HI,
I have an issue with one of my Af200 setups. I can only get outgoing audio out of it. Cant get anything in. I thought it was a firewall issue, but I have the quintum in the DMZ.
If you are getting one way voice it probably still is a firewall issue. I know that in some firewalls, just putting the unit in the DMZ may not be enough and you may need to manually forward all ports to it as well. I know that this sounds like double effort, but I had to do that on my Westell unit.
One other thing, if you have a private IP assigned to the quintum, make sure that you set the external ip to the public IP address.