You can hold web conferences, share your screen, schedule phone conference calls or invite people to your private web conference room. 
WebEx Meeting Center allows Web-based audio and video conferencing from your desktop. You can invite up to 1,000 participants to attend meetings by telephone, on their computer, or via iPhone, iPad, and other mobile devices.
WebEx provides telephone only conferencing at considerable savings over other telephone conferencing services. You can begin using WebEx immediately by visiting the website and logging in with your NetID. If you need to access the toll free number, you will need to set that up with the OIT Service Desk by providing a fund code. You and your participants may always use the toll number (this is a good option since most phone services now include long distance).