This document describes how to install Polycom PVX video conferencing software and configure it to work with the Thrane & Thrane EXPLORERTM500 satellite terminal for video conferencing over satellite networks. The Polycom software allows desktop video conferencing and was tested successfully for calls between a laptop connected to the EXPLORERTM500 terminal and a Polycom video conferencing system connected to an ADSL line. The EXPLORERTM500 must be configured for modem mode and the appropriate data service, and it provides internet connectivity for the laptop running the Polycom software to place and receive video calls.