Polycom PVX Software

http://www.polycom.com/usa/en/products/video/video_conferencing_systems/desktop/pvx.html

Update required to run on Vista:
http://www.polycom.com/usa/en/support/video/pvx/pvx_804_4035.html

Port Forwarding Required For PVX Software

Polycom PVX Port Information

Port              Service                   Type

1503             T120 Data              TCP

1720             H323 Call Setup      TCP

5060             SIP Call Setup         TCP and UDP

3230-3237     Signalling              TCP and UDP