Organizers of an audio conference should ensure that its preparation checklist includes testing the facility, testing the connection and informing the participants of the details of the activity and contingency plan. Organizers should test the audio conference facility before the actual activity is held to ensure that the voice reception is clear. This is very important because, in most cases, accompanying written materials are not readily available to the participants. Thus, they have no fallback plan when they do not receive the message from the speaker clearly. Aside from testing the facility, organizers should also ensure that the connection or call-in capability is well established. Organizers should be wary of the maximum number of participants allowed to connect to the audio conference. More on telephone conference calls.