[Freeswitch-users] polycom one-way audio problem

I have two Polycom phones (one 550 and one 650) successfully registered to the switch. If I call from either extension to the other and answer, audio flows from the calling party to the called party, but audio does not flow from the called party back to the calling party. Even more strange, the called party does not answer, then when the call is sent to voicemail, the calling party *also* does not hear any of the voicemail greeting, though they are recorded successfully. Calling the voicemail box directly from either phone *does* work, and the calling party can hear the prompts just fine in that case. There is no NAT between the phones and FreeSWITCH. Suggestions? Matthew Kaufman matthew@matthew.at