Asterisk with Cisco ASA

Morning all,

I’m trying to setup external access for my boss to have four cisco phones at his home that hit an Ip on our ASA firewall that goes back to our Asterisk server. I’m attempting to do this so I don’t have to redo his home network. The issue I’m having at the moment is I’ve worked with Cisco to make sure all the settings on the ASA are correct and traffic is being let through the ASA when you hit the external address going back to the server at I can see the translation taking place on the ASA but my Bria phone is not either getting the server or is not able to register.

Has anyone done this successfully before or have any suggestions? If you need further information I would be happy to provide.