How to Start A Conference Written by majing    January 30, 2008 14:56 Dial the access number number for your region. Calls from within the USA: Dial Toll-Free : (800)444-2801. Calls from outside the USA: View a list of international access numbers. Enter your conference code. Enter your security code (only needed when starting a conference.) To allow others to join your conference, you will need to give them the access number, and your conference code. You may begin speaking once you hear the chime signifying another party has joined the conference. You can connect up to 50 parties simultaneously in a single call.