# Entry options Ways that participants can join the operator-assisted conference. # Greeted entry For conferences with up to 750 participants. With greeted entry, attendees call in and an operator greets them and directs them to your conference. Operators can also perform enhanced services such as collecting participant information and screening participants. For example, if you do not want media members or a competitor’s employees to join, you can ask the operators to screen participants before they are put into the conference. # Passcode entry For conferences with up to 15,000 participants. With passcode entry, attendees call in and an automated system prompts them to enter the passcode for the conference using their phone keypad. The automated system can also collect participant information.