I set up a new FOP2 install this weekend on a Paetec SIP service and I am getting one way audio. The settings are the same as in my other installs. Dialing from the phone audio is fine, dialing from FOP2 the number called you cannot hear what they say. Paetec has a different setup than my other SIP providers so I assume that is the issue. Wondering where I can try to hunt for a solution. For now I just turned the phonebook off so no one tries to use it.
BTW: Bought two licenses this weekend, one for this client and one for another. Love FOP2!