Unreserved conferences are identified by their name, which has to be unique within your account. They are created when the first participant joins the conference and are destroyed when the last participant leaves the conference. There is no limit to the number of times that a conference with a particular name can be created and destroyed. They are quick to set up and can be spontaneous and informal. When designing a conference platform using conferences it will be important to ensure that the inbound application will police the start and end time of the conference. If somebody phones in too early you might not want the conference to be created, similarly if someone phones in too late.