Three-Way Calling Three-Way Calling adds a third person, local or long distance, to your phone conversation at any time.
As long as the originator of the three-way call stays on the line, either of the other parties can hang up and leave the remaining two callers to continue their conversation. To disconnect the entire three way conversation, the person who made the three-way call must hang up.
All calling features are subject to availability and compatibility restrictions.
Instructions for FiOS Digital Voice Calling Features