So, after much research, I was able to find the proper trunk config setting that would work with VOIPo. You can find them in this thread: http://forums.voipo.com/showthread.p...isk-Help/page2

It turns out that the way VOIPo is setup. The incoming settings (USER context and USER details) aren't even used since they expect users to be using a VOIP adapter therefore you have to establish the context in the PEER details section. In case the above thread disappears for some reason. Here are the settings that worked for me (put these in the PEER Details):

Code:
username=38XXXXXXX
type=peer
session-timers=accept
session-refresher=uac
secret=XXXX(Put your SIP password here)XXXXX
rfc2833compensate=yes
qualify=5000
nat=no
insecure=port,invite
host=sip.voipwelcome.com
dtmfmode=auto
disallow=all
context=from-trunk
canreinvite=no
allow=ulaw