AT&T System 25 - Manual (Page 19)

Conference Calls
You can set up a conference that includes a combination of
System 25 extensions as well as outside calls. You may have up
to five conferees; however, no more than two may be on outside
lines.
Setting Up Conference Calls
1 Dial the first person and announce the conference call.
2 Press and listen for dial tone.
The light next to the held call blinks intermittently.
3 Dial the next person you want added to the conference.
NOTE: If for any reason this call should not be added (busy,
no answer, or misdial): press the switchhook, then the
button associated with the first person; go back to Step 2 and
continue.
4 Announce the conference call to the added person.
5 Press the button next to the blinking light to join the calls
together.
6 For each person you, want to add, go back to Step 3 and
continue the same procedures.
Dropping a Conferee
When you drop someone from the conference, anyone that was
added by that person is also dropped unless they are on a
Bridged Access or Personal Line button. If you drop the person
who added you to the conference, you will also drop anyone
added to the conference by that person.
1 Press
2 Press the button of the person you want to drop.
The light associated with the dropped call goes off.
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