AT&T MERLIN LEGEND Release 2.0 Analog Direct-Line Console Operator's Manual page 74

Features
4. Call the next outside number or extension.
5. Confirm participation:
6. Press Conference again to add another person.
You are separated from the conference while you add the next
person, but the participants can still talk.
7. Repeat Steps 2 through 5 to add more participants.
8. While on a conference:
9. To end the conference, hang up.
If the participant is available, announce the
conference and press Conference.
All participants, including you, are connected.
If the participant is unavailable, hang up.
Press another line to add another party or press
the line with the existing conference to return to
the conference.
Disconnect yourself without ending the call by
pressing Hold.
Participants are able to converse, and you can continue to
receive calls.
Rejoin the conference by pressing any SA or
ICOM or line button for a conference
participant.
Disconnect a conference participant by
pressing Drop and then pressing participant's
line button.
You cannot use Drop when the conference is
on hold.
4-25
Conference