Has anyone ever had a problem with using the MGCP IP Phone over FIOS? The problem we are having is IP phone to IP Phone is working. Once the IP Phone tries to make a call to Voicemail, another phone or grab dial ton only have one way audio. I can hear them but they cannot hear me. We are using unfettered Internet. As a proof of concept have move the IP Phones and PUGW card to the internal MPLS network (No restrictions) and everything works fine. At this point i am not wanting to go through the exercise of creating tunnels for all the users to be on private network so we can control the port numbers. (30 users times 30 routers will take a while and be costly)

Adrian