As PVJ stated:

An Unsupervised Conference is established when you originate a Two External Party Con-ference call, leave the conference, and wants to free your extension of the conference call. This allows the two outside parties to continue their conversation after you have left the con-ference, however, you cannot re–enter the conference. Your telephone is then free to use.

A UNSUPERVISED CONFERENCE key (key code 838) is required for stations authorized to make unsupervised conferences.

Good Luck!!


If all else fails, use a BFH.