A conference call is a meeting that takes place over the telephone in which multiple callers are connected onto the same telephone call using a conference bridge and a conference code. Conference calls are also known and commonly referred to as a telephone conference call, audio conference, or a teleconference. Conference calls can have features which complement its service, and there is a participant capacity for each conference. There are several different types of conference calls available, such as an on-demand conference call which is an automated join in process for attendees and the host. Conference calls can also be handled with an operator, which is typically what is used to handle large events, or calls that require a custom welcome message and the collection of information from conference call participants.