Try:
Outgoing:
username=user
type=peer
secret=pass
qualify=yes
host=XXXXXXXX
fromuser=user
insecure=port,invite
context=from-trunk
Incoming:
(leave blank)
Try:
Outgoing:
username=user
type=peer
secret=pass
qualify=yes
host=XXXXXXXX
fromuser=user
insecure=port,invite
context=from-trunk
Incoming:
(leave blank)