AT&T SYSTEM 25 Manual page 130

An attendant can set up a conference that includes System 25 stations as well as outside
callers. A conference call can have a maximum of five conferees; however, no more than two
of the conferees may be on outside lines. The basic technique for setting up a conference is
to start with an established call, then contact the new parties, one at a time, and add them to
the conference.
Once a conference has been set up, a DTAC attendant can selectively drop a previously
added party from the call. A SLAC attendant can drop parties before they are placed in a
conference. However, once in a conference, a SLAC attendant cannot drop any conferee
without losing all of the parties since all the conferees are on the same loop. Individuals
who want to drop out of a conference placed via the SLAC can do so by hanging up.
DTAC
Setting Up a Conference
1
Use your DTAC or Selector Console to dial the first party.
2
Announce the conference call.
3
Press
The green light next to the button of the held call winks intermittently.
4
Use your DTAC or Selector Console to dial the second party, or press the
line button for that party.
NOTE:
(busy, no answer, or misdial), you should do the following:
a
b
5
Announce the conference call.
6
Press the button next to the winking light to join the conference parties
together.
7
If you want to add additional conferees, return to Step 3 and continue.
Conferencing
[ C O N F E R E N C E ]
If, for any reason, this call should not be added to the conference
Press the switchhook and then release.
If you are reconnected to the first party, return to Step 3 and continue.
Otherwise, return to Step 4 and continue.
and listen for dial tone.
Conferencing 3-13