[asterisk-users] Switch to Multi-Proc -> Choppy sound?

[Bill Binko]

Hello, everyone

I'm relatively new to Asterisk (and VOIP in general), but I have a
project that it will really help with.  So, I setup a test system on an
ancient 400MHz P3 we had lying around.  It worked great.  I had a test
dialplan working, and had no trouble connecting to it with SIP using 3CX
SoftPhone over our LAN (and over the Net through our NAT).

So, we went ahead and bought a server to put up on our colo site with
our web apps and database.  We put together a 2 proc, dual-core AMD
system with 8GB memory, plenty of disk space (>2TB) 3 GB NICs etc. and
setup Asterisk 1.4.13 (from source) on it.

There is no telephony hardware on the box, so we load ztdummy (manually
for now in the asterisk startup script).

When we run the same tests, we get garbled, choppy sound through even
with exactly the same dialplan, sounds, etc.  The load doesn't even
register, and I can't imagine that it's a true performance issue.  We
have tried multiple codex (ulaw, alaw, speex, ilbc, everything 3CX
supports) and have the same issues.

Is there some step I'm missing when using a multi-proc machine?

Thanks
Bill

PS: I have been trying to get this to post to the list for a while and 
am not getting it through... any help?