Any comments appreciated!

Tony
-- 
Tony Mountifield
Work: tony at softins.co.uk - http://www.softins.co.uk
Play: tony at mountifield.org - http://tony.mountifield.org