1. Establish a call with the first party
2. Place them on hold
3. Establish a call with the second party
4. While still connected to the second party, enter Feature+3
5. Press the line/intercom button where the first party is on hold (*Note on some phones the calls may automatically conference)
6. Hang up to end the conference call
To remove yourself from the conference call so that the other two parties remain connected press Feature+7+0.