I'm still struggling to figure out what my problem is and how to resolve it.  If anyone has a moment to check this out I'd really appreciate it.
 
I've also posted another set of logs, this time one from each server, in which I'm trying to call a conference extension on 10.15.100.10 from a Polycom endpoint registered to 10.15.100.20:
 
Polycom IP650   >>>   FreeSWITCH Server "A"   >>>   FreeSWITCH Server "B"
 
Log from FreeSWITCH server "A":  http://pastebin.freeswitch.org/17776
Log from FreeSWITCH server "B":  http://pastebin.freeswitch.org/17775
 
What's worse is I'm able to reproduce this problem on nearly every call.
 
Thanks again for your help.
 
~Brian

On Wed, Oct 26, 2011 at 8:03 PM, Brian Wiese <brian.wiese.freeswitch@gmail.com> wrote:
Hello again everyone!
 
I'm getting a strange result when calling from a Polycom endpoint on FS server "A" to FS server "B":  About one out of ten calls won't complete with the error "SIP/2.0 500 No session set by user".  If I immediately redial the number again it works.
 
Here's my log:  http://pastebin.freeswitch.org/17622
Note the response to the endpoint from server "A" on line 452.
 
Important IP addresses:
Polycom endpoint:  10.15.100.250
Server "A":  10.15.100.20
Server "B":  10.15.100.10
 
I'm on the latest revision (git-2f786a0 2011-10-26 12-57-59 -0500) as well.
 
I appreciate your help.
 
~Brian